Gacha Simulator

Features

A gacha simulator lets you test the luck system of a gacha game without spending a single pull. Set your own SSR base rate, hard pity, soft pity and rate-up guarantee, run thousands of simulated pulls, and see realistic outcomes, exact probability tables and expected cost. Everything is computed locally in your browser and nothing is uploaded.

A gacha simulator is a free probability tool that simulates game pulls using your own SSR rate, pity and guarantee settings, so you can see realistic results and expected cost before spending real money.

When You Need This

Common pain points this tool solves

1. You want to know how many pulls a target character realistically takes before you spend.
2. You want to compare two banners: a 0.6% SSR rate with 90-pull hard pity versus a 2% rate with no guarantee.
3. You want to see what a soft pity window really changes in your odds.
4. You are setting a budget and want an expected-cost range instead of one lucky or unlucky result.

How to Use

Step-by-step instructions

1. Open the Banner settings card and enter the SSR base rate, hard pity, soft pity start and rate-up share of the game you want to test.
2. Turn on the guarantee option if the game makes the next SSR the rate-up item after you miss it once.
3. Pick a preset or keep your custom values, then switch to the Simulate tab.
4. Set the pulls per session and the number of sessions, optionally add a cost per pull, then press Run simulation.
5. Read the averages, distribution and cost summary, then open the Probability tab for the exact odds before you decide.

How it works

Step-by-step instructions

1. Configure the banner. Enter the SSR base rate, hard pity, soft pity start and rate-up share, or pick a preset that matches the game you want to test.
2. Run the simulations. Set the pulls per session and the session count, add an optional cost per pull, and press Run simulation.
3. Read the statistics. Compare the average pulls per SSR, rate-up counts, pity hits and the session distribution with the expected values.
4. Check the exact probabilities. Open the Probability tab to see the chance of at least one SSR or rate-up within any pull count and the pulls needed for 50%, 90% and 99% confidence.

Why Choose Korelyy

What makes us better

1. Fully customizable: SSR rate, hard pity, soft pity and rate-up guarantee
2. Exact probability math in addition to random simulation
3. No signup and no upload — everything runs in your browser
4. Optional cost per pull turns odds into a spending budget
5. Works in six languages on mobile, tablet and desktop

Monetize With This Tool

Turn this tool into a side income stream

1. Use this tool to speed up your freelance work and take on more paying clients
2. Create polished content faster for your blog, YouTube channel, or social media and grow your audience
3. Offer this tool's capabilities as a service on Fiverr, Upwork, or to your local business clients

Frequently Asked Questions

1. What is a gacha simulator?

   A gacha simulator is a free tool that recreates the random draw system of gacha games, with SSR rate, pity and guarantee rules, so you can simulate thousands of pulls and see realistic results and expected cost without spending money.

2. What does pity mean in gacha?

   Pity is a counter that guarantees an SSR after a set number of pulls without one. With a 90-pull hard pity, the 90th pull is guaranteed to be an SSR when the previous 89 pulls had none.

3. What is the difference between soft pity and hard pity?

   Hard pity is the guaranteed pull count. Soft pity is the point where the SSR chance starts to rise before hard pity, for example from pull 75 onward, so most players receive an SSR around pulls 76 to 82 instead of at the very end.

4. How accurate is the simulation?

   With enough sessions the simulated averages converge to the true probabilities computed from your settings. Single short runs still vary a lot, which is why the tool also shows the exact mathematical probability.

5. Does this tool cost money or encourage spending?

   No. The tool is free, runs locally and is meant for planning and understanding odds. It does not sell currency, connect to any game, or encourage real spending.