# Idle vs atrophy

The clearest difference is in-app purchases: Idle at none against atrophy's 2. atrophy's advantage is iOS requirement (17.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. atrophy sells 2 in-app purchases, starting at $4.99 per month. Idle asks for nothing beyond the download.

Idle ships an update every 6 days, atrophy every 5 days. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Idle | atrophy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/atrophy/id6765778979/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 5 days** |
| Monetization | — | Freemium |
| Size | 112 MB | 11 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Synthetic Solutions, Inc.](https://appshunter.io/developer/1802253311) | [Graham Annett](https://appshunter.io/developer/1896070977) |

## What reviewers say

### Idle

[App page](https://appshunter.io/ios/app/idle-chat-and-widgets/id6743326518)

**Features:** iMessage stickers, Vision Pro support

**In-app purchases:** none


### atrophy

[App page](https://appshunter.io/ios/app/atrophy/id6765778979)

This app helps you assess how much you rely on AI for judgment. It offers offline diagnostic quizzes to identify AI-generated content, verify claims, and gauge your confidence. Results are presented as a calibration score and a shareable card.

**Highlights:** Offline diagnostic quizzes, AI content identification, Claim verification, Confidence gauging, Calibration score, Shareable result card

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Atrophy Monthly | $4.99 | per month |
| Atrophy Yearly | $49.99 | per year |


## Frequently asked questions

### Is Idle free?

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

### Is atrophy free?

atrophy is free to download, with in-app purchases available.

### Do Idle or atrophy have ads?

Neither Idle nor atrophy shows ads.

### Which is updated more often, Idle or atrophy?

Idle ships an update every 6 days, and atrophy every 5 days. Most recently, Idle was updated on October 13, 2026 and atrophy on October 7, 2026.

---

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