News / ONI Games
Two Free Tools for Players: An Idle Game Calculator and a Pay-to-Win Test
ONI Games · Published
We built two free tools for players: a calculator that answers the big questions of any idle game, and a 12-point test that shows how pay-to-win a mobile game is before you spend money on it.
We make free games, and the same two questions keep coming up, from players and from ourselves when we play other studios' games: what should I buy next, and is this game going to make me pay? So we built two tools that answer them. They are free, need no account and run entirely in your browser.
The idle game calculator
The idle game calculator does the math every idle game hides. Type in the numbers your game shows and it tells you:
- what the next 10, 50 or 100 levels of an upgrade cost, and how many your coins can buy;
- how long until you can afford something at your current income;
- which of several upgrades pays for itself first, the best single rule for spending in any idle game;
- how much faster a prestige reset would make you, with a clear reset-now or keep-going verdict;
- what numbers like 1.5e18, 1Qi or 1ab mean.
Each calculator comes with the formula behind it and examples from our own games, so you can see why the answer is what it is. It works for most idle and incremental games, not only ours.
The pay-to-win test
The pay-to-win test is twelve yes-or-no questions about a game, from whether you can buy power to whether recent reviews complain about paywalls. Tick what is true and it scores the game from fair to pay-to-win. Every question is explained: what it means, how to check it in ten minutes and why games are designed that way.
We wrote it from the developer's side of the table. We know why energy systems, VIP levels and countdown offers exist, because studios like ours decide on them, and we would rather players knew what they look like.
Why free, and why now
Both tools are free because they are useful, and because we would rather earn players' trust than their clicks. They also arrive just after the new PEGI age ratings that started in June 2026 and rate games by how they sell for the first time: the test covers the same features PEGI now looks at, such as paid random items and limited-time offers.
We will add more calculators as we hear what players need.
