# Sleep Tracker, AutoSleep vs Battery Materials Toolkit

Sleep Tracker, AutoSleep and Battery Materials Toolkit are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Sleep Tracker, AutoSleep | Battery Materials Toolkit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 4 MB | 28 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [yajing pang](https://appshunter.io/developer/1745831534) | [碧珍 刘](https://appshunter.io/developer/372781020) |

## What reviewers say

### Sleep Tracker, AutoSleep

[App page](https://appshunter.io/ios/app/sleep-tracker-autosleep/id6745084582)

**Features:** macOS Compatibility

**In-app purchases:** none


### Battery Materials Toolkit

[App page](https://appshunter.io/ios/app/battery-materials-toolkit/id6776542889)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sleep Tracker, AutoSleep free?

Sleep Tracker, AutoSleep is free to download, with no in-app purchases.

### Is Battery Materials Toolkit free?

Battery Materials Toolkit is free to download, with no in-app purchases.

### Do Sleep Tracker, AutoSleep or Battery Materials Toolkit have ads?

Neither Sleep Tracker, AutoSleep nor Battery Materials Toolkit shows ads.

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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.*