# A regulations app with only 5 ratings, selling for NT$1,980 one-time, climbed to #12 in Taiwan's Reference Top Grossing

> Source: https://stringers.io/en/apps/ios_6804362217.html (Stringers / 什么值得做, generated 2026-11-08)
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> In 2026 July 1, Taiwan's major Occupational Safety and Health Act revision took effect. Workers rushed to check the new provisions, and the app took the No. 1 spot for "occupational safety" in the App Store. Reference category charts have low entry barriers, and a few high-priced orders pushed it onto the chart.

[Mobile App](https://stringers.io/en/apps/index.md) · iOS · written 11-6

Job

Occupational Safety Law Quick Reference · Cheng Han Hsieh

# A regulations app with only 5 ratings, selling for NT$1,980 one-time, climbed to #12 in Taiwan's Reference Top Grossing

**What it is** An iPhone app for Taiwanese occupational safety professionals to look up regulations: over a hundred occupational safety and labor laws, searchable offline, each with a plain-language explanation, read-aloud support, and a countdown to effective dates; monthly NT$160, yearly NT$1,280, one-time purchase NT$1,980.

**Why it took off** In Jul 2026 1, Taiwan's major revision of the Occupational Safety and Health Act took effect, and practitioners rushed to look up the new provisions; it grabbed the top spot for "职安法" searches on the App Store. The Reference Top Grossing chart has a low bar, so a few high-priced purchases were enough to push it onto the chart.

**B** **How you could follow it** Don't copy this app, copy the approach: pick an industry (fire safety, construction, environmental protection, food) or country (Japan, South Korea occupational safety laws) whose law was just overhauled, launch before the effective date, use a name practitioners would search for, add offline access plus plain-language explanations plus read-aloud, and sell a yearly plan and a one-time purchase.

Grade B: the approach is clear and cheap, and nobody has followed it yet; but each market is small, its own revenue is only a trickle, the laws are public, general AI keeps getting better, and how big it can get depends on the niche you pick.

Data (updated daily) · First released 2026-09-05 · Taiwan rating 5 · Charted in 11-08 of 1 stores

iOS · best category chart rank · by store

Data 2026-10-28 → 2026-11-08 (12 days, 11 observations). Lower rank is higher; gaps mean it wasn't charted that day

iOS · Ratings count · Taiwan

Data 2026-10-28 → 2026-11-08 (12 days, 11 observations). Apple doesn't publish download counts; rating growth is a proxy for downloads.

"Occupational Safety Law Quick Reference" is an iPhone app built by an individual developer in Taiwan: it puts over a hundred occupational safety and health regulations on your phone, searchable offline, each with a plain-language explanation, and it can read them aloud. Two months after launch it had only 5 ratings, yet in Nov 5 it hit #12 on Taiwan's App Store Reference Top Grossing chart. To be honest, it hasn't really taken off yet; it charted because the category has a low bar and high prices, so a handful of purchases was enough. What's worth studying is the approach: the laws had just changed drastically, a small group of people who check the regulations every day and can get their company to pay for it, and a high-priced professional tool. This approach can be moved to other industries and other countries.

### "Finally, an app for occupational safety"

On Sep 5, 2026, indie dev Cheng Han Hsieh put his one and only app on the Taiwan App Store. Four days later, the first review came in: user PinAn Chen gave it 5 stars, with the title:

> Finally an app for occupational safety==

The body was just one line: "hope it can be updated regularly." A week later the developer replied: "We will maintain and update it regularly."

That "finally" reflects the fact that Taiwan's occupational safety practitioners, including occupational safety and health managers, supervisors, safety nurses, site foremen, and people preparing for Grade A or Grade B certifications, used to look up regulations on their phones only through the official National Laws and Regulations Database website or by flipping through PDFs. Construction sites and plants often have no signal, the attached tables open as scanned images, and the text is hard to read.

