# FourierSleep — Private Snore Sleep Tracker

> Private Snore Sleep Tracker (iPhone/iPad app by TANG CHENGJUN.)

- Source: https://appshunter.io/ios/app/fouriersleep/id6761359040 (this page in markdown: same URL + `.md`)
- Developer: [TANG CHENGJUN](https://appshunter.io/developer/1887430333)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 18 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, Korean, Brazilian Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2026-04-01
- Data updated: 2026-07-02
- User reviews in markdown: https://appshunter.io/ios/app/fouriersleep/id6761359040/reviews.md

## What is FourierSleep?

FourierSleep is a snore-focused sleep recording app that helps you understand your night with clear, actionable reports. Place your iPhone near your bed, start a session before sleep, and review your results in the morning.

Key Features
- 100% on-device analysis: recording and detection stay on your iPhone by default.
- Smart snore detection: identifies snore events using STFT/FFT spectral analysis.
- Morning report: view total snore duration, event count, intensity distribution, and key periods.
- Night timeline: review changes across the night and spot high-intensity segments quickly.
- Trend tracking: monitor weekly/monthly patterns to see how your sleep is changing.
- Flexible recording: supports manual start/stop and nightly schedule reminders.
- Data control: export/import and local cleanup tools keep you in control.
- Pro upgrade: unlock 30-day, 3-month, and 1-year trends with deeper insights.

FourierSleep is for wellness tracking and habit improvement. It is not a medical diagnosis or treatment tool.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock PRO | $4.99 | one-time |



## Version history (last 2 releases)

### 1.1 — 2026-04-02

Improve the user experience for the PRO version

### 1.0 — 2026-04-01

No release notes.

## More apps by TANG CHENGJUN

- [Mindful Momentum](https://appshunter.io/ios/app/mindful-momentum/id6761034522)
- [AI Markdown Notes - WASHINOTE](https://appshunter.io/ios/app/ai-markdown-notes-washinote/id6761606664)
- [Hike Log & Replay - Trailfold](https://appshunter.io/ios/app/hike-log-and-replay-trailfold/id6762639973)

All apps by TANG CHENGJUN: https://appshunter.io/developer/1887430333

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-02.*