A one-person Taiwan app after work: a CapCut alternative that doesn't steal your data. Free, offline, tip-only, hit #1 overall in Taiwan
What it is A mobile video editor built by one Taiwanese engineer after work: curve-based speed ramps, on-device auto subtitles, automatic face blurring. Everything runs on the phone. No login, no upload, no ads, free, tip-only.
Why it took off After CapCut's terms-of-service and security controversies in 2025, Taiwanese users wanted a local alternative. The story "made by a Taiwanese, built to keep his girlfriend's footage safe, works in airplane mode," plus users digging up the developer's background, spread on Threads without any push. The Android version is riding the afterglow of that iOS word of mouth.
CHow you could follow Don't copy the editor, copy the positioning: in a market wary of foreign apps, build a small-feature tool that's "made by locals + on-device AI, no upload, no login." Explain in the local community, under your real name, why you built it, and respond fast to feature requests. If you want revenue, go one-time purchase.
- Data (updated daily) · first launch 2026-10-18 · 11-07 installs 1,460
Android · Total installs worldwide Data 2026-10-29 → 2026-11-07 (10 days, 10 observations). Google's detail page only refreshes install counts every other day, so a flat day doesn't mean nobody installed.
Hanpo, an iOS engineer in Taipei, built a phone video editor after work called "Suila 水啦": no sign-up, no ads, editing, auto subtitles and face blurring all done on the phone, with no video uploaded. The iOS version launched in June and, on word of mouth from Taiwan's Threads, reached #1 on the Taiwan App Store free overall chart in August. The Android version only hit Google Play in October, and by Nov 6 had 1,460 installs and was already sliding. It's worth a look because it shows that "trust" can be the selling point. Trying to copy it for money is hard.
A post with 40k views
On Jun 26, 2026, Taiwanese Threads user @blog.mixflavor ("綜合口味") posted: "I want to recommend an 'offline editing app' I really admire, called 'Suila'." She wrote that the developer's motive seemed to be "keeping his girlfriend off any editing software with security risks (won't name which country or which app)", so Suila is fully offline and "works in airplane mode."
She then dug into the developer's background: an iOS engineer at hardware security firm KeyXentic, formerly a design director, who taught animation at National Chengchi University, won App Store "Best" and "Featured" awards, and built the interface for AirSig air signatures. Her conclusion: "This isn't a hobby project, it's the crystallization of over a decade of real native skill." In a reply she added: "I don't know this person, and this isn't a friendly plug or a paid one."
The post got 42.4k views, 1,800 likes and 680 reposts. The same day, another user wrote just one line: "Taiwanese-made editing app, if you don't want to use China's CapCut, switch to this one." Designer @akartworks listed seven strengths, the seventh being "Developer updates actively (important ❗️)," and honestly noted a drawback: adjusting the frame "lags a little." The most common comment was "Hope there's an Android version."
What it is
A lightweight editor for short videos. The official site's headline says it all: "Free・Made in Taiwan," with a line below: "No personal data collected, no ads, no tracking." It doesn't chase features. It picks the ones short-video creators use most:
- Curve-based speed ramps, which the developer calls his "signature";
- Auto subtitles, on-device speech recognition, with bilingual subtitles and SRT import/export;
- Automatic face blurring, frame-by-frame tracking that blurs every bystander, with one tap to keep the main subject;
- Import your own fonts, with built-in safe-zone guides for Reels / TikTok / Shorts.
The name comes from "水啦", what a foreign band was taught to shout when it played Taiwan. It feels local and is easy to remember. In the official site's FAQ, the developer says he originally just wanted an editor with "no sign-up and no annual subscription" that could crop and do curve speed changes. He couldn't find one he liked, so he built one: "It's really just something I spend a bit of time on after work."
Why Taiwan, and why now
On features, it can't beat CapCut international or Instagram's Edits. They're free too, and have far more templates. What it sells is trust, in three layers:
- No login, no upload, no collection. The privacy policy says it collects nothing. On-device AI makes that affordable: subtitle and face detection run on the phone, so there's no server bill.
- Built by a Taiwanese. In June 2025, CapCut revised its terms of service, and the license clause sparked controversy (reported by INSIDE). Later, Taiwan's army was questioned over security for using CapCut to edit videos (Economic Daily News). Taiwanese users were already wary of Chinese editing apps; what they lacked was a smooth local alternative. Nearly every recommendation post says "I don't want to use China's CapCut."