### What it is

The store subtitle reads "occupational safety and health regulation search," and the official site's slogan is "for HSE workers who deal with regulations every day." According to the store description (11-06), it covers 135 regulations, 4,863 articles, and 317 attached tables and appendices, gathering four official categories (occupational safety and health, labor inspection, labor insurance, labor conditions and employment equality), plus related laws such as the Employment Service Act and the Anti-Stalking Act.

The features are all built around what's needed on site:

- **Fully offline** : the regulations are bundled in the app, so you can look things up at construction sites and plants with no network.

- **Original text and plain-language explanation side by side** : the original is reproduced word for word from the officially published version so it can be cited directly; 4,760 currently effective articles each have a plain-language explanation (whether it was generated with a large language model and then manually proofread is an inference, unverified).

- **Voice reading** : during playback the current sentence is highlighted, and you can skip to the previous or next article from the lock screen and headphones, so you can listen while wearing gloves or commuting by car.

- **Effective dates and countdown** : which article changed when, when it takes effect, and how many days are left.

- **Appendices reformatted as phone-friendly tables** , and colloquial terms and typos are searchable too; tracking lists, notes, six-color highlighters, and bookmarks mean that after long use it becomes your own regulations handbook.

Free to download, paid to unlock. Taiwan pricing (App Store page, 11-06): monthly NT$160, yearly NT$1,280, **one-time NT$1,980** .

### Why now

Taiwan's Occupational Safety and Health Act passed its third reading and was promulgated in December of 2025, **taking effect in July 20261** , with 11 implementing regulations starting the same day. The Ministry of Labor calls it the biggest revision in 2013 years: it adds a chapter on preventing workplace bullying, tightens upstream hazard prevention and contractor management for construction projects, and raises fines.

When regulations change drastically, the hardest part for practitioners is knowing which version applies and when each provision takes effect. This app launched two months later, and its store description specifically mentions "the workplace misconduct amendment took effect in July 2026, and the related regulations on workplace bullying and sexual harassment have been added," and the "effective countdown" feature speaks directly to that problem.

The developer updates often: in the 8 weeks since launch, it released 15 versions (1.0.1 in Sep, 8,1.1.3 in Oct, 30 ...). It replies to every review, and one 5-star review praised exactly that: "Still early days, but the feedback is very quick." (10-18)

### How much it has actually sold

Not much. Going by the daily rankings on Taiwan's Reference chart:

| Date | Top Grossing | Top Free | Total ratings |
|---|---|---|---|
| 10-28 | 96 | 154 | 4 |
| 10-31 | 180 | 164 | 4 |
| 11-01 to 11-03 | Not charted | 194–201 | 4 |
| 11-04 | 36 | 166 | 4 |
| 11-05 | **12** | — | 4 |
| 11-06 | 35 | 153 | 5 |

The free chart has stayed between 150 and 200, with new downloads per day probably in the single digits to low teens (inference). The Top Grossing chart shows the typical pattern of a few orders arriving: off the chart for three days, then suddenly jumping to 36 and 12, then back to 35. The top dozen or so on Taiwan's Reference Top Grossing chart are almost all translation apps; #11 is MOJi dictionary and #13 is NetEase Youdao. The category overall has low spending, so a single NT$1,980 one-time purchase plus a few yearly subscriptions can push it into the top 20 (inference; exact counts can't be verified).

It has charted only in the Taiwan store, has no Android version, has 4.8 ratings, and has had 5 in total since September. Revenue is probably on the order of **a few to a dozen high-priced orders a month** (estimate). It isn't a business yet, but it proves one thing: occupational safety practitioners will pay a few thousand NT dollars for a regulations lookup app. A review in Oct 13 put it more bluntly, giving 4 stars:

> Hope they release a desktop version. As the title says, if there is one I'll buy the one-time version right away.

### Where users come from

Almost entirely App Store search. Searching "职安法" in the Taiwan store, it ranks #1; "工安" ranks #2; "职业安全卫生" is also in the top 8. The app name is the exact term users search for: "职安法" plus "速查".

A few other channels, all very small:

- **App Store "customers also bought"** : the page recommendations include "Occupational Safety and Health Facilities Rules Illustrated" and several certification question-bank apps, suggesting the buyers are the same people studying for certifications.

