# 確率計算ツール vs くじ電卓

The clearest difference is update cadence: 確率計算ツール at monthly against くじ電卓's every 2 months. 確率計算ツール also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 確率計算ツール sells 1 in-app purchase, starting at $0.99 per month and くじ電卓 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

確率計算ツール ships an update monthly, くじ電卓 every 2 months. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 確率計算ツール | くじ電卓 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Monthly** | Every 2 months |
| Size | 7 MB | 8 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Seiya Matsui](https://appshunter.io/developer/1561221635) | [JIAPENG Zhao](https://appshunter.io/developer/1877119025) |

## What reviewers say

### 確率計算ツール

[App page](https://appshunter.io/ios/app/id1659266582)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告なしプラン | $0.99 | per month |


### 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 確率計算ツール free?

確率計算ツール is free to download, with in-app purchases available.

### Is くじ電卓 free?

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

### Do 確率計算ツール or くじ電卓 have ads?

Both 確率計算ツール and くじ電卓 show ads.

### Which is updated more often, 確率計算ツール or くじ電卓?

確率計算ツール ships an update monthly, and くじ電卓 every 2 months. Most recently, 確率計算ツール was updated on October 27, 2026 and くじ電卓 on October 28, 2026.

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