How do their growth rates compare?

gengo.app has a month-over-month growth rate of -69.6%; Readable has -0.1%.

How does pricing compare?

gengo.app: Free. Completely free to use. The project accepts donations through Patreon to support development and maintenance, but there is no paid tier. Readable: Free Trial, Paid, Contact for Pricing. Pro Standard is 800 yen per month (English-to-Japanese, up to 100 pages/50 MB per file) and Pro Premium is 4,000 yen per month (200+ languages, up to 1,000 pages/200 MB), both unlimited in translation count. A Business/Kakenhi plan is quoted on request for teams and invoicing needs, and there is a 7-day free trial limited to one use per person or company.

What are alternatives to gengo.app and Readable?

Other tools in related categories include Image to Text, BelinDoc, O.Translator, DocTranslator, Image Translate AI.

gengo.app vs Readable — Traffic (430 vs 67.61K), Pricing & Verdict

Open AI Tools

gengo.app vs Readable — Traffic (430 vs 67.61K), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	gengo.app	Readable
Official Domain	gengo.app	readable.jp
Pricing Model	Free	Free Trial, Paid, Contact for Pricing
Monthly Visits	430 (430)	67.61K (67,606)
MoM Traffic Delta	-985 (-69.6%)	-55 (-0.1%)
Primary Market & Share	🇿🇦 South Africa (70.6%)	🇯🇵 Japan (97.9%)
Direct Visits / mo	151	32.64K
User Rating	4.3	4.3
Supported Platforms	Website	Website

gengo.app

Read native Japanese manga and light novels with a dictionary built into the page

Built-in OCR dictionary

Select text directly in manga and light novel pages and get immediate dictionary lookups without leaving the reader.

Your own library, your own files

Import individual images, an entire folder or a ZIP archive, so the app works with material you already own.

Immersive-learning design

The workflow follows AJATT and similar immersion methods: read native content in volume and pick up vocabulary from context.

Cross-platform by intent

It was created as a solid cross-platform alternative to the Android-only Kaku app, so readers are not locked to one device type.

Strengths & Pros

+OCR dictionary lookups happen inside the reader, which keeps reading flow intact
+Free with no paid tier, unusual for an OCR reading tool
+Deliberately cross-platform, addressing the gap left by Android-only alternatives
+Works with the material you already own rather than a subscription library