# "20 years old, why am I the only one taking this many pills every day": a cute medication log app that made the Japan top-grossing chart alone among 60 rivals · Mobile app

> Source: https://stringers.io/en/apps/ios_6790151136.html (Stringers / 什么值得做, generated 2026-11-08)
> Stringers answers one question every day: what small product can one or two people build in a few months and actually make money from. Numbers come from 15 databases we collect daily, each with source and date.
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> It gives young users of chronic-illness, psychiatric, and contraceptive medications an interface that doesn't feel like a chore and that they're happy to open every day. Looking good is the reason to pay. The developer ships updates almost daily, and good reviews keep piling up in the comments. Traffic comes from keyword-stuffed store search, and it arrived just as LINE's medication services started shutting down one by one.

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

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お薬のきろく - Medication tracker, reminders & missed-dose alarm (ANN KOROMOCHI) · ANN KOROMOCHI

# "20 years old, why am I the only one taking this many pills every day": a cute medication log app that made the Japan top-grossing chart alone among 60 rivals

**What it is** A Japanese medication reminder and dose-log app. Tap when you've taken a dose, it counts down your remaining pills, gives doctors a one-page summary at checkups, and has 100 cute themes. The free version allows up to 3 medications.

**Why it took off** It gives young users with chronic illness, psychiatric medication, or birth control a low-pressure interface they actually want to open every day. Looking good is the reason to pay. The developer ships updates almost daily, and reviews keep piling up praise. Traffic comes from store search stuffed with keywords, and it arrived just as LINE's medication services were shutting down one by one.

**B** **How you could follow** Don't compete with it head-on in Japan. Go to a market that also loves "cute" (Korea, Taiwan), or serve one niche (birth control plus period tracking, psychiatric meds plus mood). Copy its approach: cap the free tier by number of medications, put themes behind the paywall, and reply to reviews and ship updates constantly.

B grade: the playbook is clear and almost nobody knows about it. It wins on aesthetics and speed that followers can learn. But the ceiling is a few thousand dollars a month. Japan already has it and 60 similar apps, and it has already shipped in 18 languages, so the open slots in other markets could be taken by it. Almost nobody knows about it yet

Data (updated daily) · first listed 2026-07-20 · Japan rating 84 · charted in 11-08 of 1 stores

iOS · best category chart rank · by store

Data 2026-10-28 → 2026-11-07 (11 days, 8 observations). Lower rank is higher; gaps mean it wasn't charted that day

iOS · rating count · Japan

Data 2026-10-28 → 2026-11-07 (11 days, 8 observations). Apple doesn't publish download counts; rating growth is a proxy for downloads.

お薬のきろく is a medication log app built by indie developer July. In 2026 years, about 60 medication reminder apps launched on the Japanese App Store. It's the only one that reached the health top-grossing chart. It has only 84 ratings, yet its revenue rank already sits next to Habitify and Streaks. It didn't rely on paid acquisition. It made a stressful little chore look pretty and gentle, then shipped what users asked for within a day or two. This piece covers what it got right, where the money comes from, and whether you can copy it.

### A review from Oct 10

In 2026 Oct 10, someone on the Japan App Store gave it 5 stars with the title "ストレスだった服薬が少しだけ楽しくなった" (Taking medicine was stressful, now it's a little more fun). She wrote that her previous medication app worked fine, but "実用的な感じで、デザインに物足りなさ" (it felt purely practical, the design was lacking). Recently her symptoms worsened, she needed two doses a day, and she thought "20代なのに自分だけなんでこんなに薬ばっかり" (I'm only in my 20s, why am I the only one taking so many pills). Switching to this cute app "少し救われた" (felt a little rescued). Tapping "taken" makes a flower bloom on screen.

At the end of her review she asked for more pill colors. A few days later, a version added 22 colors.

These two things, people opening it every day because it looks good, and the developer building requests within days, are basically the whole story of how this app got where it is.

### What it is

On the Japan store it's listed as "お薬のきろく - 服薬管理・リマインダー・飲み忘れアラーム", credited to ANN KOROMOCHI, a personal account, launched 2026-07-20.

