# Calculus Gacha！ vs ベクトル

The clearest difference is price: Calculus Gacha！ at Free against ベクトル's $2.99. Calculus Gacha！ also leads on update cadence (every 3 days vs weekly) and iOS requirement (15.0 vs 18.0). ベクトル's advantage is in-app purchases (none vs 4). On ads and device support there is nothing between them.

Calculus Gacha！ is free to download; ベクトル costs $2.99 up front. Calculus Gacha！ sells 4 one-off in-app purchases. ベクトル asks for nothing beyond the download.

Calculus Gacha！ ships an update every 3 days, ベクトル weekly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Calculus Gacha！ | ベクトル |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Weekly |
| Size | 83 MB | 36 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shunsuke Nakamura](https://appshunter.io/developer/1828229182) | [Akira Hiraoka](https://appshunter.io/developer/1668714727) |

## What reviewers say

### Calculus Gacha！

[App page](https://appshunter.io/ios/app/calculus-gacha/id6753078774)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 不定方程式ガチャ利用オプション | $0.99 | one-time |
| AI Tutor Pass | $2.99 | one-time |
| AI Tutor Plus(500) | $2.99 | one-time |
| 履歴管理機能オプション | $2.99 | one-time |


### ベクトル

[App page](https://appshunter.io/ios/app/id6797364257)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculus Gacha！ free?

Calculus Gacha！ is free to download, with in-app purchases available.

### Is ベクトル free?

ベクトル costs $2.99, with no in-app purchases.

### Do Calculus Gacha！ or ベクトル have ads?

Neither Calculus Gacha！ nor ベクトル shows ads.

### Which is updated more often, Calculus Gacha！ or ベクトル?

Calculus Gacha！ ships an update every 3 days, and ベクトル weekly. Most recently, Calculus Gacha！ was updated on October 30, 2026 and ベクトル on October 31, 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.*