- One person, no commercial motive. The developer's credibility was vouched for by netizens, which makes the privacy promise hold up. His girlfriend also kept posting updates on Threads as "the boyfriend who develops it solo." In July, Taiwanese phone dealer Jiesheng Telecom wrote a long review calling him "the strongest tech-world representative of spoiling a girlfriend."
The product also kept pace with the traffic: it went from 1.0 to 1.15.0 in only 4 months. Fade in/out and other features users requested were added within days. The iOS Taiwan storefront has 309 ratings, averaging 4.9 (App Store, 11-06).
No ad buys have turned up. The official account bio reads "Solo developer, low-key operation." Distribution came from organic Threads reposts, then Facebook groups (Apple Jen), Instagram Reels, the developer's own YouTube tutorial shorts channel, and that dealer review. Almost nobody on X mentioned it, and outside Taiwan almost nobody knows it.
The Android version: the afterglow of one announcement
Google Play requires new developer accounts to get 12 testers to test continuously for 14 days before publishing. In Sep 15, the official Threads account (1,190 followers) posted a call for testers, with 1,200 likes and "spots filled up quickly." The gate doubled as a warm-up. In Oct 21 it announced the Android release, with 916 likes and 186 reposts. The post said: "I only have one Pixel, there must still be bugs I haven't caught," and required Android 14 or later.
The numbers since then:
| Date | Google Play cumulative installs | Taiwan, Video Players & Editors, Free chart |
|---|---|---|
| 10-29 | 954 | 42 |
| 10-31 | 1,221 | 51 |
| 11-02 | 1,396 | 55 |
| 11-05 | 1,434 | 59 |
| 11-06 | 1,460 | 68 |
The first 8 days brought about 950 installs, basically the announcement effect. After that it was only 20–40 a day, with rank steadily falling, and it has charted only in the Taiwan storefront. Play still has no ratings or reviews. The iOS side has also passed its peak: ratings rose from 299 at 10-28 to 307 at 11-06, about 1 a day, and it currently ranks #95 in Taiwan's Photo & Video category at best, not on the overall chart. Based on rating counts, lifetime iOS downloads are probably in the tens of thousands (est.). The Taiwan free overall chart is not a high bar: an app with 300 ratings reached #1, which shows that the August wave of downloads was concentrated in just a few days.
Where the money comes from: tips only
No ads, no subscriptions, and every feature is free for everyone. From version 1.9.0 it added "Support the developer": you can buy the developer a coffee from the settings page or after an export finishes, as a one-off or monthly, and it unlocks no features. The $0.99–$18.99 in-app purchases shown on Google Play are the tip tiers, and the official site also links a ECPay sponsorship page. The developer says the donations "will go toward dev costs such as the Apple Developer Program annual fee." Revenue isn't public, and judging from the design, it isn't going to be large.
The developer has explicitly said, "There will be no ads, because showing ads means taking users' information." So the free model is not a growth tactic. It is the selling point itself, and there are no plans to charge later.
Who it's competing with
| Product | Scale | Compared with Suila |
|---|---|---|
| CapCut (ByteDance) | Google Play 2.06B installs; Taiwan iOS Photo & Video #1 | Features and templates crush Suila; its terms and security controversies are exactly the target of Suila's story |
| Edits(Instagram) | Google Play 132M installs; Taiwan iOS category #6 | Also free with no watermark, but requires an IG account and goes through the cloud |
| InShot | Taiwan iOS 258k ratings | Ads plus subscriptions. Suila sells precisely the absence of those |
| PowerDirector (CyberLink, a Taiwanese company) | Google Play 144M installs | Also "Made in Taiwan," but it's a subscription commercial product |
| VLLO (Korea) | Taiwan iOS 8,520 ratings | The benchmark for simple editing, sold as one-time purchase or subscription. Some users suggest Suila copy its interface |
| Xiaoying / Meitu / Wink | Taiwan iOS Xiaoying 114k, Meitu 193k ratings | Chinese vendors, the opposite of Suila in the security narrative |
| iMovie / Google Photos | Built into the system | Also free and local, but with no auto subtitles, curve speed ramps or face blurring |
No direct copycat product has turned up. In Sep 25 the official Threads account warned about "suspected piracy" and told people not to download from unknown sources. It then said that after checking with users, "to avoid misunderstanding," it had deleted the original post. Whether there are knock-off installers has not been settled.
