This calculator is arithmetic on a table, not a live mixer. Enter quantities from your own +1 Stone Skipping session. It will not click the shop.
Upgrade payback
Wins payback
Estimate how many repeatable throws it takes for an extra Wins gain to cover a price you type in. One September 30 session needed 10 Wins for a +5 Skill card. That is an example, not the price in your server.
Payback cycles = upgrade cost ÷ extra profit per cycle, rounded up.
Type the Wins price shown on the stone or egg you are considering. Then throw with and without that upgrade, using the same pets and boost chips, and type the extra Wins you actually gained. The minutes field only turns that throw count into a time estimate. Defaults are form examples, not prices from the game. A 2x Win chip, a different zone, or one lucky throw makes the result useless. This form cannot see your account.