- **Official site oshlaw.app** : the link to the App Store carries source-tracking parameters, so downloads from the website can be separated out, but how many came from it is unknown.

- **LINE community** : an open group for the "OSH LAW" occupational-safety law quick-reference app, tagged with 30 or more tags (#Grade B admin #Type A business chief #occupational nurse #site supervisor #occupational safety exam). As of early November, the group had only 2 members.

No ads, no media coverage, and no one discussing it on X, Threads, Dcard, or PTT that I could find. Recommendations within the occupational safety Facebook groups and among colleagues may well exist, but they aren't visible from outside.

### Who it's competing with

| Competitors | What it is | How it differs |
|---|---|---|
| National Laws and Regulations Database, Ministry of Labor labor regulations search system | Official web pages, free | The most authoritative, but hard to use on a phone. The annexes are PDFs, with no plain-language explanations and no offline mode. |
| National Laws and Regulations Database 2025 (SuoData) | General law-reference iOS app, 932 ratings | Covers every law, not just occupational safety; lifetime VIP NT$27,000 |
| Lawyers, Faxue Fadian | iOS, for lawyers and exam takers | 8,705 / 361 ratings, and it lacks the on-site features occupational safety work needs |
| Occupational Safety and Health Facility Rules, Fully Illustrated | iOS, listed 2026-06, 3 ratings | Covers one law only: 250 illustrated diagrams + 100 quiz questions, one-time purchase at NT$390. Its reference chart rank moves between #29 and #194. |
| Certification question bank apps (Pro2e and others) | iOS / Android | Built for exam drilling, not for looking up regulations |
| General-purpose AI like ChatGPT | — | Can explain statutes, but may be wrong. No offline mode, and no guarantee it's the official current version. |

The one to watch is the "Facility Rules Fully Illustrated" app. It launched three months before this one, has no connection to it, was also built by one person, covers only one law, sells for NT$390, and also charted. Two unrelated people building this independently suggests the demand is real. So far, nobody is copying the "Occupational Safety Law Quick Reference" app.

### If it were you

**B. The playbook is copyable, and this particular app doesn't need copying.** The method: take a recently amended public regulation, find a group of practitioners who check it daily and whose employers reimburse the cost, and build an offline, plain-language, read-aloud phone tool that sells at a premium. Costs are low and it's worth a try. The weak points are also clear: every market is small, revenue is still just a handful of sales, the statutes themselves are public, and general AI keeps getting better.

**Who it's for** : people who work in a licensed trade themselves, or know someone who does (fire safety, construction, environmental protection, food hygiene, medical, tax), who know which laws they check every day and in what situations, and who can proofread plain-language explanations to the point where people will quote them. Also suits developers who read Japanese or Korean, to build Japan's 労働安全衛生法 or Korea's 산업안전보건법. Both markets are bigger than Taiwan's, and both countries revise their occupational safety rules often (inferred, not checked one by one).

**Who it's not for** : anyone hoping to make a living from one app. In Taiwan's occupational safety niche, the ceiling is probably a few dozen high-priced orders a month (estimate). It's also not for people outside the field who plan to batch-convert statutes into plain language with an LLM and ship. These users want content they can cite and that is accurate. One wrong explanation and the bad reviews come.

**How to build it** : first pick a domain with a major amendment in the past year whose effective date is still ahead or just passed. Verbatim text with a side-by-side plain-language explanation, offline first, annexes reformatted, and a clear effective-date countdown. Price it like this one: free preview, with annual and one-time options. Set the one-time price at a fraction of a certification course's cost, so people pay once. Users are already asking for desktop versions, so an iPad and Mac version can come early.

**How to get users** : name the app with the search terms practitioners actually type ("[X] Law Quick Reference"), and first win the App Store search ranking, the only channel confirmed to bring volume so far. Then go where this app isn't yet: certification prep schools and exam communities, "new law in effect" posts in industry Facebook groups and LINE groups, and group licensing for corporate safety departments. Search volume is probably highest in the one to two months around an amendment's effective date (inferred), so launch before then.