If it were you
Verdict: There's something to learn, but following it isn't worth it. It worked because of three things followers can't take: a market that is especially sensitive to Chinese apps, the CapCut controversy of 2025, and a developer whose reputation was vouched for by users. It also doesn't make money to begin with, tips only. Video editing is a CapCut-level red ocean, and building an editor good enough to use is months of native development on its own.
Who it suits: Individual developers who already do native iOS / Android work, have on-device AI experience (speech recognition, face detection), and want a word-of-mouth piece to build a name. Or people in a market wary of data flowing to foreign apps who have local identity and community credibility.
Who it doesn't suit: Anyone aiming to earn subscription money from an editing app, anyone without a local identity or a clear "why me" story, and anyone who wants to take a "privacy-first CapCut" head-on in the English market.
How to do it: Don't copy the editor. Copy the positioning formula: "made by locals + on-device AI, no upload + no login." Pick one specific sensitive scenario and one local language, and build only three to five high-frequency features (like dialect subtitles, auto blurring, local fonts). Make "no upload" a promise users can verify. Working in airplane mode is the best demo. On-device models have no server cost, so a free or very cheap one-time price is viable. If you want revenue, follow VLLO's one-time purchase rather than relying on tips alone.
How to acquire users: Follow its path without paying for ads. On the most active local community platform (Threads, in Taiwan), explain under your real name why you built it and lay out your background. Respond quickly to feature requests so that "daily developer updates" becomes the story. Use Play's "12 testers for 14 days" new-account requirement as a recruitment event. Shoot a few dozen seconds of tutorial video for YouTube Shorts and Reels.
When to move: There's no clear window. It rode the 2025 controversy, and that emotion will fade. If something similar is happening in your market (a foreign app restricted, a terms-of-service row sparking outrage), ship something usable within the few months while the news is still hot.
Where this could be wrong: ① Suila's Android version had passed 10k installs by January 2027, or charted in markets beyond Taiwan. That would show a "trust-based free tool" can travel beyond a single market, more than it looks. ② If the developer starts charging (subscription or one-time purchase) and Taiwan ratings keep rising, the positioning can monetize, and it's not just a word-of-mouth piece.
Research notes: competitor table, acquisition evidence, full research report
- Competitors
Name Where Launched Scale How it differs from this one CapCut iOS 2020 Play 2.06B installs; Taiwan iOS Photo & Video #1 Far more features and templates than Suila, but it's a ByteDance product with terms and security controversies. Suila exists to replace it Edits(Instagram) Big-company features 2025-04 Play 132M installs; Taiwan iOS category #6 Free like the rest, but needs an IG account and runs in the cloud; Suila has no login and works offline InShot iOS 2015 Taiwan iOS 258k ratings Ads plus subscriptions; Suila has no ads and no subscriptions PowerDirector (CyberLink) Android Around 2013 Play 144M installs Also made by a Taiwanese company, but it's a subscription commercial product; Suila is one person's free project VLLO iOS 2015 Taiwan iOS 8,520 ratings The benchmark for simple editing; requires a one-time purchase or subscription; users suggest Suila copy its UI Xiaoying / Meitu / Wink iOS 2011–2013 Taiwan iOS Xiaoying 114k, Meitu 193k ratings Chinese vendors, the opposite of Suila in the security narrative logus iOS 2026-04 Taiwan iOS 247 ratings A light editor that launched around the same time, focused on templates, doesn't talk about privacy iMovie / Google Photos editing Big-company features Early on Built into the system Also free and local, but with no auto subtitles, curve speed ramps or face blurring Concat Open source 2026 Covered by Taiwanese tech media Also pitched as a CapCut replacement, but desktop only - Where users come from
- Verified Organic word of mouth on Threads: @blog.mixflavor 2026-06-26's recommendation post 42.4k views, 1.8K likes, 680 reposts, stating it's not sponsored; @chipher, @akartworks and others followed up
- Verified The developer's girlfriend persona: @beouter kept posting updates framed as "her boyfriend, a solo developer"; a Jiesheng Telecom article calls the author the "top boyfriend who spoils his girlfriend"
- Verified Official Threads account: @suila.app (1,190 followers) 09-15 recruited Play closed-test participants; 1.2K likes, spots filled fast; 10-21 announced the Android launch, 916 likes
- Verified FB groups, IG Reels, YouTube Shorts, reseller content: the Apple Almond FB group, a Jiesheng Telecom 2026-07-21 review, and the developer's @SuilaApp tutorial Shorts
- Inferred chart exposure after breaking into the overall Top Free chart: the official site says 2026-08 hit #1 on the Taiwan Top Free overall chart and #1 in its category for several days; our database has no August data
- Inferred Paid ads: none found; the author says they run it "low-key"
Suila 水啦 (co.hanpo.suila): research report
Date: 2026-11-06 | Channel: Google Play (the iOS version is the main battleground)
One line
A Taipei iOS engineer and designer (Hanpo Cheng) built a mobile video editing app solo after work: completely free, no login, no ads. Editing, auto-subtitles and face blurring all run on-device, funded only by tips. The iOS version launched 2026-06-23, went viral on Threads in late June, and hit #1 on Taiwan's App Store free overall chart in August. The Android version only launched on Play 10-21 (official announcement 2026-10-18) and now has 1,460 installs, still growing.
