# とけいのべんきょう vs さんすう水族館

The clearest difference is in-app purchases: とけいのべんきょう at none against さんすう水族館's 6. とけいのべんきょう also leads on iOS requirement (13.0 vs 17.0). さんすう水族館's advantage is ads (none vs shown) and update cadence (weekly vs monthly). On price and device support there is nothing between them.

Both are free to download. さんすう水族館 sells 6 one-off in-app purchases. とけいのべんきょう asks for nothing beyond the download.

とけいのべんきょう ships an update monthly, さんすう水族館 weekly. The most recent releases landed on August 21, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | とけいのべんきょう | さんすう水族館 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/id6444246329/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Weekly** |
| Size | 155 MB | 22 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ohmori Takeru](https://appshunter.io/developer/969791681) | [Kosuke Mawatari](https://appshunter.io/developer/1489564137) |

## What reviewers say

### とけいのべんきょう

[App page](https://appshunter.io/ios/app/id6444246329)

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

**In-app purchases:** none


### さんすう水族館

[App page](https://appshunter.io/ios/app/id6796571918)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3けたのかず ぜんぶあそぶ | $0.99 | one-time |
| かずをかぞえる1〜10まで ぜんぶあそぶ | $0.99 | one-time |
| かずをかぞえる10〜20まで ぜんぶあそぶ | $0.99 | one-time |
| 1けたのけいさん ぜんぶあそぶ | $0.99 | one-time |
| とけい・じこくとじかん ぜんぶあそぶ | $0.99 | one-time |
| おかいもの・おつり100円と200円 ぜんぶあそぶ | $0.99 | one-time |


## Frequently asked questions

### Is とけいのべんきょう free?

とけいのべんきょう is free to download, with no in-app purchases.

### Is さんすう水族館 free?

さんすう水族館 is free to download, with in-app purchases available.

### Do とけいのべんきょう or さんすう水族館 have ads?

とけいのべんきょう shows ads; さんすう水族館 does not.

### Which is updated more often, とけいのべんきょう or さんすう水族館?

とけいのべんきょう ships an update monthly, and さんすう水族館 weekly. Most recently, とけいのべんきょう was updated on August 21, 2026 and さんすう水族館 on September 21, 2026.

---

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