You want a thinking game that will never ask for your card. 123doku has no in-app purchases: nothing to buy, no grid behind a paywall, no subscription. It may be the best way to put your head to work without spending a cent. This page says what that means once you are playing, and what the ads change, because there are ads.
On the Google Play listing, under the install button, 123doku carries no «In-app purchases» label. That is not our promise: it is a label Google applies itself, based on what the app ships. And there is nothing to pay because, strictly, there is nothing that could take payment: the Android billing library is not in the package. No screen can ask you for money, not even by mistake.
There is a currency in the game. It only buys hints, and it only comes from playing: a solved grid pays, the daily grid pays, and the daily leagues hand out coins by ranking. Four kinds of help exist, and that is all coins buy:
You are never stuck for lack of coins. When you run out, a hint is offered to you after a few minutes of play.
An honest page says so before you find out. 123doku shows an ad between two grids, not after every grid. And it offers an optional video to double a reward, never to unlock anything: turning it down closes no door, slows no progress and locks no grid. That is what pays for the game instead of your card.
No account, no email address, no social login. You install and you play. The game offers you a recovery code to write down: that is what gives your progress back if you change phone, and it stands in for the sign-up you never had to do.
| What you want | What it costs | How you get it |
|---|---|---|
| Playing, and moving through the ladder | nothing | a solved grid opens the next |
| The daily grid, every day | nothing | it is there at launch |
| All six themes | nothing | available from day one |
| A hint | coins | earned by solving grids |
| Doubling a reward | a video, if you want | optional, never forced |