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Progress tracking
Log your height as you go and watch the curve — and watch your prediction sharpen as the data accumulates.
Measurements, not vibes
Enter heights in feet and inches or centimetres. The chart shows what you've logged, and the app works out your real growth velocity from it using a least-squares fit once there's enough history.
It feeds back into your prediction
Your measured growth rate replaces the app's estimate once it has enough data — so tracking isn't a separate hobby from predicting, it's what makes the prediction better.
Achievements for what you actually did
Unlocks are tied to logged data — nights slept, sessions completed, heights recorded — not to opening the app.