# TrueNoiser vs Cathier

The clearest difference is price: Cathier at Free against TrueNoiser's $0.99. Cathier also leads on in-app purchases (none vs 1). TrueNoiser's advantage is iOS requirement (12.0 vs 18.6). On update cadence, ads and device support there is nothing between them.

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

TrueNoiser ships an update every 2 weeks, Cathier every 3 weeks. The most recent releases landed on October 17, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | TrueNoiser | Cathier |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/truenoiser/id6499069241/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free | — |
| Size | 143 MB | 8 MB |
| Requires iOS | **12.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Powerless Co., Ltd](https://appshunter.io/developer/1738728750) | [Jian Shuo Wang](https://appshunter.io/developer/1207762354) |

## What reviewers say

### 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 |


### Cathier

[App page](https://appshunter.io/ios/app/cathier/id6760601647)

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

**In-app purchases:** none


## Frequently asked questions

### Is TrueNoiser free?

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

### Is Cathier free?

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

### Do TrueNoiser or Cathier have ads?

Neither TrueNoiser nor Cathier shows ads.

### Which is updated more often, TrueNoiser or Cathier?

TrueNoiser ships an update every 2 weeks, and Cathier every 3 weeks. Most recently, TrueNoiser was updated on October 17, 2026 and Cathier on October 10, 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.*