# Yappy! vs GRIMOVE｜スマホをロックして集中

The clearest difference is in-app purchases: Yappy! at none against GRIMOVE｜スマホをロックして集中's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. GRIMOVE｜スマホをロックして集中 sells 4 in-app purchases, starting at $1.99 per month. Yappy! asks for nothing beyond the download.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 9, 2026 and August 17, 2026 respectively.

## The numbers

| Metric | Yappy! | GRIMOVE｜スマホをロックして集中 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Size | 17 MB | 7 MB |
| Requires iOS | 17.5 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [TOSHIHIKO MORI](https://appshunter.io/developer/1735176809) | [HIKARU KAWASAKI](https://appshunter.io/developer/1891992854) |

## What reviewers say

### Yappy!

[App page](https://appshunter.io/ios/app/yappy/id6738614954)

**Features:** macOS Compatibility

**In-app purchases:** none


### GRIMOVE｜スマホをロックして集中

[App page](https://appshunter.io/ios/app/grimove/id6761903440)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GRIMOVE 月額 | $1.99 | per month |
| GRIMOVE 年額 | $19.99 | per year |
| コーヒー | $0.99 | one-time |
| プロテイン | $29.99 | one-time |


## Frequently asked questions

### Is Yappy! free?

Yappy! is free to download, with no in-app purchases.

### Is GRIMOVE｜スマホをロックして集中 free?

GRIMOVE｜スマホをロックして集中 is free to download, with in-app purchases available.

### Do Yappy! or GRIMOVE｜スマホをロックして集中 have ads?

Neither Yappy! nor GRIMOVE｜スマホをロックして集中 shows ads.

### Which is updated more often, Yappy! or GRIMOVE｜スマホをロックして集中?

Yappy! ships an update monthly, and GRIMOVE｜スマホをロックして集中 monthly. Most recently, Yappy! was updated on September 9, 2026 and GRIMOVE｜スマホをロックして集中 on August 17, 2026.

---

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