Privacy Policy

Covers Math Games: Numinja on iOS and Android, version 0.6.6. 22 September 2026.

The short version

Numinja has no sign-up, no account and no server of its own. Your scores and settings live only on your phone. The only third party is Google AdMob, which shows ads between runs and may collect device data to do so. We run no analytics and no crash reporting.

What stays on your phone

The game writes one settings file in its own storage: your best score for each difficulty, your recent results, your difficulty and language, whether sound and vibration are on, the blade trail you chose, how many runs you have played, and the counters that decide when an ad may appear. Deleting the app deletes that file. On iOS it rides your iCloud or device backup, and on Android it is included in Auto Backup; that copy goes to your own Apple or Google account and we cannot read it.

What we do not collect

No name, email address, phone number or contacts. No location. No photos, camera or microphone. No analytics and no crash reporting of our own. Numinja has no server, so there is nothing of yours we could store.

Ads

Ads come from Google AdMob: an interstitial between finished runs, and a rewarded video you can choose to watch to revive a run once. To deliver ads and bill for them, Google's SDK may collect device identifiers, whether an ad was shown or tapped, your IP address (which gives an approximate location) and diagnostic data about itself. Google uses these to deliver ads, cap how often you see the same one, and detect fraud. Ad content is capped at a general-audience rating in our AdMob settings.

If you are in the European Economic Area, the United Kingdom or Switzerland, the game shows Google's consent form the first time it starts, and a Privacy options row in Settings reopens it whenever you want to change or withdraw your answer. The game is exactly the same either way. On iOS the game shows no App Tracking Transparency prompt, because it does not track you across other apps or websites. Google explains its own handling in the Google Privacy & Terms.

Children

Numinja is a general-audience arithmetic game. It is not directed at children under 13 and does not knowingly collect personal data from anyone.

Changes and contact

When this policy changes, the date above changes with it and the new text ships with the next update. Questions go to info@eren.sh.