Gacha Chest
for Game Designers
Model pull rates, pity systems, and player luck variance with Monte Carlo precision. See the player experience before you tune a single drop rate.

Setup your gacha in five steps
Define items
Set up multi-rarity item pools with individual drop rates for commons, rares, and chase items.
Configure rolls
Define single pulls, 10-pull discounts, and how many rolls players make per session.
Set guaranteed items
Add hard pity, soft pity, or guaranteed high-rarity drops to protect unlucky players.
Add currencies
Add guaranteed currencies to your chests.
Track your system
Link currencies to track your system in Architect mode.
Analyze pull distributions
Analyze the results of opening 1000's of chests.
Ship gacha systems that feel fair
Configure your gacha chest in minutes and analyze what happens when opening 1000's of chests.
Start simulating for free






