The features are ordinary: enter medication names and times, tap when taken; you can backfill a missed time; schedules by day, weekday, every N days, "take N days, rest N days", or as-needed; it counts remaining pills and alerts you when they're nearly gone; a period's log turns into a single page you can show your doctor; and a weather pressure forecast for people who care about how air pressure affects their body.

What's different is the packaging. The first line of the store page is "のんだら、タップするだけ" (Just tap when you've taken it), and the copy is almost all hiragana, so it reads softly. There are 100 dress-up themes with names like "和紙と藤", "クリームソーダ", and "金魚鉢". The recommended-for list includes a line: "毎日ひらく画面だから、見た目にもこだわりたい" (It's a screen you open every day, so I want it to look nice too). It also needs no sign-up, keeps records only on the phone, can hide medication names in notifications, and supports Face ID lock.

Here's how it makes money: the free version has ads and allows up to 3 medications. The paid version offers a monthly plan at ¥300, an annual plan at ¥2,400, and a one-time purchase. Prices range from ¥3,100 to ¥5,800 across several tiers, and it's also running a "期間限定" (limited-time) offer (App Store Japan, 11-06). Several tiers are live at once, which suggests it's testing prices.

### How big it is

| Date | Japan store rating count | Japan health & fitness top-grossing chart |
|---|---|---|
| 10-28 | 70 | Fluctuated between 128 and 188 |
| 11-06 | 84, 4.45 stars | #140 |

(App Store Japan, 10-28 to 11-06)

Ratings grew steadily: about 70 from July to late October, then 1 to 5 a day. No spike that suggests bought traffic.

The top-grossing chart is the interesting part. 11-06 It ranks #140, with cocorus meditation (139), Bevel (141), Habitify (130), and Streaks (148) right around it, all subscription products that have been around for years. Based on that health-category rank on the Japan store, I **estimate** monthly revenue at a few hundred thousand yen, roughly a few thousand dollars, **unverified** .

An app with only 84 ratings reaching that level means its paying conversion rate is very high.

It hasn't taken off in other stores. It launched in 18 languages, each with its own keyword-stuffed name. The Chinese store name is "吃药提醒·服药记录·药盒闹钟·用药管理·打卡·可爱主题", and the Korean one is "약 알림·약 먹는 시간·복약 기록·영양제·리마인더·알람". But the US, Chinese, and Taiwan stores each have only 1–3 ratings. Korea 11-03 and Vietnam 11-04 each made the health top-grossing chart once, then dropped off. The Android version launched in 25 July and had 245 installs by late October (Google Play, 10-31).

### Why this one and not the other 59

On the Japan App Store there are 137 apps with names containing 服薬, 飲み忘れ, お薬, or くすり. 60 of them launched 2026 years ago (くすりどき, 飲んだ?, MedTap, noco, PillTick, くすりずむ, and more). Most are indie projects with 0 to 17 ratings. These apps all have keyword-stuffed titles and similar features, and only this one reached the top-grossing chart.

**First, it found a group that feature-focused apps ignored.** Its core users are young women: people with chronic illness, people on psychiatric medication, people on birth control, people taking a pile of supplements. For them, taking pills is already a mental burden, and the existing medication apps are either tools pharmacies use to dispense prescriptions or products built around "nagging you until you take it". The words that keep recurring in reviews are "癒される" (healing), "優しい" (gentle), and "ふっと肩の力が抜ける" (I suddenly relax, 9-02), and "気分が落ち込んでいても開きやすい" (easy to open even when I'm feeling down, 10-27).

**Second, looking good is the reason to pay.** Changing themes, changing colors, and home-screen widgets all sit behind the paywall. "毎日使うものなので、気に入ったものにできて嬉しい" (I use it every day, so I'm glad I can make it something I like, 10-20 paying user). "使い始めから課金しちゃいました" (I paid from the moment I started, 9-09). People who take several medications or supplements at once find the free tier's 3 medications nowhere near enough.

