Your music, your messages, your calendar, the routes you walked. An honest trace of your life already exists. It just isn't yours to read. We bring it onto one private timeline, on your device, under a key only you hold.
How it works
01
WhatsApp, Spotify, your calendar. Your data is already in there. Some connect with a single tap. The rest don't offer that, so you ask them for a copy of your own data — in Europe that is your right — and add the file yourself, once. Disconnect anything whenever you like: what it brought goes with it.
94%
of people who start a mood tracker are gone within a month. Manual logging fails on exactly the days it matters. UnderstandUrself starts full instead.
02
The trace is already there, so UnderstandUrself reads backwards through it. Months or years of your history on day one, not a blank page asking for discipline.
About mood tracking as it exists today, not about us.
Whenever I had a bad experience, I didn't want to put it in the app. […] I just wanted to lay there and cry.
03
Tap a day and it opens: the photos, the messages, the music, the route. Enough around it that you recognise it and decide for yourself what it meant.
About mood tracking as it exists today, not about us.
It works well for me because my memory is crap, and I would have no clue what happened when if I didn't write it down.
From a blog on years of tracking by hand, mentalhealthathome.org
04
Rate a look-back, answer a short check-in, or give a forgotten week its mood afterwards. You can log backwards, because you can step back in. Never a prediction, only a description.
2 to 4x
more variation sits inside one person over time than between different people. No average of other people can label your day, which is why the labels in this step are yours.
05
Ask in plain words. The answer is built only from your own record and names the days it came from. The heavier thinking runs in a sealed enclave that we cannot read into.
About mood tracking as it exists today, not about us.
I have confirmation that I am feeling shitty. But it doesn't really help you do anything about it.
Only your device and an attested enclave ever see your data in the clear. The full architecture is on the privacy page.
Quotes and figures are from published research and public reviews about mood tracking in general. Nobody has used UnderstandUrself yet; that is what the waitlist is for.
Why we are building this
Understanding yourself starts with the trace you already left.
Every tool that promises self-knowledge asks you to start from a blank page and keep it up every day. Almost nobody can, and the ones people do keep up mostly confirm that they feel bad without showing them what was around it. Meanwhile the trace already exists. It sits with companies that make their money watching you. Read by them. Never by you. UnderstandUrself hands it back.
The promise
Only your device and an attested enclave ever see your data in the clear. We cannot read it, keep it, or hand it over.
Storage is local, and encrypted on your device before anything else happens. The key is made on your device and never sent to us.
Backups are end-to-end encrypted in your own iCloud or Google Drive. We hold no key to them.
We are paid by the people who use the app, never by advertisers. Nothing about you is sold, nothing feeds advertising, and nothing trains a model unless you choose to donate it.
THIS IS THE ARCHITECTURE WE ARE BUILDING. PARTS OF IT ARE STILL IN DEVELOPMENT, AND WE WILL NOT CLAIM ONE IS FINISHED BEFORE IT IS.
Where we are
We are a small team in Berlin and Darmstadt building the on-device architecture first, because it is the part everything else depends on. Private alpha in 2027, German-speaking launch after that.
UnderstandUrself is a well-being and self-reflection tool. It is not a medical device and does not diagnose, treat, predict or provide early warning of any condition. If you are struggling, please speak to a qualified professional.
