# NightWell vs REM Sleep Tracker

The clearest difference is review sentiment: NightWell at 60% against REM Sleep Tracker's 0%. NightWell also leads on rating (4.6 vs 4.2). REM Sleep Tracker's advantage is ads (none vs shown) and ratings volume (49 vs 16). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. NightWell sells 11 in-app purchases, starting at $9.99 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.

NightWell holds the better App Store score, 4.6 against 4.2. Both are backed by a comparable volume of ratings — 16 and 49 respectively. Written reviews point the same way: 60% of NightWell's written reviews are positive against 0% of REM Sleep Tracker's.

NightWell ships an update every 3 weeks, REM Sleep Tracker every 2 weeks. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | NightWell | REM Sleep Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (16 ratings)](https://appshunter.io/ios/app/nightwellsmart-sleep-tracker/id827600695/reviews)** | [4.2 (49 ratings)](https://appshunter.io/ios/app/rem-sleep-tracker/id6446677275/reviews) |
| Number of ratings | 16 | **49** |
| Positive reviews | **59.7% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 121 MB | 25 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [株式会社C2](https://appshunter.io/developer/597389977) | [Nicola Eusebi](https://appshunter.io/developer/737311863) |

## What reviewers say

### NightWell

[App page](https://appshunter.io/ios/app/nightwellsmart-sleep-tracker/id827600695)

This smart sleep companion helps you track sleep patterns, monitor snoring, and wake up gently with intelligent alarms. Gain personalized insights to improve rest, energy, and focus, with calming sounds and mindful tips for relaxation before bed.

**Highlights:** Sleep pattern tracking, Snoring monitoring, Intelligent smart alarm, Personalized sleep insights, Calming lull sounds, Sleep reports, Cloud backup

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $9.99 | per month |
| Yearly | $39.99 | per year |
| Ad Removal (7 Days) | $0.49 | one-time |
| Alarm sound "Minute Waltz" | $0.99 | one-time |
| Lull Sound "Berceuse Op. 57" | $0.99 | one-time |
| Alarm sound "Time for relax" | $0.99 | one-time |
| Alarm sound "Slumber" | $0.99 | one-time |
| Alarm sound "Piscatio" | $0.99 | one-time |
| Lull Sound "Kagura" | $0.99 | one-time |
| Alarm sound "Peer Gynt Morgenstemning Op.46  w/ES " | $0.99 | one-time |
| Alarm sound "Nocturne No.2" | $0.99 | one-time |


### 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 NightWell free?

NightWell 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, NightWell or REM Sleep Tracker?

NightWell is rated higher. NightWell averages 4.6 out of 5 from 16 ratings, while REM Sleep Tracker averages 4.2 from 49 ratings.

### Do NightWell or REM Sleep Tracker have ads?

NightWell shows ads; REM Sleep Tracker does not.

### Which is updated more often, NightWell or REM Sleep Tracker?

NightWell ships an update every 3 weeks, and REM Sleep Tracker every 2 weeks. Most recently, NightWell was updated on October 29, 2026 and REM Sleep Tracker on October 24, 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.*