# Sleep Time+ Cycle Alarm Clock vs REM Sleep Tracker

The clearest difference is review sentiment: Sleep Time+ Cycle Alarm Clock at 69% against REM Sleep Tracker's 0%. Sleep Time+ Cycle Alarm Clock also leads on rating (4.8 vs 4.2) and ratings volume (2.5K vs 49). REM Sleep Tracker's advantage is monetization model (freemium vs subscription) and ads (none vs shown). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Sleep Time+ Cycle Alarm Clock sells 8 in-app purchases, starting at $4.99 per month and REM Sleep Tracker sells 2 in-app purchases, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.

Sleep Time+ Cycle Alarm Clock holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Sleep Time+ Cycle Alarm Clock has 2.5K ratings behind it against 49, so its average is the more settled of the two. Written reviews point the same way: 69% of Sleep Time+ Cycle Alarm Clock's written reviews are positive against 0% of REM Sleep Tracker's.

Sleep Time+ Cycle Alarm Clock ships an update monthly, REM Sleep Tracker every 2 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Sleep Time+ Cycle Alarm Clock | REM Sleep Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (2.5K ratings)](https://appshunter.io/ios/app/sleep-time-plus-cycle-alarm-clock/id498360026/reviews)** | [4.2 (49 ratings)](https://appshunter.io/ios/app/rem-sleep-tracker/id6446677275/reviews) |
| Number of ratings | **2.5K** | 49 |
| Positive reviews | **68.8% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Subscription | **Freemium** |
| Size | 185 MB | 25 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Azumio Inc.](https://appshunter.io/developer/439290207) | [Nicola Eusebi](https://appshunter.io/developer/737311863) |

## What reviewers say

### Sleep Time+ Cycle Alarm Clock

[App page](https://appshunter.io/ios/app/sleep-time-plus-cycle-alarm-clock/id498360026)

Understand your sleep patterns and wake up feeling refreshed. This app tracks sleep cycles, offers soothing soundscapes for falling asleep, and measures resting heart rate without wearables. It provides detailed analysis and customizable alarms to optimize your sleep and wake-up experience.

**Highlights:** Sleep cycle analysis, Soothing soundscapes, Resting heart rate measurement, Smart alarm clock, Detailed sleep graphs, Apple Health integration

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per month |
| Premium | $8.99 | per month |
| Premium | $9.99 | per month |
| Premium | $9.99 | per month |
| Premium | $19.99 | per 3 months |
| Premium | $29.99 | per year |
| Premium | $29.99 | per year |
| Premium | $46.99 | per year |

**What reviewers like**

- 🚀 Helps track sleep patterns
- 👍 Gentle alarm wakes you up
- 🌊 Soundscapes help fall asleep
- 💤 Provides sleep quality insights

**What reviewers complain about**

- 🐛 Alarm issues (fails to go off, resets unexpectedly)
- 🔋 Battery drain
- 💰 Paywall for core features
- 🤖 Inaccurate sleep tracking

**Reported bugs**

- Crashes on startup
- Freezing issues
- Inconsistent alarm behavior
- Lost sleep data after updates

**Requested features**

- Heart rate monitoring integration
- Sleep data export and analysis
- Apple Watch companion app
- More customization options


### REM Sleep Tracker

[App page](https://appshunter.io/ios/app/rem-sleep-tracker/id6446677275)

This app analyzes Apple Watch sensor data to provide a sleep quality score. It offers detailed insights into sleep stages, heart rate, and weekly trends, helping users understand and improve their rest habits.

**Highlights:** Sleep quality scoring, Detailed sleep stage analysis (light, deep, REM), Heart rate monitoring, Weekly trend tracking, Sleep bank concept for habit analysis, Apple Health integration

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sleep Score Premium Yearly | $9.99 | per year |
| Sleep Score Premium Yearly | $29.99 | per year |


## Frequently asked questions

### Is Sleep Time+ Cycle Alarm Clock free?

Sleep Time+ Cycle Alarm Clock is free to download, with in-app purchases available.

### Is REM Sleep Tracker free?

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

### Which has better reviews, Sleep Time+ Cycle Alarm Clock or REM Sleep Tracker?

Sleep Time+ Cycle Alarm Clock is rated higher. Sleep Time+ Cycle Alarm Clock averages 4.8 out of 5 from 2.5K ratings, while REM Sleep Tracker averages 4.2 from 49 ratings.

### Do Sleep Time+ Cycle Alarm Clock or REM Sleep Tracker have ads?

Sleep Time+ Cycle Alarm Clock shows ads; REM Sleep Tracker does not.

### Which is updated more often, Sleep Time+ Cycle Alarm Clock or REM Sleep Tracker?

Sleep Time+ Cycle Alarm Clock ships an update monthly, and REM Sleep Tracker every 2 weeks. Most recently, Sleep Time+ Cycle Alarm Clock was updated on November 1, 2026 and REM Sleep Tracker on November 3, 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.*