# NULL Memo vs Idea Notes

The clearest difference is ads: NULL Memo at none against Idea Notes's shown. NULL Memo also leads on update cadence (daily vs every 3 weeks) and iOS requirement (16.6 vs 18.6). On price, in-app purchases and device support there is nothing between them.

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

NULL Memo ships an update daily, Idea Notes every 3 weeks. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | NULL Memo | Idea Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 3 weeks |
| Size | 60 MB | 34 MB |
| Requires iOS | **16.6** | 18.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Aaron Chan](https://appshunter.io/developer/1888707957) | [RYOTA SUZUKI](https://appshunter.io/developer/1726784326) |

## What reviewers say

### 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 |


### Idea Notes

[App page](https://appshunter.io/ios/app/idea-notes-quick-capture/id6764063809)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Plan | $12.99 | one-time |


## Frequently asked questions

### Is NULL Memo free?

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

### Is Idea Notes free?

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

### Do NULL Memo or Idea Notes have ads?

Idea Notes shows ads; NULL Memo does not.

### Which is updated more often, NULL Memo or Idea Notes?

NULL Memo ships an update daily, and Idea Notes every 3 weeks. Most recently, NULL Memo was updated on October 31, 2026 and Idea Notes on October 25, 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.*