Years turns the quiet signals your Apple Watch already hears into your biological age — then shows you the face time meant for you. One honest glance a day, for years — that's the whole practice.
Your body keeps its own calendar. Years reads it from your watch, every day.
Nearly all of it optional — even the face. No streaks, no plans, no supplements. Bring your patience.
Two things, each only when the feature runs. The selfie you choose for your render — together with your calendar age and biological age, the two numbers the render needs. And a short daily summary of derived health metrics (biological age, heart-rate variability, resting heart rate, sleep, steps) that writes your daily message — plus the "about you" note, if you chose to write one. Raw Apple Health data is never sent anywhere.
Your selfie goes to Google's Gemini image model — that's what draws the you whose biological age matches your calendar age. Your health summary goes to Anthropic's Claude — that's what writes your daily message. Both requests travel encrypted via OpenRouter, the API service Years uses to reach those models; if OpenRouter is unavailable, the render goes to Google directly.
Years runs no servers, so we keep nothing. OpenRouter doesn't store the content of requests — only billing metadata like token counts. Google retains abuse-monitoring logs for up to 55 days, then deletes them. Anthropic deletes inputs and outputs within 30 days. None of them use your data to train models.
Your Apple Health data — it's read on your iPhone, and your biological age is computed right there. Your photos and renders, stored only inside the app on your device. Your history. There is no account, no analytics, no trackers, and no third-party SDK in the app at all.
Static files and nothing else — no cookies, no analytics, no forms. It keeps no data at all.
Straight from the code and the providers' current terms — last reviewed July 2026.
Come back soon
