# Double memo vs Quad Memo

The clearest difference is price: Double memo at Free against Quad Memo's $2.99. Double memo also leads on update cadence (every 2 weeks vs every 4 months) and iOS requirement (15.8.3 vs 17.6). Quad Memo's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

Double memo is free to download; Quad Memo costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Double memo ships an update every 2 weeks, Quad Memo every 4 months. The most recent releases landed on September 16, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Double memo | Quad Memo |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 4 months |
| Size | 37 MB | 2 MB |
| Requires iOS | **15.8.3** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Shun Isayama](https://appshunter.io/developer/1578976556) |

## What reviewers say

### Double memo

[App page](https://appshunter.io/ios/app/double-memo/id6502283245)

**Features:** macOS Compatibility

**In-app purchases:** none


### Quad Memo

[App page](https://appshunter.io/ios/app/quad-memo/id6755368825)

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

**In-app purchases:** none


## Frequently asked questions

### Is Double memo free?

Double memo is free to download, with no in-app purchases.

### Is Quad Memo free?

Quad Memo costs $2.99, with no in-app purchases.

### Do Double memo or Quad Memo have ads?

Double memo shows ads; Quad Memo does not.

### Which is updated more often, Double memo or Quad Memo?

Double memo ships an update every 2 weeks, and Quad Memo every 4 months. Most recently, Double memo was updated on September 16, 2026 and Quad Memo on September 8, 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.*