# Light Sleep vs Motor Function

The clearest difference is in-app purchases: Motor Function at none against Light Sleep's 1. Motor Function also leads on ads (none vs shown) and review sentiment (100% vs 83%). Light Sleep's advantage is ratings volume (44 vs 1). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Light Sleep sells 1 one-off in-app purchase. Motor Function asks for nothing beyond the download.

Motor Function holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Light Sleep has 44 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 83% of Light Sleep's written reviews are positive against 100% of Motor Function's.

Light Sleep ships an update every 3 days, Motor Function weekly. The most recent releases landed on October 14, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Light Sleep | Motor Function |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (44 ratings)](https://appshunter.io/ios/app/light-sleep-white-noise/id6449638248/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/motor-function/id6763461844/reviews)** |
| Number of ratings | **44** | 1 |
| Positive reviews | 82.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Weekly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 93 MB | 5 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [亚杰 刘](https://appshunter.io/developer/1651547334) | [WeMake, Corp.](https://appshunter.io/developer/1518362354) |

## What reviewers say

### Light Sleep

[App page](https://appshunter.io/ios/app/light-sleep-white-noise/id6449638248)

This app offers a library of professionally recorded white noise sounds designed to improve sleep, reduce stress, and enhance concentration. It features nature sounds, ambient noises, and calming music to create a tranquil environment for relaxation and focus.

**Highlights:** White noise library, Nature sounds, Relaxation music, Sleep improvement, Stress reduction, Concentration aid

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all sounds | Free | one-time |


### Motor Function

[App page](https://appshunter.io/ios/app/motor-function/id6763461844)

This rehabilitation companion helps MCI patients and seniors track their 12-week recovery journey. It intelligently manages aerobic, strength, balance, and cognitive training with adaptive safety features tailored to individual medical profiles.

**Highlights:** 12-week recovery tracking, Aerobic, strength, balance, cognition training, Intelligent safety features, Smart heart rate zones, Flexible course pausing, Transparent reports, MoCA follow-up tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is Light Sleep free?

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

### Is Motor Function free?

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

### Which has better reviews, Light Sleep or Motor Function?

Motor Function is rated higher. Light Sleep averages 4.8 out of 5 from 44 ratings, while Motor Function averages 5.0 from 1 ratings.

### Do Light Sleep or Motor Function have ads?

Light Sleep shows ads; Motor Function does not.

### Which is updated more often, Light Sleep or Motor Function?

Light Sleep ships an update every 3 days, and Motor Function weekly. Most recently, Light Sleep was updated on October 14, 2026 and Motor Function on October 10, 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.*