Your music, your messages, your calendar, the routes you walked. An honest record of your life already exists. It just isn't yours to read. UnderstandUrself brings it onto one private timeline, on your device, under a key only you hold.
Why we are building this
Understanding yourself starts with a record you already have.
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 already exists. It sits with companies that make their money watching you. Read by them. Never by you. UnderstandUrself hands it back.
What it does
Each one works on history you already have. Together they turn a pile of separate accounts into one place you can move through, and none of it leaves your device to make that happen.
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, and a one-tap daily mood if you want one. The first thing you read is already about you.
03 / relevance
Similar is easy. Useful is the point. 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.
What a look-back looks like
You get a day back, with enough around it that you can recognise it, and decide for yourself what it meant. No score, no verdict.
Every few days is completely fine, and there is nothing to break if you skip a week. 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. In the real thing, everything here comes 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: protected hardware where your data lives for seconds, in memory, never written down, and where we cannot read it.
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 own pace.
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.
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 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.