LeWell
A health app that teaches you one small habit a day.
Personal product · 2026
A health app for iPhone and Android that teaches one small, evidence-based habit at a time — sleep, food, movement — in lessons short enough to finish while the kettle boils. It is live in both app stores.
Try it
Interactive demoHealth advice is everywhere and almost nobody acts on it. The problem was never information, it was follow-through. The app had to make a daily two-minute habit feel worth returning to, prove the person was making progress, and do it without nagging.
A daily feed of short lessons, each ending in a question that checks the idea actually landed. Getting it right moves you forward and keeps a streak alive. People come back for the streak long enough for the habits to stick.
Shipping it meant everything around the product too: subscriptions, app store review for both Apple and Google, and a testing round with real users before launch.
Under the hoodFor the technical reader
React and TypeScript, packaged for iPhone and Android with Capacitor so one codebase ships to both stores and the web. Express and Postgres behind it, with Prisma migrations, running as a single Render service. Exercise feedback is generated by a self-hosted inference server I run and maintain myself — systemd, nginx, its own deploy script and an eval suite — rather than a paid API, which keeps the per-user cost at zero. Releases go out through an automated version and build pipeline across both stores, and the whole thing is typechecked and tested in CI.