**Before when** : It depends on when the law you pick takes effect. The Taiwan occupational safety wave has a window from July through year-end 2026, and it's already mostly taken by this and "Facility Rules, Fully Illustrated." For a different domain or country, go by that market's effective date, and ship at least a month early.

**How to tell if this read is wrong** : ① If the "Occupational Safety Law Quick Reference" app still has fewer than 20 ratings in January of 2027 and keeps flickering on the chart, that means only a few people in this group are willing to pay. Moving to a smaller niche would only mean fewer. ② The official National Laws and Regulations Database releases a good offline app, or adds plain-language explanations. ③ Users start writing reviews saying "the plain-language explanation is wrong." That would show the category lives or dies on accuracy, which one person can't keep up with.

[iOS store page ↗](https://apps.apple.com/app/id6804362217)

**Research notes: competitor table, acquisition evidence, full research report**

Competitors

| Name | Where | Launched | Scale | How it differs from this one |
|---|---|---|---|---|
| National Laws and Regulations Database / Ministry of Labor Labor Law Search System | Web | Already existed | Official and free, valid across Taiwan | The official web pages are hard to use on mobile, annexes are PDFs, with no plain-language text, no offline mode, and no effective-date countdown |
| National Laws and Regulations Database 2025 (SuoData) | iOS | 2023-03 | TW 932 ratings, Reference free chart around #86–130 | General all-law app, not focused on occupational safety. Lifetime VIP NT$27,000 |
| Lawyers (SuoData) / Faxue Fadian | iOS | 2019-01 / 2012-12 | 8,705 / 361 ratings | A general statute library for lawyers and exam takers. No vertical occupational safety organization and no on-site features |
| Occupational Safety and Health Facility Rules, Fully Illustrated | iOS | 2026-06-17 | 3 ratings, TW Reference Top Grossing chart swinging between #29–194 | Covers one law only, with 250 illustrated diagrams + 100 quiz questions, one-time purchase at NT$390. The Occupational Safety Law Quick Reference app offers the full set of laws, plain-language explanations, and read-aloud, at 5 times the price. |
| Audio Occupational Safety and Health | iOS | 2019-06 | 21 rating | Read-aloud only, and dated. No plain-language explanations and no amendment tracking |
| Question bank practice apps for occupational safety management certification (Pro2e and others) | iOS | 2021 | iOS 112 ratings, Android 1.9 thousand installs | Built for exam question banks, not law lookup |
| Taiwan Occupational Safety Card (Occupational Safety and Health Administration) | iOS | 2019 | Android 22 thousand installs | A training-completion certificate card. Different function |
| General AI like ChatGPT | Big-company features | — | Huge | Can explain statutes but may be wrong. No offline mode, and no guarantee of verbatim official text or effective dates |

Where users come from

- **查实** **App Store 搜尋** :iTunes 台灣區搜「職安法」排第 1、「工安」第 2、「職業安全衛生」前 8;App 名即搜尋詞

- **Verified** **App Store "customers also bought" cross-recommendations** : the page recommends "Occupational Safety and Health Facility Rules, Fully Illustrated", "LONGEPASS Skills Certification Question Bank", and "Kao Ji Jian".

- **Verified** **Official site oshlaw.app** : the landing page's App Store link carries the attribution parameters pt=129346049&ct=web-home.

- **Verified** **LINE community** : the openchat "職安法速查APP (OSH LAW)" is tagged with 30+ labels, but has 2 members.

- Inferred **Ads/creators/X/Threads/Dcard/media** : none found.

## Occupational Safety Law Quick Reference (iOS id6804362217) research report

> Research date 2026-11-06. Data sources: our appstore database (chart_rank / app_day, from 2026-10-28), iTunes lookup/search API, the App Store Taiwan page, the official site oshlaw.app, the LINE community page, Jina web search, x-radar.