**Third, iteration speed is marketing.** The requests and ship times that can be matched up in the reviews:

| What users asked for | Launched |
|---|---|
| Backfill a missed dose time (requested by 9-02) | Next day |
| Relax birth control continuous-use from 99 days to 120 days (9-16) | "Right away" |
| Custom items in the condition log (10-05) | Live |
| More pill colors (10-10) | Within a few days, 22 colors |
| Show which day of the course you're on (10-18) | "Reflected right away" |

The version number in the review section went from 8-20 to 1.6.0 to 11-06 to 2.2.0, with over 20 versions in three months. Users whose requests were met came back to leave good reviews. One wrote, "すてきな運営さんがいらっしゃるアプリなので…是非一度試していただきたい" (The developer runs a lovely app, so please give it a try). The review section became its sales page.

**Fourth, the privacy details.** No sign-up, no data on servers, and the notifications don't show drug names. One 11-05 review praised exactly that last point: 「見られたくない人もいると思うので」 (some people don't want others to see it). For people on psychiatric meds, that matters.

**Fifth, the timing.** LINE-based medication services are shutting down one by one: sai+ダイアリー 2026-08-31 closed, ニンラーロ服薬サポート 12-22 closed. 10-18 has a review that says it plainly: 「今まで利用していた服薬管理のLINEサービスが終了してしまうので、次に使えるものを探していたところこちらを見つけました」 (The medication-management LINE service I used has ended, so I was looking for something to use next, and found this).

### Where users come from

Mostly Japan App Store search. The title is 「服薬管理・リマインダー・飲み忘れアラーム」 with the subtitle 「のんだ記録と残薬・頓服・気分・体調メモ・通院前のまとめ」, which crams in nearly every term users search for. Reviews repeatedly say 「検索して」 and 「探していました」 (I searched, I was looking). The App Store 'Customers also bought' section is full of similar medication apps, which suggests they're all competing for the same search traffic.

The other channels I could see are all tiny. The TikTok account @okusuri_kiroku 10-25 only started posting, with 4 videos and 2 followers. Its 11-04 video has 12,386 views and only 14 likes, which looks like paid boosting (TikTok, 11-06). The others get a few hundred views. I couldn't find it in the Meta ad library, nothing on X, no press coverage. Whether it runs Apple Search Ads can't be checked from outside.

One 9-09 review is telling: this user had 「AIで自分用の簡単なチェックシートアプリを作成」 (used AI to build a simple checklist app for themselves), then searched the store because they had no notifications, and found this one. If users can build a basic version with AI, the function itself has little value. What's worth money is good design and someone who keeps maintaining it.

### Who it's competing with

| Product | Scale (Japan store, 11-06) | How it differs |
|---|---|---|
| 【公式】お薬手帳 (EPARK) | 215k ratings, #7 in free Medical | Pharmacy e-medication record, free and useful, no design effort |
| お薬記録&アラーム (Futasaji) | 6,270 rating | Largest independent medication reminder, mostly free, not near the top of Top Grossing |
| しつこいお薬アラーム | 1,217 ratings, #67 in category Top Grossing | Built around strong reminders. Earns more than this app, but its ratings have stalled (7 days +1) |
| MyTherapy | 4,395 ratings, #122 in category Top Grossing | German product, strong medical feel |
| pilme ピルミー | 110 ratings, 7 days +17 | Only covers contraceptives and periods |
| Apple's built-in Health app 'Medications' | Built into the system | Free, but no outfit changes and no visit summary |

It still earns less than the veteran しつこいお薬アラーム, but that one has stopped growing. It is the only new product in this niche that is both growing and making money.

There's also a risk: reviews already ask for a period calendar (11-03), and period apps like ルナルナ and ラルーン already include contraceptive reminders. If it expands in that direction, it will run into rivals with far larger user bases.

### How many people know about it now

Almost nobody. No public revenue, no press, zero discussion on X, 2 TikTok followers. The 60 similar apps each serve the same need on their own, and I see no sign anyone is copying it. The developer also made a fat-loss log app, a vlog editing app, and an Android diary app, none of which took off. It looks like they tried several categories and this is the one that hit.

### If it were you

**B.** Worth a try. This app shows that in an everyday utility category where anyone can build a clone and features are already similar, aesthetics and fast response can directly turn into paying users. But Japan already has it plus 60 similar apps. It has also set up 18 languages, but hasn't scaled yet. The ceiling is probably a few thousand dollars a month.

