NIOL Lab — Sudoku Lab, Block Lab and Decifra

Privacy Policy

Last updated — October 12, 2026

NIOL Lab is an independent casual game studio. This policy covers the three apps we maintain — Sudoku Lab, Block Lab and Decifra — and explains, with no runaround, what happens to your data.

What we do NOT ask for

There is no sign-up, no login, no email and no name needed to play. You open the app and you play. We do not sell data to anyone, because we hold no personal data of yours to sell.

What gets saved, and where

Progress, records, achievements, coins, day streaks, settings and theme preferences are saved locally on your device. None of it ever leaves your device through us. Uninstall the app and that data goes with it.

Third-party services we use

Google AdMob — serves the optional ads that keep the apps free. AdMob may use your device advertising identifiers, subject to your system permissions (App Tracking Transparency on iOS, ad settings on Android). In the European Economic Area and the United Kingdom, we first show Google's consent form so you can choose whether to accept personalized ads. Google policy: policies.google.com/privacy

Google Firebase Analytics — measures, in aggregate, how the games are used (for example, which levels are completed, how many attempts they take and which helps are used), so we can improve the game. It may use device identifiers, such as the app installation identifier and, when you allow it, the advertising identifier. We do not receive your name, your email or your exact location. Google policy: policies.google.com/privacy

Sentry — records technical errors (device model, system version, stack trace) when the app crashes, purely so we can fix bugs faster. We cannot identify who you are from that data.

Notifications

Decifra can show reminders (for the word of the day and your day streak). They are created on the device itself, with no server of ours, and only appear if you allow them. You can turn them off at any time in the app or system settings.

Children

The apps are rated for everyone (4+), but they are not built specifically for children. If a minor uses the app under your supervision, be aware that it shows third-party ads through AdMob.

Your rights

Since we keep no personal data on any server of ours, there is no "account" to delete. To erase everything, just uninstall the app. If you have any question about this, write to us.

Changes to this policy

We may update this text as the apps evolve. The date at the top of the page always shows the most recent version.

Privacy questions