### In one sentence

A **offline occupational safety and health regulations app** built by Cheng Han Hsieh, an independent developer in Taiwan (the only app they've shipped). It covers 142 laws, roughly 5 thousand articles, with a plain-language explanation for each article, audio read-aloud, an effective-date countdown, and notes with highlights. Free to download, paid to unlock (Taiwan prices: monthly NT$160, annual NT$1,280, one-time NT$1,980).

**Bottom line** : it hasn't really broken out yet. It has 5 ratings and only ranks in Taiwan. Its chart run comes from **the Taiwan Reference category charts having a very low bar** , plus **a high price point** (one-time purchase NT$1,980). A handful of paid downloads is enough to push it into the top 40, and on one day it hit #12. The real thing to watch is the playbook: **a window opened by the Occupational Safety and Health Act overhaul (2026-07-01), a narrow vertical aimed at HSE (occupational health and safety) practitioners, and turning public regulations into an offline, plain-language, listenable professional tool that sells at a premium** .

### 1. Data: how big is it really

| Date | TW Reference Top Grossing chart | TW Reference Top Free chart | Overall rating |
|---|---|---|---|
| 10-28 | 96 | 154 | 4 |
| 10-29 | 118 | 157 | 4 |
| 10-30 | 153 | — | 4 |
| 10-31 | 180 | 164 | 4 |
| 11-01~11-03 | Not charted | 194 / 201 | 4 |
| 11-04 | 36 | 166 | 4 |
| 11-05 | **12** | — | 4 |
| 11-06 | 35 | 153 | 5 |

(Source: appstore database chart_rank, cc=tw, genre 6006)

- Ranked only in the Taiwan storefront. No Android version (not found in the googleplay database; the official site only links to the App Store).

- The free chart has sat between #150 and #200 for a long time, which means daily downloads are tiny (single digits to low teens, not verified).

- The Top Grossing curve is a classic "a few purchases" shape: it fell off the chart for three days, then 11-04 suddenly jumped back to 36, 11-05 to 12, and then 35. On the same day, the top ten of the Taiwan Reference Top Grossing chart were all translation apps, with MOJi Dictionary at 11 and NetEase Youdao at 13. Total paid volume in this category is small: a single NT$1,980 one-time purchase or a few annual subscriptions is enough to push a title into the top 20. My guess is that there were one or more high-priced purchases between 11-04 and 11-05 (exact count unverified).

- Ratings went from 2026-09-05 to 5 (average 4.8) since launch, and never moved from 10-28 to 11-05.

- Conclusion: revenue is probably in the range of a few to a dozen high-priced purchases a month, not a product that has really scaled. The recall scoring is picking up a chart illusion caused by a "small category + high ARPU" combination. But it does prove that HSE practitioners will pay NT$1,000–2,000 for a statute lookup app.

### 2. Why it took off (where the money came from)

1. **時機:職安法 2013 年以來最大修法 2026-07-01 上路。** 立法院 2025-12-02 三讀、2025-12-19 公布、2026-07-01 施行,同時 11 部子法一起上路,新增職場霸凌防治專章、強化營造源頭防災與承攬管理、提高罰鍰([勞動部新聞](https://www.mol.gov.tw/1607/1632/1633/93216/)、[職安署新修職安法專區](https://www.osha.gov.tw/48110/48713/207079/nodelist)、[ios.org.tw 三讀新聞](https://ios.org.tw/News/NewsContent/551))。App 2026-09-05 上架,描述裡特別寫「2026年7月職場不當行為修法上路,職場霸凌、職場性騷擾相關法規已同步收錄」,還有「施行日期與生效倒數」功能——直接打「法規剛改、要查新版本、要知道哪條什麼時候生效」的痛點。

2. **The target user is someone who has to look up regulations every day and whose company or wallet pays for it.** Occupational safety and health officers, business managers, occupational nurses, construction site supervisors, and people preparing for Class A/B safety certification exams (the LINE community tags are #乙級管理員 #甲種業務主管 #職護 #工地主任 #職安考試). The official slogan is "Written for HSE professionals who deal with regulations every day." For them, NT$1,980 is a one-time tool fee, far less than a certification course.

