# Smart Brush Timer vs Fatigue & Rest Tracker

The clearest difference is in-app purchases: Smart Brush Timer at none against Fatigue & Rest Tracker's 2. Smart Brush Timer also leads on update cadence (every 2 months vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Fatigue & Rest Tracker sells 2 in-app purchases, starting at $0.99 per month. Smart Brush Timer asks for nothing beyond the download.

Smart Brush Timer ships an update every 2 months, Fatigue & Rest Tracker every 5 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | Smart Brush Timer | Fatigue & Rest Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Size | 32 MB | 69 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shintae Park](https://appshunter.io/developer/1829258738) | [Ryota Sasazawa](https://appshunter.io/developer/1823371625) |

## What reviewers say

### Smart Brush Timer

[App page](https://appshunter.io/ios/app/smart-brush-timer/id6752644788)

**Features:** macOS Compatibility

**In-app purchases:** none


### Fatigue & Rest Tracker

[App page](https://appshunter.io/ios/app/fatigue-and-rest-tracker-calmo/id6753157576)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (1Month) | $0.99 | per month |
| Premium (1Year) | $3.99 | per year |


## Frequently asked questions

### Is Smart Brush Timer free?

Smart Brush Timer is free to download, with no in-app purchases.

### Is Fatigue & Rest Tracker free?

Fatigue & Rest Tracker is free to download, with in-app purchases available.

### Do Smart Brush Timer or Fatigue & Rest Tracker have ads?

Neither Smart Brush Timer nor Fatigue & Rest Tracker shows ads.

### Which is updated more often, Smart Brush Timer or Fatigue & Rest Tracker?

Smart Brush Timer ships an update every 2 months, and Fatigue & Rest Tracker every 5 months. Most recently, Smart Brush Timer was updated on October 25, 2026 and Fatigue & Rest Tracker on October 25, 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.*