# 確率ジェネ — ガチャ・くじの当選確率を瞬時に計算

> ガチャ・くじの当選確率を瞬時に計算 (iPhone/iPad app by ryuichi hayashida.)

- Source: https://appshunter.io/ios/app/id6746195144 (this page in markdown: same URL + `.md`)
- Developer: [ryuichi hayashida](https://appshunter.io/developer/1808362152)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 37 MB
- Languages: American English, German (Germany), Italian, Japanese, Korean, European Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2025-12-08
- Data updated: 2026-06-01
- User reviews in markdown: https://appshunter.io/ios/app/id6746195144/reviews.md

## What is 確率ジェネ?

"Probability Calc" is a tool that calculates chances in lotteries, gacha pulls, and draws using statistical models.
Main features
• Hypergeometric distribution: chance of drawing hits
• Cumulative binomial distribution: chance of k hits in n trials
• Simple input with instant results
Recommended uses
• Estimate gacha pulls needed
• Pack-opening hit simulation
• Campaign win-rate check
• Game design and learning
Privacy
No login needed. All data stays on your device. Ads are minimal.


## Version history (last 3 releases)

### 1.2 — 2025-12-09

Added multi-language support.

### 1.0.1 — 2025-06-04

・軽微なバグの修正

### 1.0 — 2025-05-31

No release notes.

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## More apps by ryuichi hayashida

- [gridshotcamera](https://appshunter.io/ios/app/gridshotcamera/id6752639707)
- [Brain Training Dojo](https://appshunter.io/ios/app/brain-training-dojo/id6754189429)
- [脳トレブロックパズル道場](https://appshunter.io/ios/app/id6756634814)

All apps by ryuichi hayashida: https://appshunter.io/developer/1808362152

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*