Privacy Policy

Last updated: 22 July 2026 · Applies to the Taller Ninja mobile and web app and taller.ninja

The short version: Taller Ninja is built privacy-first. By default, everything you enter stays on your own device. We show no ads, we use no tracking, and we never sell data. Creating an account is optional and only exists so you can back up and restore your own progress.

Who we are

Taller Ninja ("we") is published by TrackPixel. Contact: hello@taller.ninja.

What data the app handles

Profile answers — age, height, parents' heights, the growth-formula answer (optional), sleep and sport habits. Used only to calculate your height estimate and personalise your plan.
Height log — the measurements you enter yourself.
Progress data — XP, streaks, belts, badges, completed exercises, reminder preferences.

By default all of this is stored only on your device. It is not sent to us or to anyone else.

Optional account (backup & sync)

If you choose to create an account — with your email address or by signing in with Google or Apple — your profile and progress data are additionally stored in our database (hosted by Supabase, in the EU) so you can restore them on a new device. We store your email address solely to operate your account. We do not use it for marketing without your explicit consent.

What we never do

No advertising and no ad networks.
No behavioural tracking or analytics profiles.
No selling or sharing of personal data with third parties.
No calorie counting or food diaries.

Children and teens

Taller Ninja is designed for teens. We deliberately collect the minimum data possible, everything is private by default, and accounts are optional. If you are under 16 (EU) or under 13 (US), ask a parent or guardian before creating an account. Parents can contact us at hello@taller.ninja to have a child's account and data deleted.

Deleting your data

On your device: Settings → "Delete all my data" removes everything instantly. Uninstalling the app does the same.
Account data: deleting your account in the app removes your data from our database. You can also email us and we will delete it within 30 days.

Notifications

Training and measurement reminders are local notifications, scheduled on your device. They involve no server and can be turned off in Settings or in your system settings.

Your rights (GDPR)

You have the right to access, correct, export and delete your personal data, and the right to complain to your data protection authority. For anything data-related, contact hello@taller.ninja.

Not medical advice

Taller Ninja offers general lifestyle tips about exercise, posture, nutrition and sleep. It is not medical advice. Growth is largely determined by genetics — healthy habits help you reach your natural potential. Talk to a doctor if you have questions about your growth.

Changes

If we change this policy, we will update this page and the "last updated" date. Meaningful changes will be announced in the app.