Verdict
It took off on a story: "A CapCut alternative made by Taiwanese people that doesn't steal your data." That story landed right on Taiwanese users' security concerns about Chinese editing apps and spread through organic word of mouth on Threads. The Android version simply extended the iOS buzz. Play numbers show no new growth logic: about 8 installs in the first 950 days, then only 20–40 a day, with its Taiwan category rank falling from 42 to 68.
Data
- Play (googleplay database): installs 954 (10-29) → 1,221 (10-31) → 1,396 (11-02) → 1,434 (11-04) → 1,460 (11-06); AppstoreSpy estimates daily installs dropped from 58 to 19–26. Taiwan VIDEO_PLAYERS free chart rank: 42 (10-29) → 47 → 51 → 52 → 55 → 59 → 63 → 59 → 68 (11-06), charted in Taiwan only. No rating data and no reviews captured.
- iOS (appstore database + iTunes lookup): id6781609534,2026-06-23, 309 ratings in the Taiwan store averaging 4.90, version 1.15.0 (released 2026-10-30), requires iOS 26+. Rating count 299 (10-28) → 307 (11-06), about 1 a day, so the buzz has clearly passed its peak. Current best rank in Taiwan's Photo & Video category is 95, not on the overall chart. The Macau store has 2 ratings.
- Hit #1 on the overall chart in August: the official site says "#1 on Taiwan's App Store free overall chart, 2026 August" and the FAQ adds "hit #1 in its category for several days" (https://suila.app/). Our database starts 10-28, so we can't verify this independently. Taiwan's free overall chart has a low bar: 309 ratings is enough to reach #1, which suggests downloads were concentrated in a very short window.
- Monetization: no ads, no subscriptions, all features free. From 1.9.0 there's a "Sponsor the Developer" option, one-time or monthly, which unlocks nothing (official FAQ). The $0.99–18.99 tiers on Play are just tip levels. The official site also links a ECPay sponsorship page. Revenue is not public.
- Other apps from the same developer (App Store developer page id474403225): Suila VR (launched 2026-09-22, plays your own 360° videos, also "nothing uploaded"), Tobu jump-timer camera, and earlier work. The official site also has a "sticker workshop" sticker pack community.
