# ぐらぐら島 vs Flick Letters Brain Training

The clearest difference is update cadence: Flick Letters Brain Training at every 3 days against ぐらぐら島's every 4 months. ぐらぐら島's advantage is iOS requirement (11.0 vs 14.0). On price, ads, in-app purchases and device support there is nothing between them.

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

ぐらぐら島 ships an update every 4 months, Flick Letters Brain Training every 3 days. The most recent releases landed on October 25, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | ぐらぐら島 | Flick Letters Brain Training |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Every 3 days** |
| Size | 194 MB | 117 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ZERONE](https://appshunter.io/developer/1708775781) | [TSUBASA MIZUNO](https://appshunter.io/developer/888522562) |

## What reviewers say

### ぐらぐら島

[App page](https://appshunter.io/ios/app/id1521230535)

**Features:** macOS Compatibility

**In-app purchases:** none


### Flick Letters Brain Training

[App page](https://appshunter.io/ios/app/flick-letters-brain-training/id6757726732)

**In-app purchases:** none


## Frequently asked questions

### Is ぐらぐら島 free?

ぐらぐら島 is free to download, with no in-app purchases.

### Is Flick Letters Brain Training free?

Flick Letters Brain Training is free to download, with no in-app purchases.

### Do ぐらぐら島 or Flick Letters Brain Training have ads?

Both ぐらぐら島 and Flick Letters Brain Training show ads.

### Which is updated more often, ぐらぐら島 or Flick Letters Brain Training?

ぐらぐら島 ships an update every 4 months, and Flick Letters Brain Training every 3 days. Most recently, ぐらぐら島 was updated on October 25, 2026 and Flick Letters Brain Training on October 13, 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.*