**Who it suits:** someone who genuinely feels the 'cute' aesthetic of a particular market. Ideally a female user's perspective, a native speaker of that market's language who can write warm copy that doesn't read like a translation, and who is fine with a small business earning a few thousand dollars a month and who will check reviews and ship updates every day.

**Who it doesn't suit:** people who want to win on features (features are easy to copy, and users can build them with AI); people who don't want to deal with users (half of its growth comes from the review section); people who want to pursue medical compliance and pharmacy integration, which is EPARK's territory as a large company.

**How to do it:**

- Switch markets: look at Korea and Taiwan first. Both are places where people pay for cute design. It has a name there but hasn't scaled, so this is the best time to move in. Competing head-on with it in Japan isn't worth it.

- Switch audience: serve one narrow group, such as contraceptives plus periods, psychiatric meds plus mood tracking, or heavy supplement users. It covers every kind of medication, so it can't be as precise as a niche product.

- Follow its structure: the free tier limits the number of medications rather than time; themes and colors sit behind the paywall; monthly, yearly and one-time purchase all available; data stored locally only; notifications can hide drug names.

**How to acquire users:** store search is the main channel. Fill the title and subtitle with the terms local users actually search (「吃药提醒」「漏吃」「剩余药量」「复诊」). Every time you ship a requested feature, say in your review replies which version it landed in. When a platform service like LINE shuts down, it creates a wave of users looking for a replacement, so watch the shutdown announcements on local platforms.

**When to move:** apps like this can be built with AI in a week or two, and a localized version could take off in some market at any time. If you're going into Korea or Taiwan, aim to launch before Q1 of 2027 so you can build reviews and word of mouth first.

**Signs you've misjudged:** ① Its Chinese or Korean version reaches the local health Top Grossing chart within 3 months, meaning it has taken the open slot in the new market itself; ② it drops out of the Japan Top Grossing chart by 200 places and its ratings stop climbing, meaning this wave of demand can't support subscriptions; ③ a second or third of the 60 Japan similar apps reaches Top Grossing, meaning the 'cute medication app' space is already crowded and aesthetics no longer differentiate.

[iOS store page ↗](https://apps.apple.com/app/id6790151136)

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

Competitors

| Name | Where | Launched | Scale | How it differs from this one |
|---|---|---|---|---|
| 【公式】お薬手帳 (EPARK) | iOS | 2015 | Japan 215k ratings, 7 days +474, #7 in free Medical | Pharmacy-ecosystem e-medication record, free and useful. It sells design and emotional comfort. |
| お薬記録&アラーム (Futasaji) | iOS | 2021-02 | 6,270 ratings, 7 days +47, #148 in free category | Largest independent reminder app, practical and free. It is on the Top Grossing chart while the other is not. |
| しつこいお薬アラーム | iOS | 2018 | 1,217 score, Top Grossing in category for 67,7 days, +1 | Feature-focused, built around strong reminders. This one leads with healing aesthetics and visit summaries. |
| MyTherapy | iOS | 2013 | Japan 4,395 ratings, #122 in category Top Grossing | A globally marketed German medical-feel product. It doesn't use Japanese-style cute design. |
| Medica(SPELLA) | iOS | 2023 | 172 ratings, #139 in category Top Grossing, not growing | Also a small paid app, but with a plain utility UI |
| pilme ピルミー | iOS | 2026-04 | 110 ratings, +17 in 7 days | Only contraceptives + periods. This one covers all medications. |
| 2026 saw about 60 new similar apps launch (くすりどき / 飲んだ? / MedTap / noco, etc.) | iOS | 2026-01 to 11 | Most rated 0–17 | Same keyword-heavy titles and features, but no aesthetic difference and no operational responsiveness |
| LINE-based medication services (sai+ダイアリー etc.) | Other | — | Shutting down one by one since 2026-08-31 | Closed, sending users back to the store. Reviews explicitly say they moved over from here. |
| iOS Health app 'Medications' | Big-company features | 2022(iOS 16) | Built into the system | Free, but no outfit changes, no visit summary, no barometric pressure forecast |

Where users come from

- **Verified** **Store search / ASO** : the Japan title and subtitle are stuffed with 服薬管理・リマインダー・飲み忘れアラーム・残薬・頓服; reviews say 「検索して…探していました」 (9-10); each store has its own keyword name, covering 18 languages

