NIOL Lab — Sudoku Lab, Block Lab and Decifra

Support

Last updated — October 12, 2026

Crashed, lost a record, or just want to send a suggestion? Start with the common questions below — if that does not sort it out, just write to us.

Frequently asked questions

How do I reset my progress?
Inside the app, go to Settings → Reset progress. Uninstalling and reinstalling the app also wipes everything.

My record disappeared when I switched devices.
Progress is saved only locally on your device — there is no account or cloud sync yet. Switching phones starts from scratch.

The ads are not showing up.
Ads depend on an internet connection and on inventory being available at that moment. Sometimes there is no ad to show — that does not affect the game itself.

What are the intruder letters in Decifra?
Among the letters in the Decifra tray there are some that are not part of the word. The "Remove intruders" help clears up the tray.

I lost my coins or my day streak in Decifra.
Decifra coins, streak and progress stay only on your device. Switching phones, uninstalling the app or clearing its data starts over from scratch. The streak also goes back to zero if you skip a day of the word of the day.

What time does the word of the day change?
The word of the day is the same for everyone and changes at midnight, Brasília time.

I am not getting the Decifra reminders.
Reminders only appear if you allowed notifications. You can turn them on and off in the game pause menu or in the system settings.

I found a bug or the app crashed.
Send us an email with your device model, the system (iOS/Android) and what you were doing when it happened. It helps a lot to fix it fast.

I have a feature suggestion.
We love hearing ideas — send them over, seriously.