# NightWatch vs Sleep Harmony

The clearest difference is in-app purchases: Sleep Harmony at none against NightWatch's 1. Sleep Harmony also leads on ads (none vs shown). NightWatch's advantage is update cadence (monthly vs every 7 months). On price, device support and iOS requirement there is nothing between them.

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

NightWatch ships an update monthly, Sleep Harmony every 7 months. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | NightWatch | Sleep Harmony |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 7 months |
| Size | 6 MB | 144 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pummel Pty Ltd](https://appshunter.io/developer/1101016793) | [Ergomotion, Inc.](https://appshunter.io/developer/765697157) |

## What reviewers say

### NightWatch

[App page](https://appshunter.io/ios/app/nightwatch-sleep-tracker/id6469570238)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | one-time |


### Sleep Harmony

[App page](https://appshunter.io/ios/app/sleep-harmony/id6743784636)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NightWatch free?

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

### Is Sleep Harmony free?

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

### Do NightWatch or Sleep Harmony have ads?

NightWatch shows ads; Sleep Harmony does not.

### Which is updated more often, NightWatch or Sleep Harmony?

NightWatch ships an update monthly, and Sleep Harmony every 7 months. Most recently, NightWatch was updated on October 25, 2026 and Sleep Harmony on October 30, 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.*