# PocoStudy vs さんすう水族館

The clearest difference is iOS requirement: PocoStudy at 15.0 against さんすう水族館's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. PocoStudy sells 1 in-app purchase, starting at $2.99 per month and さんすう水族館 sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

PocoStudy ships an update every 9 days, さんすう水族館 weekly. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | PocoStudy | さんすう水族館 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 93.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | Free | — |
| Size | 245 MB | 22 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [YURI YOSHIDA](https://appshunter.io/developer/1876828878) | [Kosuke Mawatari](https://appshunter.io/developer/1489564137) |

## What reviewers say

### PocoStudy

[App page](https://appshunter.io/ios/app/pocostudy/id6759094841)

This app offers a quiz-based learning experience for junior high school students across five core subjects. It includes detailed explanations with visuals and supports various learning levels, from foundational review to exam preparation. It also features brain-training mini-games and is accessible offline.

**Highlights:** Quiz-style learning for 5 subjects, Includes explanations, charts, and images, Suitable for all learning levels, Brain-training mini-games, Offline learning support, Over 10,000 questions

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PocoStudy プレミアム（月額） | $2.99 | per month |


### 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 PocoStudy free?

PocoStudy is free to download, with in-app purchases available.

### 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 PocoStudy or さんすう水族館 have ads?

Neither PocoStudy nor さんすう水族館 shows ads.

### Which is updated more often, PocoStudy or さんすう水族館?

PocoStudy ships an update every 9 days, and さんすう水族館 weekly. Most recently, PocoStudy was updated on October 28, 2026 and さんすう水族館 on October 25, 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.*