# Sleep Harmony vs Sleep Memo

The clearest difference is in-app purchases: Sleep Harmony at none against Sleep Memo's 1. Sleep Harmony also leads on ads (none vs shown) and iOS requirement (15.6 vs 17.0). Sleep Memo's advantage is update cadence (every 6 weeks vs every 7 months). On price and device support there is nothing between them.

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

Sleep Harmony ships an update every 7 months, Sleep Memo every 6 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Sleep Harmony | Sleep Memo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 6 weeks** |
| Size | 144 MB | 5 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ergomotion, Inc.](https://appshunter.io/developer/765697157) | [丽佳 施](https://appshunter.io/developer/1894580777) |

## What reviewers say

### Sleep Harmony

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Sleep Memo

[App page](https://appshunter.io/ios/app/sleep-memo-sleep-tracker/id6794161861)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is Sleep Harmony free?

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

### Is Sleep Memo free?

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

### Do Sleep Harmony or Sleep Memo have ads?

Sleep Memo shows ads; Sleep Harmony does not.

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

Sleep Harmony ships an update every 7 months, and Sleep Memo every 6 weeks. Most recently, Sleep Harmony was updated on October 30, 2026 and Sleep Memo on October 31, 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.*