# ZattaMemo vs Task Biyori

The clearest difference is ads: ZattaMemo at none against Task Biyori's shown. Task Biyori's advantage is update cadence (every 3 days vs every 3 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. ZattaMemo sells 1 one-off in-app purchase and Task Biyori sells 1 in-app purchase, starting at $0.49 per month. Whichever you choose, the download price is not the number that matters.

ZattaMemo ships an update every 3 weeks, Task Biyori every 3 days. The most recent releases landed on October 13, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | ZattaMemo | Task Biyori |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Size | 3 MB | 14 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Tatsuyoshi Sasaki](https://appshunter.io/developer/1888368184) | [Yuki Takeuchi](https://appshunter.io/developer/1587906985) |

## What reviewers say

### ZattaMemo

[App page](https://appshunter.io/ios/app/zattamemo/id6761243555)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ZattaMemo Upgrade | $3.99 | one-time |


### Task Biyori

[App page](https://appshunter.io/ios/app/task-biyori-to-do-planner/id6784294886)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン | $0.49 | per month |


## Frequently asked questions

### Is ZattaMemo free?

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

### Is Task Biyori free?

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

### Do ZattaMemo or Task Biyori have ads?

Task Biyori shows ads; ZattaMemo does not.

### Which is updated more often, ZattaMemo or Task Biyori?

ZattaMemo ships an update every 3 weeks, and Task Biyori every 3 days. Most recently, ZattaMemo was updated on October 13, 2026 and Task Biyori on October 14, 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.*