# Muon vs NULL Memo

The clearest difference is update cadence: NULL Memo at daily against Muon's every 5 days. NULL Memo also leads on iOS requirement (16.6 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Muon sells 2 in-app purchases, starting at $6.99 per month and NULL Memo sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Muon ships an update every 5 days, NULL Memo daily. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Muon | NULL Memo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | **Daily** |
| Size | 10 MB | 60 MB |
| Requires iOS | 26.0 | **16.6** |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ReNALNE.inc](https://appshunter.io/developer/1642420696) | [Aaron Chan](https://appshunter.io/developer/1888707957) |

## What reviewers say

### Muon

[App page](https://appshunter.io/ios/app/muon-ai-voice-recorder-notes/id6760449351)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Muon Pro 月額 | $6.99 | per month |
| Muon Pro 年額 | $54.99 | per year |


### NULL Memo

[App page](https://appshunter.io/ios/app/null-memo-ideas-notes-lists/id6761292505)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NULL Memo Pro | $2.99 | one-time |


## Frequently asked questions

### Is Muon free?

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

### Is NULL Memo free?

NULL Memo is free to download, with in-app purchases available.

### Do Muon or NULL Memo have ads?

Neither Muon nor NULL Memo shows ads.

### Which is updated more often, Muon or NULL Memo?

Muon ships an update every 5 days, and NULL Memo daily. Most recently, Muon was updated on October 24, 2026 and NULL Memo on October 28, 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.*