- **Verified** **Platform event: LINE medication services shutting down** : 10-18 review 「服薬管理のLINEサービスが終了してしまうので…見つけました」; sai+ダイアリー closed 2026-08-31, ニンラーロ服薬サポート closed 2026-12-22

- **Verified** **Review-section operations / word of mouth from fast iteration** : 3 months, 20+ versions (1.6→2.2); requests like backfilled entries, 120-day contraceptive cycles, 22 colors, and medication-day counts shipped within 1 to a few days, and users added positive reviews afterward

- Inferred **TikTok** : @okusuri_kiroku started posting 10-25, 4 videos, 2 followers; its 11-04 video has 12k views and 14 likes, likely boosted via Promote (TikHub 11-06)

- Inferred **Paid ads** : not found in the metaads library; Apple Search Ads can't be checked

## お薬のきろく (ANN KOROMOCHI): why it works

> Data: appstore / googleplay / metaads libraries (agent-im server, data as of 2026-11-06); App Store Japan pages and review RSS (scraped 2026-11-06); TikHub (TikTok); x-radar; Jina search. Storefronts checked: all regions scanned in the library, but only jp has real ratings and sustained chart presence. kr (11-03) and vn (11-04) each appeared once on the health Top Grossing chart.

### One line

A Japan-store medication logging and pill-reminder app, launched 2026-07-20, by independent developer ANN KOROMOCHI. Its pitch is 'pretty and gentle': 100 outfit themes, soft copy with lots of hiragana, a flower that blooms as you log doses, plus sign-up-free use, data stored only on the phone, a one-page visit summary, and barometric pressure forecasts. The free version has ads and caps registration at 3 medications. The paid version offers monthly ¥300, yearly ¥2,400, and one-time ¥3,100–5,800 (several price points, so they're clearly testing prices).

### Verdict

In Japan this category saw about 2026 new pill-reminder apps launch in 60 (mostly indie developers, probably AI-assisted), and this is the only one that has held a steady spot on the health Top Grossing chart. The reason isn't paid acquisition or social buzz. It's the product itself: the target users are young women and people on chronic, psychiatric, or contraceptive medication, who find existing apps 'too practical and oppressive.' It turns this everyday utility into something healing, and the developer ships almost daily. Requests go live within a day or two, and reviews keep praising that, so ratings and willingness to pay followed. Traffic mostly comes from Japan store search, with keyword-stuffed titles (服薬管理・リマインダー・飲み忘れアラーム).

### 1. Data

- Ratings: 84 in Japan, 4.45 stars (App Store lookup, 11-06). appstore library: 10-28 was 70, 11-06 was 82, 7 days +10, 1–5 per day. From launch in Jul 20 to Oct 28 it accumulated about 70 ratings, with steady growth and no spike from a push.

- Chart: on the Japan Health & Fitness Top Grossing chart, 6013 between 10-28 and 11-06 it ranged from #128–188, and on 11-06 it ranked #140 (appstore library app_day). On the same day, its neighbors included established subscription apps like cocorus meditation (139), Bevel (141), Habitify (130), and Streaks (148). That means an app with only 84 ratings is earning in the same range as those veteran habit and health subscription products. Based on the bar of #140 in Japan's health category, **inferred** monthly revenue is in the hundreds of thousands of yen (a few thousand dollars), **unverified** .

- Other storefronts: kr 11-03 charted #114 in Health & Fitness Top Grossing (3 ratings); vn 11-04 charted #148 (0 ratings). Each only appeared once. The us, cn and tw versions each have only 1–3 ratings. 18 languages, each store with its own name: the Chinese name is 「吃药提醒·服药记录·药盒闹钟·用药管理·打卡·可爱主题」 (Medication Reminder · Dose Log · Pill Box Alarm · Medication Management · Check-in · Cute Themes), the Korean name is 「약 알림·약 먹는 시간·복약 기록·영양제·리마인더·알람」. ASO is spread across all stores, but only Japan is getting traffic so far.

- Android: com.annkoromochi.kusurito, listed 2026-07-25, 245 installs, in-app purchase prices $0.59–49.99, with ads (googleplay library, 10-31). It hasn't really taken off.

