On vs Yomibuddy
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
On
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- Generate subtitle from sound of the videos with targeted language. - Translate into your desired language in Real-time.
Yomibuddy
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Yomibuddy turns any printed page in front of you into a tappable, translatable, AI-assisted reading experience. Photograph a page from a book, a comic, a magazine, or a sign. Yomibuddy uses Google Cloud Vision to detect every sentence on the page โ including vertical Japanese (tategaki), handwritten fonts, and dense textbook layouts with furigana. Each sentence becomes a tappable region on the photo. Tap a sentence to instantly see its translation in your target language. Need more help? Open a chat thread tied to that exact sentence and ask anything โ grammar breakdowns, alternate translations, cultural context, vocabulary, kanji readings. Each sentence keeps its own chat history. Highlights: โข On-photo translation overlay โ tap any sentence on the original page. โข Powered by Google Cloud Vision OCR + your choice of frontier LLM (Gemini, Claude, or GPT) for translation and chat. โข Built-in trial keys so you can start immediately, no setup required. โข 20-page rolling library โ captured pages and chat threads persist locally on your device. โข Vertical Japanese, handwritten typography, picture books, and densely typeset textbook pages all work. โข Pre-translates the whole page on capture so tapping a sentence is instant. Designed for language learners reading native-language content who want help without losing the joy of reading the original.
Screenshots
Verdict
The clearest difference is update cadence: Yomibuddy at every 3 days against On's every 2 months. On's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On ships an update every 2 months, Yomibuddy every 3 days. The most recent releases landed on September 30, 2026 and October 11, 2026 respectively.
| Parameter | On | Yomibuddy |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 3 days โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 โ better | 17.0 |
| Further details โ not scored | ||
| Size | 68 MB | 84 MB |
| Age rating | 4+ | 4+ |
| Developer | Ratthamontree Burimas | ENSHIN K.K. |
In-app purchases
On
No in-app purchases
Yomibuddy
No in-app purchases









