Music, messages, calendar, the routes you walked: an honest record of your life already exists, scattered across apps that never speak to each other. UnderstandUrself brings it together into one private timeline you can walk back into, and keeps it where only you can read it.
Why we are building this
Understanding yourself is not a memory problem. It is a record problem.
Every tool that promises self-knowledge asks you to start from a blank page and keep it up every day. Almost nobody can. Meanwhile the record is already there. You just have no way to read it, and the companies that could connect it make their money by watching you.
What it does
Each one exists somewhere in the market already. Nobody has put them in the same app, and nobody has done it without reading your life on their own servers.
01 / timeline
Not a statistic about last spring. Last spring itself: the photos, the messages, the appointments, the music, the route you took, woven into one day you can move through again. A correlation tells you something happened. Walking back in lets you feel what it was like.
02 / sources
The recording already happened, so the app works backwards through whatever history you bring it: messages, calendar, Spotify, a one-tap daily mood. You get something worth reading before you have logged a single thing yourself.
03 / relevance
The useful question is not which past day most resembles today, but which one is most useful for today. If today feels heavy, it finds a stretch when a similar mood lifted, and shows you what surrounded the change. Your own history, described. Never a prediction.
04 / reflection
Look-backs, trackers you define yourself, and an assistant that helps you make sense of what you are seeing, grounded in your real history rather than generic advice. It is always clearly software, and it says so.
A look-back, roughly
You do not get a score. You get a day back, with enough around it that you can recognise it, and decide for yourself what it meant.
We do not chase streaks. Every few days is completely fine. To understand yourself you need to spend time with yourself, not with an app.
a day like today
14 march
Four months ago you had a week that felt like this one. It lifted. Here is what was around it.
Illustrative example. Everything shown here would come from your own device, and stays there.
How it works
One at a time, and never silently. In Europe you have a free legal right to a copy of your own data, so you can sign once instead of knocking on ten doors. Any source can be revoked again.
Your device encrypts everything under a key only you hold. When heavier processing is needed, it happens inside an attested secure enclave: briefly, in memory, never written down, and not readable by us.
A timeline you can walk into, look-backs when they are useful, and the stretches of your past that are worth seeing again. On your terms, at your cadence.
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 client-side encrypted. The key is derived 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.
Nothing is sold, nothing is used for advertising, and nothing trains a model unless you actively donate it.
THIS IS THE ARCHITECTURE WE ARE BUILDING. PARTS OF IT ARE STILL IN DEVELOPMENT, AND WE SAY WHICH ONES.
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.