The Langdogu app
The learning app that pairs with Lingua Layer. Lingua Layer handles the moment you meet a word on the web; the app keeps the record and the review, and opens it to the assistants and servers you choose.
No release dates. Nothing is on sale.
From reading to review and back
Meet it
Read a Japanese or Chinese page with Lingua Layer, which is live today.
LiveSave it
Save an expression together with the sentence where you met it.
In developmentUnderstand it
See its meaning, its structure and examples.
In developmentReview it
Spaced repetition (FSRS) brings it back just before you would forget it.
In developmentRead again
The next time you read, the expressions you know are told apart.
Planned
The link between Lingua Layer and the app, the learning loop, is planned. Lingua Layer 0.2.1 does not save words.
Your record, open
The app keeps one record of what you know. These are the ways it opens up.
AI connections
In developmentLet Claude or ChatGPT open your vocabulary over MCP and talk with you about what you learned today. Reading and writing are granted separately, and you can disconnect at any time in the app.
How AI connections workYour own server
In developmentRun Langdogu on your own PC, NAS or server, with the same features, API and MCP server. Free forever; bring your own AI key.
About self-hostingExport
PlannedA full JSON backup that keeps everything, and Anki files with your expressions and their sentences.
Export and your dataPlanned pricing
PlannedLocal and self-hosted use free forever, Cloud Free, Plus at $8 a month, and managed AI at the provider’s cost × 1.3 with a default cap of $3 a month. Nothing is on sale.
See planned pricing
A companion, not a streak
In developmentMotivation comes from a companion you befriend in the app. It grows because you learned, not because you were afraid to miss a day.
- Its bond never goes down
- It grows mainly from real learning
- It remembers your milestones
- Accessories are earned by learning, never bought
- No streak counter, no guilt
Where it will run
- iOSIn development
- AndroidIn development
- WindowsIn development
- WebIn development
All four are in development. A local mode without an account is planned.
Who it is for first
Korean speakers reading Japanese on the web. Simplified Chinese and English are also in scope.
Tell me when it’s ready
There is no waitlist form while storage and privacy are being decided. Write to [email protected] instead.
Tell me when it’s ready