- Versions: the version numbers visible in reviews went through more than 20 releases over the 2.2.0,3 months from 8-20 to 1.6.0 to 11-06 (from the im:version field in the App Store review RSS feed).

### 2. Competitors

| Product | Where | Launched | Scale (JP store, appstore library 11-06) | How it differs |
|---|---|---|---|---|
| 【公式】お薬手帳 (EPARK) | iOS | 2015 | 215k ratings, 7 days +474, #7 Medical free | An e-medication record with pharmacy and points integration, free, riding the pharmacy ecosystem; no design focus. |
| お薬手帳プラス (Nihon Chouzai) / いつでもアイン薬局 and other chain pharmacy apps. | iOS | 2015–2021 | 28k / 15k ratings | Pharmacy prescription sending and pickup tools; the pill reminder is just a side feature. |
| お薬記録&アラーム (Futasaji) | iOS | 2021-02 | 6,270 ratings, 7 days +47, #148 in free category | The largest standalone medication reminder, mostly free and practical. It has more downloads but isn't near the top of the charts. |
| しつこいお薬アラーム (flickfrog) | iOS | 2018 | 1,217 ratings, category Top Grossing 67 | Built around strong reminders that keep nagging until you take your meds. Functional. It earns more than this app, but its ratings have stalled (7 days +1). |
| MyTherapy | iOS/Android | 2013 | Japan 4,395 ratings, #122 in category Top Grossing | A German global product with a strong medical feel. |
| Medica(SPELLA) | iOS | 2023 | 172 ratings, category Top Grossing 139 | Another small paid reminder app. Also stalled. |
| pilme ピルミー | iOS | 2026-04 | 110 ratings, +17 in 7 days | Only covers birth control pills plus period tracking. It covers all medications, and users on birth control (reviews mention needing 120 days of continuous dosing) also use it. |
| ルナルナ / ラルーン | iOS | 2010–11 | 58k / 46k ratings | A period tracker with a birth control reminder. Reviews ask for period logging to be added. |
| 2026 new similar apps in about 60 (くすりどき, 飲んだ?, MedTap, noco, PillTick, くすりずむ, お薬日記……) | iOS | 2026-01 to 11 | Most ratings fall between 0 and 17. | Same need, same keyword-stuffed titles, mostly indie or AI-generated. It has the top rating among them and is the only one that stays on the charts. |
| Ended LINE medication services (sai+ダイアリー, closed 2026-08-31; ニンラーロ服薬サポート, closed 2026-12-22). | Other | — | — | One user's words: "The LINE medication service I used is shutting down, so I found this" (10-18 review) |
| The built-in iOS Health app's Medications feature. | Big-company features | iOS 16(2022) | Built into the system | Free and system-level, but no theming, no appointment summaries, no pressure forecast. Users still install a separate app. |

In the full app table of the library, Japanese-named apps containing 「服薬 / 飲み忘れ / お薬 / くすり」 total 137. 60 of them are from 2026 (appstore library, app table). It's a red ocean, and this app pushes through by product.

### 3. Where users come from

- **商店搜索 / ASO(主渠道,推断有强证据)** :日区标题「お薬のきろく - 服薬管理・リマインダー・飲み忘れアラーム」、副标题「のんだ記録と残薬・頓服・気分・体調メモ・通院前のまとめ」,把服药管理、提醒、闹钟、残药、顿服、复诊这些搜索词都塞满了。评论里有用户写「检索して…このアプリを探していました」(9-10)、「次に使えるものを探していたところ見つけました」(10-18)。App Store 的「顾客也购买了」列出的全是同类服药 App,说明它和同类共享同一批搜索流量。用 iTunes Search API 搜「お薬手帳」它排第 28;其他关键词的排名接口被限流,没查到。

- **Platform event / old-user migration (evidence found, scale unknown)** : LINE medication services are shutting down, including sai+ダイアリー (2026-08-31) and ニンラーロ服薬サポート (2026-12-22), and LINEドクター 2025-06 has already stopped. 10-18 review says directly that they came over from the LINE service.

- **TikTok (just starting, tiny)** : account @okusuri_kiroku started 10-25, 4 posts total, 2 followers. The 11-04 post got 12,386 views and only 14 likes, looking like a Promote boost. Other posts had only 147–183 views (TikHub, 11-06). Little impact on rating growth so far.

