# 睡眠FM vs TrueNoiser

The clearest difference is price: 睡眠FM at Free against TrueNoiser's $0.99. 睡眠FM also leads on in-app purchases (none vs 1). TrueNoiser's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 6 weeks). On rating, ratings volume and device support there is nothing between them.

睡眠FM is free to download; TrueNoiser costs $0.99 up front. TrueNoiser sells 1 one-off in-app purchase. 睡眠FM asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for 睡眠FM against 5.0 for TrueNoiser. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

睡眠FM ships an update every 6 weeks, TrueNoiser every 2 weeks. The most recent releases landed on June 11, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | 睡眠FM | TrueNoiser |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/fm/id6449446299/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/truenoiser/id6499069241/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 397 MB | 143 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Hefei Zhang Yu Intelligent Technology Co., Ltd.](https://appshunter.io/developer/1189870243) | [powerless](https://appshunter.io/developer/1738728750) |

## What reviewers say

### 睡眠FM

[App page](https://appshunter.io/ios/app/fm/id6449446299)

This app offers a variety of high-quality natural sounds like rain, wind, and ocean waves to aid sleep, relaxation, and focus. Its minimalist design and user-friendly interface make it easy to create a calming atmosphere for any situation, from bedtime to study sessions.

**Highlights:** Diverse natural sound library, High-quality, professional sound effects, Simple and intuitive interface, No login or registration required, Ideal for sleep, relaxation, and concentration

**In-app purchases:** none


### TrueNoiser

[App page](https://appshunter.io/ios/app/truenoiser/id6499069241)

This app offers a tranquil escape with a variety of natural sounds and high-quality audio. It's designed to help users relax, improve focus for work or study, and enhance sleep quality.

**Highlights:** Retro interface design, Variety of natural sounds, High-quality audio recordings, Sleep assistance soundscapes, Ad-free experience, Improved focus for work/study

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pass Card | Free | one-time |


## Frequently asked questions

### Is 睡眠FM free?

睡眠FM is free to download, with no in-app purchases.

### Is TrueNoiser free?

TrueNoiser costs $0.99, and also offers in-app purchases.

### Which has better reviews, 睡眠FM or TrueNoiser?

睡眠FM and TrueNoiser are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do 睡眠FM or TrueNoiser have ads?

睡眠FM shows ads; TrueNoiser does not.

### Which is updated more often, 睡眠FM or TrueNoiser?

睡眠FM ships an update every 6 weeks, and TrueNoiser every 2 weeks. Most recently, 睡眠FM was updated on June 11, 2026 and TrueNoiser on September 13, 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.*