Zenko: Offline Puzzle Games

Zenko is a small collection of offline puzzle games: several logic games in one app, with more being added over time. It is made for people who like to think at their own pace – there are no time limits outside the campaign, no account and no sign-in.

What you can play:
- Sudoku – five difficulty levels, and every board is guaranteed to have exactly one solution. Difficulty is rated by the solving techniques a board really needs, and the hint explains the next step instead of just writing a digit for you.
- Block Puzzle – a classic 9x9 grid. Shapes never rotate, so every move is pure planning.
- Hexa Sort – sort stacks of colourful discs. The discs carry no numbers: you read how many there are from the edges of the stack.
- 2048 – slide and merge tiles, thinking a few moves ahead.
- Pipes – connect the pipes into one working line.

The campaign boards ship inside the app and are identical for every player. You clear them in order, and their difficulty is measured by a solving bot rather than simply declared.

Offline first: these offline puzzle games work without wifi and without mobile data – on a plane, on the subway, anywhere. There is no account, no login, and the app never asks you to invite friends. An internet connection is used only to show ads.

Coins are earned by playing and cannot be bought. Spend them on board skins and helpers in the shop, with separate styles for light mode and dark mode.

Zenko also cares about comfort: light and dark theme, every colour palette is automatically checked for contrast, and a symbol mode for players who cannot tell colours apart can be switched on in the settings. The app is available in 30 languages.

And to be upfront about what Zenko is not: it is a single-player game with no online rankings, your progress stays on one device, and the app shows ads – that is what keeps it running. If you are looking for quiet, honest offline puzzle games, Zenko is for you.