Kludoku is free, and it stays free. Nothing on this page unlocks anything. No feature, no case, no hint, no rank, no removed advertising — there is no version of the game you get by paying and no version you lose by not. If you would rather give nothing, that is a completely normal way to play this game and always will be.
The game runs on two machines in Singapore and the bandwidth to reach them. A new player downloads about 7 MB the first time they open a case — mostly the artwork — and a thousand new players in a day is a real line on a real bill. That bill is paid by one person, out of pocket, and it has always been.
The figure below is a share of a month's hosting, not the whole of it and not a threshold. Nothing switches off if it is not met. It is there because a number you can check is more honest than a sentence asking you to imagine one.
Payments are handled by Stripe. This site never sees a card number, and the wallets (Alipay, WeChat Pay) are handled by Stripe too. The figure at the bottom of this page is what has come in during the current calendar month, counted in UTC, and it changes when a payment settles rather than when it is started.
Servers and bandwidth. Not salary, not marketing, not a studio. If that ever changes this page changes with it.
Two things, and this is not a polite formality — both are worth more to the game than a contribution:
¥0.00 / ¥700.00