# Gacha Calc: Probability Sim

> Calculate Gacha Odds & Costs

Canonical page: [https://chrome-stats.com/d/id6756255892](https://chrome-stats.com/d/id6756255892)

## Overview

- **ID:** `id6756255892`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** hyeokjin cho
- **Category:** Utilities
- **Version:** 1.1.7
- **Last updated:** 2026-03-17
- **First published:** 2025-12-08
- **Size:** 36 MB
- **Data as of:** 2026-09-26
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/gacha-calc-probability-sim/id6756255892)
- **Website:** [https://www.simplewoody.com/](https://www.simplewoody.com/)
- **Privacy policy:** [https://www.simplewoody.com/simplew/app\_privacy\_policy/privacy\_policy\_simplewoody\_eng.html](https://www.simplewoody.com/simplew/app_privacy_policy/privacy_policy_simplewoody_eng.html)

## Description

Are you a fan of in-game gacha draws, opening your wallet based solely on the hope of "This time, it has to drop"?
The [Gacha Calc: Probability Sim] is your essential tool, helping you predict spending and make smarter drawing plans based on mathematical probability, not just intuition.
Key Features
 - Accurate Probability Calculation (Independent Trials): Simply enter the item's drop rate (%) and your desired number of attempts. The app instantly calculates the "Probability of acquiring at least one item."
 - Predictive Table: We provide an easy-to-read table showing the minimum number of attempts and the estimated cost required to reach your target probability milestones (e.g., 50%, 90% success rate).
 - History Tracking: Conveniently save your calculation results and check your simulation data anytime in the history log, allowing you to track your past strategies.
 - Clean UI/UX: The app offers a simple, intuitive design that anyone can use—no complex formulas, just instant input and immediate results.
Stop Overspending Now!
Instead of relying on vague expectations, use the [Gacha Calc: Probability Sim] to predict your goal achievement rate and optimize your spending.

## Rankings

- #1,315,498 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6756255892)