Competitors
| Product | Where | Launched | Scale | How Suila differs |
|---|---|---|---|---|
| CapCut (CapCut international) | iOS/Android/web | 2020 | Play 2.06B installs; Taiwan iOS category #1, overall #57; Taiwan Play video category #2 | Far more features and templates than Suila, but it's a ByteDance product; in 2025 June its terms of service sparked authorization controversy, and when Taiwan's army used CapCut for editing it drew criticism. Security concerns like these are exactly the target of Suila's pitch. |
| Edits(Instagram/Meta) | iOS/Android | 2025-04 | Play 132M installs; Taiwan iOS category #6, 5,551 ratings | Also free with no watermark, but needs an IG account and runs in the cloud; Suila sells "no login, works offline" |
| InShot | iOS/Android | 2015 | Taiwan iOS 258k ratings | Ads plus subscriptions. Suila sells precisely the absence of those |
| PowerDirector (CyberLink, a Taiwanese company) | iOS/Android | Around 2013 | Play 144M installs; Taiwan Play video category #13 | Also "Made in Taiwan", but it's a subscription, feature-rich commercial product; Suila is one person's free, low-key project |
| VLLO (Korea, vimosoft) | iOS/Android | 2015 | Taiwan iOS 8,520 ratings | The benchmark for simple editing; Threads users suggest Suila copy VLLO's UI; requires a one-time purchase or subscription |
| Xiaoying / Meitu Xiuxiu / Wink (China) | iOS/Android | 2011–2013 | Taiwan iOS Xiaoying 114k ratings, Meitu 193k ratings; Wink on Play 61.2M installs | Also Chinese makers, and the opposite of Suila's pitch in a security-focused narrative |
| logus(EMMO) | iOS | 2026-04 | Taiwan iOS 247 ratings | A light editor launched around the same time, pitched on setlog / minivlog templates, doesn't talk about privacy |
| iMovie / Google Photos editing | Big-company features | Early on | Built into the system | Also free and local, but lacks short-video features like auto-subtitles, curve speed changes and face blurring |
| Concat | Open source (desktop) | 2026 | Covered by Taiwanese tech outlet kocpc | Also pitched as "no need to use Jianying anymore", but desktop only |
Data sources: appstore database, googleplay database (2026-11-06); kocpc.com.tw, inside.com.tw, money.udn.com.
Growth tactics (ranked by strength of evidence)
- Organic word of mouth on Threads (confirmed, main channel): 2026-06-26, @blog.mixflavor posted recommending "offline editing app Suila", explaining the origin story: "so my girlfriend wouldn't use a risky Chinese editing app", and digging up the author's background (KeyXentic iOS engineer, featured on the App Store, UI work on AirSig). The post got 42.4k views, 1.8K likes and 680 reposts, with the author stating "I don't know this person, no sponsorship". Around the same day @chipher posted "Taiwanese-made editing app, switch to this if you don't want Jianying". @akartworks posted several threads with feature reviews, praising the author's "daily updates" and suggesting improvements.
- The author's girlfriend @beouter keeps running the account (confirmed): posting updates as "her boyfriend, a solo developer" (for example, when 1.5.3 added a fade in/out feature a user requested), and sharing life updates on typhoon days. The core spread narrative is the "engineer who spoils his girlfriend" persona (the Jiesheng Telecom article calls him the "top boyfriend who spoils his girlfriend in tech").
- Official Threads account @suila.app (1,190 followers): 2026-09-15 posted recruiting Play closed-test participants, because new developer accounts need 12 people testing for 14 consecutive days before launch. The post got 1.2K likes, and "spots filled up fast". 2026-10-21 announced the Android launch, 916 likes and 186 reposts. The roughly 950 installs in Play's first week came mainly from this post.
- Secondary spread (confirmed): Facebook groups (Apple Almond applealmond, a.pice.of.cake), IG Reels, YouTube Shorts (the developer's own @SuilaApp tutorial channel plus user-made tutorials), Skool communities; phone reseller Jiesheng Telecom published a long review 2026-07-21 (used to drive traffic and sell phones); the MIT product directory mit-products.cc also lists it.
- Store search / chart climbing (inferred): after reaching #1 on the overall chart, chart exposure would keep driving downloads, but there's no data. No ad campaigns were found, and the author writes "solo development, run low-key".
- X: x-radar found 0 results for "Suila" in the past 120 days; only 1 reposts from a sock puppet account (@emma0319). Almost nobody on X knows about it.
Why it took off
- Timing: 2025-06 CapCut / Jianying changed its terms of service to allow unlimited use of the material you upload (INSIDE report); Taiwan's army using CapCut for editing raised security questions (Economic Daily News). Taiwanese users already had built-in wariness of Chinese editing apps and only lacked a convenient local alternative. Almost all of Suila's posts talk about "not wanting to use Jianying".
- Easy to pass along: "Built by one person after work", "for my girlfriend's security", "Made in Taiwan", "completely free, works in airplane mode". Each point is shareable on Threads, and the Taiwanese-accented name "水啦" (Suila) is memorable and feels local.
