Ryota Labs — independent app studio, Japan
I design, build, and maintain focused iOS apps on my own: study tools, personal record-keeping, and utilities for people who use AI every day. Every app below is live on the App Store.
A simple log for aesthetic-clinic treatments: what was done, when, and what comes next.
Flashcards scheduled with FSRS spaced repetition. Works fully offline, syncs across devices with an account, and imports decks from CSV. Free with an optional subscription.
Turns AI chat transcripts and Markdown snippets into clean images you can post on social media or send to your team.
Keeps up with trending AI projects on GitHub.
Saves and organizes the QR codes you need to show again.
Real-time bus arrivals, delay-adjusted arrival times, and custom routes for students commuting to a university campus in Shiga, on iOS and Android. Rated 4.5 from 151 ratings and still in use today.
Founded and led as a four-person student project, recognized with a university scholarship, and transferred to a new maintainer in 2023.
In development: AnkiAI Capture. Photograph a textbook page, upload a lecture PDF, or paste meeting notes, and Claude turns it into a ready-to-study deck. Each card links back to the exact line it came from, so learners can check it before it enters their FSRS review schedule.
Claude handles reading the source (including handwriting and diagrams), choosing what is worth memorizing, and writing clear question-and-answer pairs. Users review and edit every card before saving it. Card generation is part of the premium plan.
Why Claude: Capture reads PDFs natively (text and page images), grounds every card with the Citations API so its source link comes from the API rather than model-written text, and emits cards through structured outputs. Prompt caching and the Batches API keep a full textbook deck inside the subscription's margin. Read the technical design.
Next: a weekly digest in GitAITrend that uses Claude to explain what each trending AI repository does and who it is for, in plain Japanese and English.