3. **There were almost no decent mobile tools before this.** One review: "Finally an OSH app ==" (2026-09-08). The official options were the web-based national law database and the Ministry of Labor law query system. On a phone you were stuck reading PDFs. General legal apps (SuoData's national law database / Lawyer's app) weren't built for occupational safety.

4. **Scenario-specific features done right** : no signal at construction sites or plants → 100% offline; wearing gloves or operating machinery → voice readout, lock-screen and earphone controls; appendix tables (e.g. training hour tables) were official PDFs → re-laid out as phone-friendly tables; colloquial terms and typos are searchable (v1.0.3).

5. **The developer ships fast and responds quickly** : 15 versions in 8 weeks since launch (1.0.1 9/8 → 1.1.3 10/30). One review: "Very quick to respond to feedback. Deserves 5 stars" (10-18). Another review: "Hope you release a desktop version. If you do, I'll buy the one-time purchase on the spot" (10-13). That's a signal that users would pay the one-time price.

6. **Reasons to retain and pay** : regulations keep being amended, and the App promises to "check content against the latest official published version," shows amendment history, and has effective-date countdowns. That makes it a subscription case. Notes, six-color highlighters, and bookmarks (1.1.3) let people treat it as "their own regulation book," which creates switching costs.

### 3. Where users come from (growth levers)

| Channel | Evidence | Confirmed |
|---|---|---|
| App Store search | iTunes 台灣區搜尋「職安法」排第 1、「工安」第 2、「職業安全衛生」前 8;名字本身就是搜尋詞「職安法」+「速查」 | Yes |
| App Store "customers also bought" cross-sell | Its page recommends "Full Illustrated Guide to Occupational Safety and Health Facilities Rules," "LONGEPASS Technical Skills Certification Question Bank," and "Technical Skills Exam Prep." That suggests buyers overlap with certification-exam and occupational safety tool users. | Yes |
| Official site SEO / landing page | oshlaw.app,App Store 連結帶 `pt=129346049&ct=web-home` 歸因參數;Jina 搜「職安法 白話 解析 App 離線」能搜到官網 | Yes (volume unknown) |
| LINE community | The "職安法速查APP (OSH LAW)" openchat is stacked with 30 tags for in-LINE search, but currently has **2 members** . | Yes, but almost no traffic |
| Word of mouth in the occupational safety circle (FB groups, between coworkers) | No public posts found. Presumed to exist, not verified. | No |
| Ads / influencers / X / Threads / Dcard / PTT / media | x-radar: "職安法" 0 posts in 90 days. Jina searches of Threads, Dcard, and PTT turned up no posts mentioning this App. No media coverage. | None found |

Bottom line: **current volume almost entirely comes from App Store search** (it owns the term "職安法"), plus search demand from the amendment. There is no external promotion.

