Author: ExpectedValue

Calculating the Number of Gacha Pulls (For Standard Gacha)

For standard gacha systems in mobile games and the like, this tool calculates the number of gacha pulls required to obtain a desired item at a given probability, along with the corresponding cost.

Calculating Probability Distributions for Gacha (For Box Gacha)

For gacha systems in mobile games and similar platforms, we calculate the probability distribution of the number of times a desired item appears after spinning the gacha a certain number of times.

Calculating Probability Distributions for Gacha (General Gacha)

For standard gacha systems in mobile games and the like, we calculate the probability distribution of the number of spins required to obtain a desired item.

Calculating Probability Distributions for Gacha (For Continuous Gacha)

For a mobile game, we will calculate the probability distribution of the number of times a desired item appears when a single consecutive gacha spin is performed.

Calculating the Expected Value of a Gacha (for Box Gachas)

For gacha systems in mobile games and the like, we calculate the expected number of spins and the expected amount spent before obtaining the desired item.

Calculating the Expected Value of a Gacha (for Rerolling)

For typical gacha systems, such as those found in mobile games, we calculate the expected number of times you’ll need to reroll before obtaining the item you want.

Calculating the Expected Value of a Gacha (For General Gachas)

For gacha systems in mobile games and the like, we calculate the expected number of spins and the expected amount spent to obtain several desired items.

Calculating the Expected Value of a Gacha (For Gachas with a Cap)

For gacha systems with a cap, such as those found in mobile games, we calculate the expected number of pulls and the expected amount spent to obtain a single desired item.

Calculating the expected value of a gacha (for collection gachas with varying drop rates)

For gacha systems in mobile games and the like, we calculate the expected number of spins and the expected amount spent to obtain several desired items, each with different drop rates.

Calculating the Expected Value of Gacha (for Consecutive Draws)

For consecutive gacha draws in mobile games and similar titles, we calculate the expected number of draws required to obtain a desired item.

Verification of Gacha Drop Rates (For General Gachas)

For gacha systems in mobile games and similar platforms, we will verify the confidence interval for an item’s drop rate based on the number of times that item appeared when the gacha was spun.

Verification of Gacha Drop Rates (for consecutive draws)

In mobile games, when a certain item appears multiple times after spinning the gacha several times in a row, we will simply verify the drop rate of that item when it is the guaranteed prize.

Calculating Stamina in the Game

In games that use stamina, such as mobile games, this calculates the number of times you can play based on your current stamina and future stamina.

Calculating the Number of Runs and Run Duration in a Game

When playing mobile games and replaying the same stage to collect in-game items, this tool calculates the number of runs required and the total time needed to obtain the desired number of drops.