- **Reputation / review-section management** : the developer replies to nearly every review, typically saying the change is already in the latest version. Requests that went live after reviews include: logging doses after the fact (done the next day, 9-02), birth control 120 days (9-16), custom health-metric items (10-05), 22 pill colors (10-10 request, live within days), and showing which day of the course you're on (10-18). Those users then post follow-up praise, creating a loop.

- **Not seen** : Meta Ad Library doesn't include it (metaads library app_link query for 6790151136 and the Android package name both returned 0; the library only tracks listed products, so no result doesn't mean no ads); x-radar: 120 posts in the last 0 days; no press coverage; Apple Search Ads can't be checked.

### 4. Why it took off

1. **Found an audience and emotional need that functional apps ignore** : reviews say 「今まで使っていた服薬管理アプリ…実用的な感じでデザインに物足りなさ」, 「20代なのに自分だけなんでこんなに薬ばっかり…可愛いこのアプリに少し救われた」 (10-10), and 「ふっと肩の力が抜ける」 (9-02). Taking medication carries emotional weight for young users with chronic illness, psychiatric conditions, or on birth control. The app turns it into a healing little ritual: check-ins that bloom flowers, hiragana copy, washi and wisteria, cream soda themes.

2. **Looks drive payments directly** : themes are the core of the paywall (「色味も課金すると変えられる」, 11-05). Users say 「使い始めから課金しちゃいました」 (9-10) and 「毎日使うものなので気に入ったものにできて嬉しい」 (10-20). In medication apps, "the screen I open every day should look good" is a reason to pay.

3. **Free tier capped at 3 medications + ads, a clear paywall** : people taking several medications or supplements hit the limit without paying. Prices range from ¥300/month to a ¥5,800 one-time purchase, with a 「期間限定」 one-time price, so they're testing price points.

4. **Iteration speed used as marketing** : 3 months, 20 updates. Requests ship within a day or two, and the review section works as its sales page.

5. **Privacy and worry details** : no sign-up, data stored locally, medication names can be hidden in notifications (「見られたくない人もいる」, 11-05), Face ID lock. These matter a lot for users on psychiatric medication.

6. **Timing** : LINE medication services are closing one by one, sending older users back to store search, right as this app launched.

### 5. Differentiation: is that why it took off?

Differentiation = aesthetic and emotional design (100+ themes, gentle copy) + privacy + features suited to Japanese chronic-illness users like appointment summaries and pressure forecasts + very fast response. The core features (reminders, logging, leftover counts) are easy for anyone to build, and most of the 2026 similar apps from 60 also have them. **What really sets it apart is 'pretty enough to pay for' and 'a developer who responds like a friend'** . Those two show up directly in payments and ratings, which is why it took off. ASO just got it seen; the rivals' titles are equally stuffed with keywords, but they didn't take off.

### 6. How many people know about it

Few people know about it yet: no public revenue, no press, 0 posts on X, the TikTok account has 2 followers. There are many new similar products, all parallel builds for the same need, with no sign anyone copied it specifically.

### 7. What others can learn

- In a 'open-every-day' category dominated by free big-company tools or functional apps, build a healing / theme-driven app and put themes behind the paywall. Japanese women have a high willingness to pay for 「かわいい」.

- Keyword-packed localized titles, a separate name per store, 18 languages launched at once.

- Review section used as support and marketing: replies state 'already done in version X', turning them into follow-up praise.

- Free tier limited by count (3 medications) rather than time, with monthly, annual and one-time prices running at once to test pricing.

### 8. Still unclear

- Real revenue: converting the #140 Top Grossing rank into dollars is only an inference.

- Its actual search ranking for the keywords (the API was rate-limited); whether it runs Apple Search Ads.

- Who the developer is: ANN KOROMOCHI is a personal account. Other apps include CalMemo (2025-12), a Vlog editor (2026-09), and an Android diary app (com.annkoromochi.ours). None of those took off (ratings 0–2). It looks like they tried several categories, and this one hit.

- Can it be copied to other stores: the Chinese, Korean and English versions are all listed, but haven't gained traction yet.

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