# 专注小僧 vs NULL Memo

The clearest difference is update cadence: NULL Memo at daily against 专注小僧's every 28 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 专注小僧 sells 1 one-off in-app purchase and NULL Memo sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

专注小僧 ships an update every 28 months, NULL Memo daily. The most recent releases landed on October 6, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | 专注小僧 | NULL Memo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Daily** |
| Size | 28 MB | 60 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [宏泽 迟](https://appshunter.io/developer/1610825237) | [Aaron Chan](https://appshunter.io/developer/1888707957) |

## What reviewers say

### 专注小僧

[App page](https://appshunter.io/ios/app/id6448859021)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 专注小僧永久会员 | $6.99 | one-time |


### 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 专注小僧 free?

专注小僧 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 专注小僧 or NULL Memo have ads?

Neither 专注小僧 nor NULL Memo shows ads.

### Which is updated more often, 专注小僧 or NULL Memo?

专注小僧 ships an update every 28 months, and NULL Memo daily. Most recently, 专注小僧 was updated on October 6, 2026 and NULL Memo on October 1, 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.*