# OpenSleep vs Night Ledger

The clearest difference is in-app purchases: Night Ledger at none against OpenSleep's 1. Night Ledger also leads on ratings volume (6 vs 1) and iOS requirement (18.0 vs 26.0). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. OpenSleep sells 1 one-off in-app purchase. Night Ledger asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for OpenSleep against 5.0 for Night Ledger. That said, the two scores are not equally well evidenced: Night Ledger has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

OpenSleep ships an update every 2 weeks, Night Ledger every 3 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | OpenSleep | Night Ledger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/opensleep-sleep-tracker-and-ai/id6775201826/reviews) | [5.0 (6 ratings)](https://appshunter.io/ios/app/night-ledger/id6803367661/reviews) |
| Number of ratings | 1 | **6** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 58 MB | 2 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 12+ |
| Developer | [Yuan Qian](https://appshunter.io/developer/1894474763) | [Auster Chen](https://appshunter.io/developer/1875774145) |

## What reviewers say

### OpenSleep

[App page](https://appshunter.io/ios/app/opensleep-sleep-tracker-and-ai/id6775201826)

This app offers a privacy-focused, offline sleep tracker and AI coach. It analyzes your sleep patterns locally on your device, synchronizes with Apple Health, and provides detailed insights without sending any data to servers.

**Highlights:** Offline sleep tracking, Local AI sleep coach, Apple Health synchronization, Sleep cycle and stage analysis, Privacy-first, serverless design, Detailed sleep history

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpenSleep Lifetime Premium | $2.99 | one-time |


### Night Ledger

[App page](https://appshunter.io/ios/app/night-ledger/id6803367661)

This private sleep diary helps you understand your sleep patterns to improve sleep quality. Log your sleep, track trends, and export reports to share with healthcare professionals. All data remains securely on your device.

**Highlights:** Log sleep patterns, Personal sleep history, Exportable reports (PDF, CSV, JSON), Trend analysis (14, 28, 90 days), Local reminders, Designed for clinical workflows

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenSleep free?

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

### Is Night Ledger free?

Night Ledger is free to download, with no in-app purchases.

### Which has better reviews, OpenSleep or Night Ledger?

OpenSleep and Night Ledger are both rated 5.0 out of 5 on the App Store, from 1 and 6 ratings respectively.

### Do OpenSleep or Night Ledger have ads?

Neither OpenSleep nor Night Ledger shows ads.

### Which is updated more often, OpenSleep or Night Ledger?

OpenSleep ships an update every 2 weeks, and Night Ledger every 3 weeks. Most recently, OpenSleep was updated on November 5, 2026 and Night Ledger 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.*