# Sleep Timer vs Challenges Aid

The clearest difference is review sentiment: Sleep Timer at 100% against Challenges Aid's 30%. Sleep Timer also leads on rating (4.7 vs 4.1) and in-app purchases (none vs 3). Challenges Aid's advantage is price (Free vs $1.99). On ratings volume, ads and device support there is nothing between them.

Challenges Aid is free to download; Sleep Timer costs $1.99 up front. Challenges Aid sells 3 in-app purchases, starting at $0.99 per month. Sleep Timer asks for nothing beyond the download.

Sleep Timer holds the better App Store score, 4.7 against 4.1. Both are backed by a comparable volume of ratings — 17 and 7 respectively. Written reviews point the same way: 100% of Sleep Timer's written reviews are positive against 30% of Challenges Aid's.

Sleep Timer ships an update weekly, Challenges Aid fortnightly. The most recent releases landed on September 14, 2026 and July 9, 2026 respectively.

## The numbers

| Metric | Sleep Timer | Challenges Aid |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.7 (17 ratings)](https://appshunter.io/ios/app/sleep-timer-relaxing-sounds/id1490846678/reviews)** | [4.1 (7 ratings)](https://appshunter.io/ios/app/challenges-aid/id6443764002/reviews) |
| Number of ratings | **17** | 7 |
| Positive reviews | **100.0% of reviews** | 30.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Paid | **Freemium** |
| Size | 198 MB | 8 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Irina Tiukalova](https://appshunter.io/developer/1450613737) | [Tim Hilker](https://appshunter.io/developer/1473865123) |

## What reviewers say

### Sleep Timer

[App page](https://appshunter.io/ios/app/sleep-timer-relaxing-sounds/id1490846678)

Drift off to sleep or find focus with a variety of calming soundscapes. This app allows you to create custom mixes and enjoy them even when your device is locked or the app is running in the background. Improve your sleep, reduce stress, and enhance meditation sessions.

**Highlights:** Custom sound mixes, Background playback, Offline playback (device locked), Variety of sound themes, Stress and anxiety reduction

**Features:** macOS Compatibility

**In-app purchases:** none


### Challenges Aid

[App page](https://appshunter.io/ios/app/challenges-aid/id6443764002)

This app helps you track and achieve your monthly Apple Watch fitness challenges. It provides insights into your progress, offers reminders, and displays your achievements through a history tab and customizable widgets.

**Highlights:** Monthly challenge progress tracking, Historical achievement overview, Motivational messages, Home and Lock Screen widgets, Limited Edition Challenge tracking, Customizable reminders

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly | $0.99 | per month |
| Plus Yearly | $9.99 | per year |
| Plus Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is Sleep Timer free?

Sleep Timer costs $1.99, with no in-app purchases.

### Is Challenges Aid free?

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

### Which has better reviews, Sleep Timer or Challenges Aid?

Sleep Timer is rated higher. Sleep Timer averages 4.7 out of 5 from 17 ratings, while Challenges Aid averages 4.1 from 7 ratings.

### Do Sleep Timer or Challenges Aid have ads?

Neither Sleep Timer nor Challenges Aid shows ads.

### Which is updated more often, Sleep Timer or Challenges Aid?

Sleep Timer ships an update weekly, and Challenges Aid fortnightly. Most recently, Sleep Timer was updated on September 14, 2026 and Challenges Aid on July 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.*