- The product is good enough and updates fast: curve speed changes, local auto-subtitles (bilingual, SRT), automatic face blurring, custom font import, Reels/TikTok safe zones, which cover the high-frequency needs of short-video creators. The author responded to requests at nearly daily cadence (from 1.0 to 1.15.0 took only 4 months), with a rating of 4.9.
- The author is credible: a senior iOS engineer and designer, and netizens dug up his background on their own to vouch for him. The privacy promise holds up because the author is believable.
- Zero-cost acquisition: no ads and no subscriptions, so there's no revenue to recoup; word of mouth can run entirely on "free and good-hearted".
Differentiation, and was it the reason it worked?
The differentiation isn't in editing features. CapCut and Edits have more features and are also free. What's really different is trust, in three layers: no login, no uploads, no data collection (the privacy policy says it "collects nothing"); made by a local Taiwanese; made by one person with no commercial motive. This trust gap is why it broke out, and it only holds in a market as sensitive to Chinese apps as Taiwan. The feature highlights (curve speed, face blurring, traditional Chinese fonts) are reasons to stay, not reasons to come.
How many people have seen it
Word has spread in small circles: it broke out of its niche in Taiwan's Threads and FB communities (posts at the 40k-view level, reaching #1 on the overall chart), with one reseller advertorial; no mainstream press interviews, 0 discussion on X, and revenue entirely unpublished (tips only, anyway). Outside Taiwan, almost nobody knows about it.
Copycats
No direct copycat products found. 2026-09-25, the official Threads account warned of "suspected piracy" and told people not to download from unknown sources, suggesting someone has already piggybacked on the name or released a knockoff installer (exactly which, unverified).
What to borrow
- In markets wary of an app from a particular country, "made locally + no uploads + free" works as a complete positioning. It could be copied to regions that are privacy-sensitive and lack quality local-language tools, such as Cantonese subtitles in Hong Kong; this is pure speculation.
- A solo developer telling a "why I built this" story, paired with a partner or users posting updates on Threads consistently, works better than paid ads.
- Turn the hard gate of a new Play developer account, "12 testers for 14 days," into a community event, and build hype for the launch at the same time.
- On-device AI (on-device speech recognition, face detection) makes "completely free" affordable: no server costs.
Unknowns
- No independent data on the exact dates or how long it stayed on the August overall chart at #1 (the database only starts on 10-28).
- iOS actual downloads: 309 ratings in Taiwan; by common ratios that suggests tens of thousands of downloads, but that's only an estimate.
- How much sponsorship income it gets is unknown; the author says the money goes to paying the developer annual fee.
- What "suspected piracy" specifically refers to hasn't been verified.
- Whether the Android version keeps users: there are no ratings or review counts on Play, and the author admits testing was on a single Pixel only, with compatibility still being fixed.
Sources
- Website and FAQ: suila.app/; privacy policy suila.app/privacy
- App Store: apps.apple.com/tw/app/id6781609534 (iTunes lookup: 2026-11-06:309 ratings, 4.90 stars, v1.15.0)
- Play: play.google.com/store/apps/details?id=co.hanpo.suila; googleplay database app_day / chart_rank / app_day_ext (2026-10-29 to 11-06)
- appstore database, app_profile / app_day (2026-10-28 to 11-06)
- Threads recommendation post: www.threads.com/@blog.mixflavor/post/DaCuOiFE1Lo/ (2026-06-2.64M views)
- Official Threads: www.threads.com/@suila.app (09-15 recruiting testers, 10-21 Android launch, 09-25 piracy warning)
- Girlfriend's account post: www.threads.com/@beouter/post/Da9DkuyEz4d/
- @akartworks post series: www.threads.com/@akartworks/post/DaFo5fxj1sy/
- @chipher:www.threads.com/@chipher/post/DaEZ0XYkgM5/
- JYES Telecom review (2026-07-21): www.jyes.com.tw/news.php?act=view&id=15181
- FB groups: www.facebook.com/groups/applealmond/posts/3563563437142353/; www.facebook.com/groups/a.pice.of.cake/posts/353229209361588…
- CapCut terms controversy: www.inside.com.tw/article/38876; army using CapCut: money.udn.com/money/story/7307/9297279
- Concat:www.kocpc.com.tw/archives/672353
- x-radar search for "Suila" over the last 120 days: 0 posts