Puzzles for five minutes.
That turn into an hour.

Open it and play. No sign-up, no subscription, no ads in the middle of a round.

Sudoku Lab icon

Sudoku Lab

Elegant sudoku, straight to the point.

  • Four levels, from easy to expert
  • Daily Challenge, Zen mode and Hardcore
  • Works without internet
  • Free, no account and no subscription
Download on the App Store Get it on Google Play See the Sudoku Lab screens
Sudoku Lab win screen, with stars and a new record
Block Lab icon

Block Lab

Drop blocks. Clear lines. Repeat.

  • 9×9 grid, three pieces at a time
  • No timer, at your own pace
  • Works without internet
  • Free, no account and no subscription
Download on the App Store Get it on Google Play See the Block Lab screens
Block Lab home screen, with high score and a new game button
Ícone do Decifra

Decifra

Build the word. Watch out for the intruders.

  • 1,000 everyday words
  • No timer, at your own pace
  • Intruder letters and a word of the day
  • Free, no account and no subscription
Coming soon to the App Store Coming soon to Google Play See the Decifra screens
Decifra home screen, with the word of the day and the level map
About NIOL Lab

Three games, one standard.

NIOL Lab is an independent studio making puzzle games for phones. There are three so far: Sudoku Lab, a sudoku with four difficulties, a daily challenge and a hardcore mode that forgives no mistake; Block Lab, a block-fitting puzzle on a 9×9 grid, with no clock; and Decifra, a word game where some letters are intruders, with a word of the day and a daily chest.

All three follow the same house rules: they are free, they work without internet, they ask for no account and they never show an ad in the middle of a round. Your progress is saved on your device, not on our servers — we collect no personal data to let you play.

Sudoku Lab and Block Lab are on the App Store and on Google Play, for iPhone, iPad and Android; Decifra is coming soon to both stores. Question, bug or suggestion: the support page has the way in.