# 待办鸭 vs NULL Memo

The clearest difference is in-app purchases: 待办鸭 at none against NULL Memo's 1. NULL Memo's advantage is update cadence (daily vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. NULL Memo sells 1 one-off in-app purchase. 待办鸭 asks for nothing beyond the download.

待办鸭 ships an update fortnightly, NULL Memo daily. The most recent releases landed on September 1, 2026 and July 23, 2026 respectively.

## The numbers

| Metric | 待办鸭 | NULL Memo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Daily** |
| Size | 3 MB | 60 MB |
| Requires iOS | 17.6 | **16.6** |
| Devices | **iPhone, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [朝峰 陈](https://appshunter.io/developer/1868597907) | [Aaron Chan](https://appshunter.io/developer/1888707957) |

## What reviewers say

### 待办鸭

[App page](https://appshunter.io/ios/app/and/id6757746591)

**Features:** Vision Pro support

**In-app purchases:** none


### 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 待办鸭 free?

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

### Is NULL Memo free?

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

### Do 待办鸭 or NULL Memo have ads?

Neither 待办鸭 nor NULL Memo shows ads.

### Which is updated more often, 待办鸭 or NULL Memo?

待办鸭 ships an update fortnightly, and NULL Memo daily. Most recently, 待办鸭 was updated on September 1, 2026 and NULL Memo on July 23, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*