# RestBest vs ShiftSleep

The clearest difference is in-app purchases: RestBest at none against ShiftSleep's 3. ShiftSleep's advantage is update cadence (monthly vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ShiftSleep sells 3 in-app purchases, starting at $4.99 per month. RestBest asks for nothing beyond the download.

RestBest ships an update every 4 months, ShiftSleep monthly. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | RestBest | ShiftSleep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Size | 25 MB | 48 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [The Medical University of South Carolina](https://appshunter.io/developer/1503987548) | [Rodney Hughey](https://appshunter.io/developer/1874804018) |

## What reviewers say

### RestBest

[App page](https://appshunter.io/ios/app/restbest/id6474356461)

**Features:** macOS Compatibility

**In-app purchases:** none


### ShiftSleep

[App page](https://appshunter.io/ios/app/shiftsleep/id6759355366)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ShiftSleep Pro Monthly | $4.99 | per month |
| ShiftSleep Pro Yearly | $39.99 | per year |
| ShiftSleep Pro Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is RestBest free?

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

### Is ShiftSleep free?

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

### Do RestBest or ShiftSleep have ads?

Neither RestBest nor ShiftSleep shows ads.

### Which is updated more often, RestBest or ShiftSleep?

RestBest ships an update every 4 months, and ShiftSleep monthly. Most recently, RestBest was updated on October 12, 2026 and ShiftSleep 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.*