# 脳トレ21 vs Arrow Tap Flow

The clearest difference is iOS requirement: 脳トレ21 at 11.0 against Arrow Tap Flow's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on November 11, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | 脳トレ21 | Arrow Tap Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (119 ratings)](https://appshunter.io/ios/app/arrow-tap-flow/id6767092037/reviews)** |
| Number of ratings | — | **119** |
| Positive reviews | — | 55.6% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | — | Ad-supported |
| Size | 107 MB | 253 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ZERONE](https://appshunter.io/developer/1708775781) | [文浩 杨](https://appshunter.io/developer/1888801676) |

## What reviewers say

### 脳トレ21

[App page](https://appshunter.io/ios/app/21/id1471846944)

**Features:** macOS Compatibility

**In-app purchases:** none


### Arrow Tap Flow

[App page](https://appshunter.io/ios/app/arrow-tap-flow/id6767092037)

Test your timing and coordination in this rhythm-based game. Tap directional arrows in sync with on-screen patterns to clear levels and achieve high scores. Enjoy offline play with progressive difficulty and responsive feedback.

**Highlights:** Rhythm-based gameplay, Progressive difficulty levels, Local score tracking, Optional vibration/sound feedback, Offline play, Touch-optimized interface

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

**In-app purchases:** none


## Frequently asked questions

### Is 脳トレ21 free?

脳トレ21 is free to download, with no in-app purchases.

### Is Arrow Tap Flow free?

Arrow Tap Flow is free to download, with no in-app purchases.

### Do 脳トレ21 or Arrow Tap Flow have ads?

Both 脳トレ21 and Arrow Tap Flow show ads.

### Which is updated more often, 脳トレ21 or Arrow Tap Flow?

脳トレ21 ships an update every 3 months, and Arrow Tap Flow every 3 months. Most recently, 脳トレ21 was updated on November 11, 2026 and Arrow Tap Flow on November 9, 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.*