# Back Ext. Counter! vs 猫背改善アプリ 背筋がシュッとニャン太くん

The clearest difference is in-app purchases: Back Ext. Counter! at none against 猫背改善アプリ 背筋がシュッとニャン太くん's 3. 猫背改善アプリ 背筋がシュッとニャン太くん's advantage is ads (none vs shown) and update cadence (every 2 days vs every 4 months). On price and device support there is nothing between them.

Both are free to download. 猫背改善アプリ 背筋がシュッとニャン太くん sells 3 one-off in-app purchases. Back Ext. Counter! asks for nothing beyond the download.

Back Ext. Counter! ships an update every 4 months, 猫背改善アプリ 背筋がシュッとニャン太くん every 2 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Back Ext. Counter! | 猫背改善アプリ 背筋がシュッとニャン太くん |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 31 MB | 21 MB |
| Requires iOS | 16.6 | **11.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Intersect](https://appshunter.io/developer/641416964) | [TSUKUTTEMITA, K.K.](https://appshunter.io/developer/876337293) |

## What reviewers say

### Back Ext. Counter!

[App page](https://appshunter.io/ios/app/back-ext-counter/id1365383530)

**In-app purchases:** none


### 猫背改善アプリ 背筋がシュッとニャン太くん

[App page](https://appshunter.io/ios/app/id1441878897)

This app helps improve posture by alerting you with a cat's meow or vibration when you slouch. It tracks your posture and provides a score to encourage daily improvement. Requires a shirt with a chest pocket or a way to secure the phone near your chest.

**Highlights:** Posture detection with sound alerts, Vibration feedback for slouching, Posture tracking and scoring, Adjustable detection sensitivity, Daily progress monitoring

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告の削除 | $1.99 | one-time |
| バイブ機能の追加 | $1.99 | one-time |
| 全ての機能の制限を解除 | $2.99 | one-time |


## Frequently asked questions

### Is Back Ext. Counter! free?

Back Ext. Counter! is free to download, with no in-app purchases.

### Is 猫背改善アプリ 背筋がシュッとニャン太くん free?

猫背改善アプリ 背筋がシュッとニャン太くん is free to download, with in-app purchases available.

### Do Back Ext. Counter! or 猫背改善アプリ 背筋がシュッとニャン太くん have ads?

Back Ext. Counter! shows ads; 猫背改善アプリ 背筋がシュッとニャン太くん does not.

### Which is updated more often, Back Ext. Counter! or 猫背改善アプリ 背筋がシュッとニャン太くん?

Back Ext. Counter! ships an update every 4 months, and 猫背改善アプリ 背筋がシュッとニャン太くん every 2 days. Most recently, Back Ext. Counter! was updated on October 25, 2026 and 猫背改善アプリ 背筋がシュッとニャン太くん on October 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.*