About Tilly

Made in Brașov, Romania · Updated 9 September 2026

Hi, I'm Adrian. I design and build Tilly myself, and I read every message sent to hello@tilly.day.

Why I built it

The weeks on a GLP-1 medication have a shape: a shot, a day or two of feeling queasy, a good stretch, and then the appetite creeping back before the next shot. I looked at the trackers out there and every one of them met that with streaks, scores and red numbers, as if a queasy Tuesday were a failure. I wanted the opposite: a journal that knows where you are in the week, says it in a plain sentence, and gives you one thing to do next. Nothing in Tilly is red. A slow week is weather, and Tilly says so.

What it knows

Tilly knows the common GLP-1 medications, their dose steps and how long each stays in the body, from their published labels. It uses that to draw the Trends curve and to notice patterns in your own journal, such as nausea landing on the same day every week. It shows its work: every number on a meal can be opened, and every answer from Tilly says where it came from. The app is in English and Romanian, and I write the words in it by hand.

What it will never do

Tilly is not medical advice and not a medical device. It never tells you what dose to take, when to take it, or whether to change anything. Those decisions belong to you and your prescriber. The doctor report exists to make that conversation easier, not to replace it.

Your data

Your journal is yours. You can export everything or delete your account from inside the app, any time, and Apple Health is read only when you switch a stream on. I don't sell data and there are no ads. The privacy page says the rest, and I wrote it to be read.

Where to find it

Tilly is on the App Store for iPhone, with Android on its way. It is free to start, and the basics stay free. I hope it makes your weeks a little calmer.