# 曙 MUSE FEATHER vs 觀心筆記

The clearest difference is update cadence: 觀心筆記 at every 4 days against 曙 MUSE FEATHER's every 15 months. 曙 MUSE FEATHER's advantage is iOS requirement (11.0.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

曙 MUSE FEATHER ships an update every 15 months, 觀心筆記 every 4 days. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 曙 MUSE FEATHER | 觀心筆記 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 4 days** |
| Size | 17 MB | 15 MB |
| Requires iOS | **11.0.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Flaps Technology Corporation](https://appshunter.io/developer/1156409606) | [Cheng Wei Huang](https://appshunter.io/developer/1896184925) |

## What reviewers say

### 曙 MUSE FEATHER

[App page](https://appshunter.io/ios/app/muse-feather/id1663740176)

**Features:** macOS Compatibility

**In-app purchases:** none


### 觀心筆記

[App page](https://appshunter.io/ios/app/id6793128406)

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

**In-app purchases:** none


## Frequently asked questions

### Is 曙 MUSE FEATHER free?

曙 MUSE FEATHER is free to download, with no in-app purchases.

### Is 觀心筆記 free?

觀心筆記 is free to download, with no in-app purchases.

### Do 曙 MUSE FEATHER or 觀心筆記 have ads?

Neither 曙 MUSE FEATHER nor 觀心筆記 shows ads.

### Which is updated more often, 曙 MUSE FEATHER or 觀心筆記?

曙 MUSE FEATHER ships an update every 15 months, and 觀心筆記 every 4 days. Most recently, 曙 MUSE FEATHER was updated on October 2, 2026 and 觀心筆記 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.*