# Sleep vs StackMapFitness

The clearest difference is in-app purchases: StackMapFitness at none against Sleep's 2. StackMapFitness also leads on ads (none vs shown). Sleep's advantage is iOS requirement (14.0 vs 16.4). On price, update cadence and device support there is nothing between them.

Both are free to download. Sleep sells 2 in-app purchases, starting at $7.99 per 7 days. StackMapFitness asks for nothing beyond the download.

Sleep ships an update monthly, StackMapFitness every 3 weeks. The most recent releases landed on October 1, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Sleep | StackMapFitness |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (5 ratings)](https://appshunter.io/ios/app/sleep-tracker-relax-sounds/id1619773534/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 303 MB | 43 MB |
| Requires iOS | **14.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [DPM APPS LP](https://appshunter.io/developer/1596368239) | [StackMap Systems Limited](https://appshunter.io/developer/6773102576) |

## What reviewers say

### Sleep

[App page](https://appshunter.io/ios/app/sleep-tracker-relax-sounds/id1619773534)

This app offers a smart alarm clock designed to wake you during light sleep phases, with various alarm types including math problems. It also provides a library of relaxing sounds and music to help you unwind.

**Highlights:** Smart alarm for light sleep phases, Customizable standard alarms, Variety of relaxation sounds, Relaxation music genres, HealthKit integration for step tracking advice, Math equation or text-based wake-up challenges

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $7.99 | per 7 days |
| Yearly Subscription | $39.99 | per year |


### StackMapFitness

[App page](https://appshunter.io/ios/app/stackmapfitness/id6773304835)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sleep free?

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

### Is StackMapFitness free?

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

### Do Sleep or StackMapFitness have ads?

Sleep shows ads; StackMapFitness does not.

### Which is updated more often, Sleep or StackMapFitness?

Sleep ships an update monthly, and StackMapFitness every 3 weeks. Most recently, Sleep was updated on October 1, 2026 and StackMapFitness on September 18, 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.*