# Gacha Calc vs くじ電卓

The clearest difference is in-app purchases: Gacha Calc at none against くじ電卓's 1. Gacha Calc also leads on update cadence (daily vs every 3 weeks) and iOS requirement (14.0.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. くじ電卓 sells 1 one-off in-app purchase. Gacha Calc asks for nothing beyond the download.

Gacha Calc ships an update daily, くじ電卓 every 3 weeks. The most recent releases landed on September 19, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Gacha Calc | くじ電卓 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Daily** | Every 3 weeks |
| Size | 36 MB | 8 MB |
| Requires iOS | **14.0.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [hyeokjin cho](https://appshunter.io/developer/1859562663) | [JIAPENG Zhao](https://appshunter.io/developer/1877119025) |

## What reviewers say

### Gacha Calc

[App page](https://appshunter.io/ios/app/gacha-calc-probability-sim/id6756255892)

**Features:** macOS Compatibility

**In-app purchases:** none


### くじ電卓

[App page](https://appshunter.io/ios/app/and/id6762051496)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $1.99 | one-time |


## Frequently asked questions

### Is Gacha Calc free?

Gacha Calc is free to download, with no in-app purchases.

### Is くじ電卓 free?

くじ電卓 is free to download, with in-app purchases available.

### Do Gacha Calc or くじ電卓 have ads?

Both Gacha Calc and くじ電卓 show ads.

### Which is updated more often, Gacha Calc or くじ電卓?

Gacha Calc ships an update daily, and くじ電卓 every 3 weeks. Most recently, Gacha Calc was updated on September 19, 2026 and くじ電卓 on September 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*