# 数学トレーニング vs Focus & Fish

The clearest difference is update cadence: Focus & Fish at every 5 days against 数学トレーニング's every 4 months. Focus & Fish also leads on rating (5.0 vs 4.8). 数学トレーニング's advantage is review sentiment (76% vs 62%) and ratings volume (52 vs 10). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 数学トレーニング sells 1 in-app purchase, starting at $1.99 per month and Focus & Fish sells 7 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Focus & Fish holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: 数学トレーニング has 52 ratings behind it against 10, so its average is the more settled of the two. Written reviews complicate that: 76% of 数学トレーニング's written reviews are positive against 62% of Focus & Fish's, so the app with the better star average is not the one people write more warmly about.

数学トレーニング ships an update every 4 months, Focus & Fish every 5 days. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | 数学トレーニング | Focus & Fish |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (52 ratings)](https://appshunter.io/ios/app/id1070817345/reviews) | **[5.0 (10 ratings)](https://appshunter.io/ios/app/focus-and-fish-study-timer-app/id1669133971/reviews)** |
| Number of ratings | **52** | 10 |
| Positive reviews | **76.2% of reviews** | 61.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 64 MB | 274 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [StudySwitch, Inc.](https://appshunter.io/developer/1368900403) | [Takeshi Segawa](https://appshunter.io/developer/541433653) |

## What reviewers say

### 数学トレーニング

[App page](https://appshunter.io/ios/app/id1070817345)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 本気で勉強プラン | $1.99 | per month |


### Focus & Fish

[App page](https://appshunter.io/ios/app/focus-and-fish-study-timer-app/id1669133971)

This app helps you reclaim your time by blocking distracting social media apps. As you focus, you'll grow a virtual fish in a digital aquarium, encouraging a healthier digital life.

**Highlights:** Block distracting social apps, Set custom focus timers, Grow virtual fish in an aquarium, Regain control of your time, Promotes healthier digital habits

**Features:** Family Sharing, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads (Monthly) | $0.99 | per month |
| 3 Days Ad-Free：No Subscription | $0.29 | one-time |
| 1000G | $2.99 | one-time |
| 3000G | $5.99 | one-time |
| 10000G | $11.99 | one-time |
| 300,000G | $29.99 | one-time |
| 1,000,000G | $69.99 | one-time |


## Frequently asked questions

### Is 数学トレーニング free?

数学トレーニング is free to download, with in-app purchases available.

### Is Focus & Fish free?

Focus & Fish is free to download, with in-app purchases available.

### Which has better reviews, 数学トレーニング or Focus & Fish?

Focus & Fish is rated higher. 数学トレーニング averages 4.8 out of 5 from 52 ratings, while Focus & Fish averages 5.0 from 10 ratings.

### Do 数学トレーニング or Focus & Fish have ads?

Both 数学トレーニング and Focus & Fish show ads.

### Which is updated more often, 数学トレーニング or Focus & Fish?

数学トレーニング ships an update every 4 months, and Focus & Fish every 5 days. Most recently, 数学トレーニング was updated on September 23, 2026 and Focus & Fish on September 24, 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.*