# Auto Sleep Detector & Tracker vs FastOnce

The clearest difference is update cadence: FastOnce at every 6 days against Auto Sleep Detector & Tracker's monthly. Auto Sleep Detector & Tracker's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, ads and in-app purchases there is nothing between them.

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

Auto Sleep Detector & Tracker ships an update monthly, FastOnce every 6 days. Both last shipped on September 9, 2026.

## The numbers

| Metric | Auto Sleep Detector & Tracker | FastOnce |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/auto-sleep-detector-and-tracker/id6743064638/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 6 days** |
| Monetization | Paid | — |
| Size | 40 MB | 6 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SimpliXio Pte. Ltd.](https://appshunter.io/developer/1735257600) | [Andrii Zakharov](https://appshunter.io/developer/6779217338) |

## What reviewers say

### Auto Sleep Detector & Tracker

[App page](https://appshunter.io/ios/app/auto-sleep-detector-and-tracker/id6743064638)

Automatically track sleep duration and patterns using your phone's sensors. Get personalized insights and recommendations to improve your rest without wearables or subscriptions. All your data stays securely on your device.

**Highlights:** AI-powered sleep tracking, No wearables required, Privacy-first design, Detailed sleep analytics, Apple Health integration, Personalized sleep insights

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### FastOnce

[App page](https://appshunter.io/ios/app/fastonce-fasting-timer/id6780015850)

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

**In-app purchases:** none


## Frequently asked questions

### Is Auto Sleep Detector & Tracker free?

Auto Sleep Detector & Tracker is free to download, with no in-app purchases.

### Is FastOnce free?

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

### Do Auto Sleep Detector & Tracker or FastOnce have ads?

Neither Auto Sleep Detector & Tracker nor FastOnce shows ads.

### Which is updated more often, Auto Sleep Detector & Tracker or FastOnce?

Auto Sleep Detector & Tracker ships an update monthly, and FastOnce every 6 days. Most recently, Auto Sleep Detector & Tracker was updated on September 9, 2026 and FastOnce on September 9, 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.*