# Sleep Tracker vs NAOs　公式アプリ

The clearest difference is in-app purchases: NAOs　公式アプリ at none against Sleep Tracker's 18. NAOs　公式アプリ also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). Sleep Tracker's advantage is update cadence (every 3 weeks vs every 38 months). On price and device support there is nothing between them.

Both are free to download. Sleep Tracker sells 16 in-app purchases, starting at $4.99 per month. NAOs　公式アプリ asks for nothing beyond the download.

Sleep Tracker ships an update every 3 weeks, NAOs　公式アプリ every 38 months. The most recent releases landed on November 1, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Sleep Tracker | NAOs　公式アプリ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (8K ratings)](https://appshunter.io/ios/app/sleep-tracker-recorder-sound/id1551928101/reviews)** | — |
| Number of ratings | **8K** | — |
| Positive reviews | 49.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 38 months |
| Monetization | Free with in-app purchases | — |
| Size | 206 MB | 41 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Leap Health](https://appshunter.io/developer/1687598595) | [KITAMURA NAOHIRO](https://appshunter.io/developer/1573328604) |

## What reviewers say

### Sleep Tracker

[App page](https://appshunter.io/ios/app/sleep-tracker-recorder-sound/id1551928101)

This intelligent sleep assistant helps you understand your sleep patterns with detailed analysis and recordings of snoring or sleep talking. It offers a library of relaxation tools, including meditation and sleep stories, to improve sleep quality and features a smart alarm to help you wake up refreshed.

**Highlights:** Sleep cycle analysis, Snore and sleep talk recording, Meditation and sleep stories, Soothing sounds and white noise, Smart alarm clock, Sleep notes and mood logging, Apple Health sync

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (16)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $4.99 | per month |
| Quarterly Premium | $9.99 | per 3 months |
| Annual Purchase | $9.99 | per year |
| Monthly Premium | $9.99 | per month |
| Annual Purchase | $11.99 | per year |
| Monthly Premium | $12.49 | per month |
| Annual Purchase | $14.99 | per year |
| Monthly Premium | $14.99 | per month |
| Annual Purchase | $17.99 | per year |
| Premium Yearly | $19.99 | per year |
| Annual Purchase | $19.99 | per year |
| Quarterly Premium | $19.99 | per 3 months |
| Annual Purchase | $23.99 | per year |
| Annual Purchase | $29.99 | per year |
| Annual Purchase | $39.99 | per year |
| Annual Purchase | $39.99 | per year |

**What reviewers like**

- 🚀 Works now and user loves it
- 👍 Great app, fully genuine sleep tracker
- 👍 Helps user sleep better
- 👍 Gives insight into sleep quality
- 👍 Accurate most of the time

**What reviewers complain about**

- 🐛 Inaccurate, doesn't record wake-ups
- 🔋 Drains phone battery
- 💰 Too many features locked behind paywall
- 🐛 Recordings are just static
- 🐛 Doesn't always record sleep accurately

**Reported bugs**

- Recordings only allow 3 free clips
- Doesn't record wake-ups and movements accurately
- Alarm doesn't always work
- Charges during free trial period

**Requested features**

- Ability to filter out white noise and record actual sleep-talk/snoring
- Option to disable bedtime feature for shift workers
- Integration with smart home devices to adjust sleep environment
- Social sleep challenges with friends
- Personalized sleep coaching


### NAOs　公式アプリ

[App page](https://appshunter.io/ios/app/naos/id1573328602)

**In-app purchases:** none


## Frequently asked questions

### Is Sleep Tracker free?

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

### Is NAOs　公式アプリ free?

NAOs　公式アプリ is free to download, with no in-app purchases.

### Do Sleep Tracker or NAOs　公式アプリ have ads?

Sleep Tracker shows ads; NAOs　公式アプリ does not.

### Which is updated more often, Sleep Tracker or NAOs　公式アプリ?

Sleep Tracker ships an update every 3 weeks, and NAOs　公式アプリ every 38 months. Most recently, Sleep Tracker was updated on November 1, 2026 and NAOs　公式アプリ on September 19, 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.*