# Moo FM vs Serene Whisper

The clearest difference is update cadence: Serene Whisper at every 6 days against Moo FM's every 4 weeks. Moo FM's advantage is iOS requirement (14.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Moo FM sells 1 one-off in-app purchase and Serene Whisper sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Moo FM ships an update every 4 weeks, Serene Whisper every 6 days. The most recent releases landed on November 3, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Moo FM | Serene Whisper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (5 ratings)](https://appshunter.io/ios/app/moo-fm/id1609198119/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 275 MB | 59 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Hunan 1MHz Technology Co., Ltd.](https://appshunter.io/developer/1501646722) | [博 彭](https://appshunter.io/developer/1293268076) |

## What reviewers say

### Moo FM

[App page](https://appshunter.io/ios/app/moo-fm/id1609198119)

This app provides music for focus, sleep, relaxation, and inspiration. It features animations, looping options for songs or playlists, and a sleep timer for bedtime use.

**Highlights:** Music for focus, Music for sleep, Relaxation music, Inspirational music, Animated visuals, Playlist looping, Sleep timer

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Moo Pro Lifetime | $2.99 | one-time |


### Serene Whisper

[App page](https://appshunter.io/ios/app/serene-whisper/id6503193688)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro user | $1.99 | one-time |


## Frequently asked questions

### Is Moo FM free?

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

### Is Serene Whisper free?

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

### Do Moo FM or Serene Whisper have ads?

Neither Moo FM nor Serene Whisper shows ads.

### Which is updated more often, Moo FM or Serene Whisper?

Moo FM ships an update every 4 weeks, and Serene Whisper every 6 days. Most recently, Moo FM was updated on November 3, 2026 and Serene Whisper on October 27, 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.*