### 4. Competitors

| Name | Where | Launched | Scale | How it differs |
|---|---|---|---|---|
| National Law Database (law.moj.gov.tw) | Web (official) | Already existed | Used by Taiwan's legal professionals and HSE staff | Free and authoritative, but hard to use on mobile, no plain-language explanations, no offline mode, appendices are PDFs |
| Ministry of Labor law query system (laws.mol.gov.tw) | Web (official) | Already existed | — | Same as above, plus interpretations and rulings; no plain-language explanations, no offline mode |
| Industrial Safety Association OSH regulation query system (law.isha.org.tw) | Web | Already existed | Small | Just a list of articles |
| National Laws and Regulations Database 2025 (SuoData) | iOS | 2023-03 | TW 932 rating, Reference free chart #86–130 | General full-law app, not focused on occupational safety; lifetime VIP NT$27,000 |
| SuoData (法律人) | iOS | 2019-01 | 8,705 rating | General law app for legal professionals and students, not aimed at workplace safety |
| Fayuan Fadian Big Six Code edition | iOS | 2012-12 | 361 rating | Legal professional database, not occupational safety |
| Full Illustrated Guide to Occupational Safety and Health Facilities Rules (Yu Shiung Jiang) | iOS | 2026-06-17 | 3 rating; TW Reference Top Grossing chart fluctuating between #29–194 | Covers only the Facilities Rules, pitched with 250 illustrations + 100 quiz questions at a one-time NT$390. It's its closest recent peer, and it proves people pay for this niche. |
| Audio Occupational Safety and Health (Chang Chih Kai) | iOS | 2019-06 | 21 rating | Just audio readouts, outdated |
| Occupational Safety and Health Management Certification Question Bank Practice (Pro2e) | iOS/Android | 2021 | iOS 112 rating; Android 1.9 thousand installs; TW Education Top Grossing #55–113 | Question bank for exams, not a law lookup tool |
| Occupational safety Class B question banks / Technical Skills Exam Prep / LONGEPASS | iOS | 2026 | Single-digit to low-teens ratings | Question bank category |
| Taiwan Occupational Safety Card (Occupational Safety and Health Administration) | iOS/Android | 2019 / 2022 | Android 22 thousand installs | A training-completion certificate card. Different function |
| osh-soeasy OSH law compilation PDF, YouTube "Golden OSH exam study notes" | Web / content | — | — | Free study material, not a lookup tool |
| General AI like ChatGPT | Big-company features | — | Huge | Can explain clauses but makes errors, no offline mode, no official version guarantee |

### 5. Differentiation

- **Vertical** : covers only four categories (occupational safety and health, labor inspection, labor insurance, labor conditions), following the official categories of the National Law Database. It is not a general legal app.

- **Official text side by side with plain-language explanations** : 4,760 current clauses explained clause by clause in plain language (presumably LLM-generated and proofread, not verified). It also stresses that the text is "reproduced verbatim from the official published version, never rewritten," giving both comprehension and citability.

- **Field scenarios** : 100% offline, voice readout (for when wearing gloves or operating machinery), re-laid-out appendix tables, colloquial search.

- **Amendment timeline** : effective dates, countdowns, and revision history, which fits the confusion between old and new versions after 2026-07 major amendment.

- **Personal workspace** : watchlists, custom categories, notes, six-color highlighters, bookmarks.

These differentiators are why people paid (reviews: "finally a proper HSE app", "bought the one-time purchase right away once the desktop version came out"), but it hasn't broken out at scale yet. The differentiation works; distribution hasn't been done.

### 6. Visibility and copycats

- **Barely known** : no press, X 0 posts, no mentions on Threads/Dcard/PTT, LINE community 2 members; only auto-generated Similarweb pages. Revenue not public.

- **Copycats: none** . "Full illustrated facility rules" launched earlier than it (2026-06), a parallel similar product, not a copy of it.

### 7. Lessons to borrow

1. **"Public regulations + vertical profession + amendment window" template** : find a group of practitioners who check a specific set of regulations daily and can expense the app (fire safety, construction, environmental, food hygiene, tax, medical, Japan's Industrial Safety and Health Act, Korea's 산업안전보건법), and launch right before or after a major amendment takes effect.

2. **Pricing** : niche professional tools don't need to be cheap for volume. NT$1,980 one-time / NT$1,280 per year both sell. Small-category Top Grossing charts have low thresholds, so a few sales can get you charted and bring extra exposure.

3. **App name = search term** : "職安法速查" ("Occupational Safety Act Quick Reference") takes the #1 search slot for "職安法" directly.

4. **Scenario features beat AI chat** : offline use, read-aloud, tables attached, effective-date countdown. ChatGPT can't do these.

5. **Fast iteration + replying to reviews** earned good ratings.

### 8. Unknowns

- Actual paying users and revenue (unverified how many purchases map to the Top Grossing ranking of 12).

- Whether the plain-language explanations are LLM-generated and how accurate they are.

- Whether there are invisible channels such as offline sales, Facebook groups, or internal company referrals.

- The developer's background (whether they're an HSE practitioner themselves) couldn't be confirmed.

- Whether retention and renewals hold up once the free period ends.

This article was written by AI from public data and the data we collect daily. Numbers are sourced, and inferences are labeled.