Meds.
A medication tracker that keeps everything on the phone: no account, no server, no tracking.
Product direction
A list and a checkbox
I wanted a simple way to remember whether I'd taken my meds today. That shouldn't need an account or a server, so Meds. is a list and a checkbox. It was also my experiment in shipping an app end to end, from React Native to App Store Connect.
Trust and safety
Nothing leaves the phone
Medication data is sensitive, and I wrote much of the app with an AI assistant, so I didn't want a server anywhere near it. Everything lives in a database on the phone: no account, no network calls, no analytics. Deleting a medication deletes every record of it, and tests check that it does.
Design and engineering
Small, and tested where it matters
Built with Expo, in English and Traditional Chinese. The data logic sits apart from the screens, so the tests run against a database in memory, including the privacy ones. I explained the whole design in plain words in How Meds. Protects Your Privacy.
Outcome
Still found, almost a year later
Meds. launched in December 2025 and has had no marketing. In the 90 days from August 14 to November 11, 2026, 19 people downloaded it, up 73% from the 90 days before, and most found it by searching the App Store. Since launch it has reached people in the US, Taiwan, Germany, New Zealand and Russia. The experiment did its job: I've shipped an app on my own, from the first commit to the store.