# JotShelf vs SixDo

The clearest difference is price: SixDo at Free against JotShelf's $1.99. SixDo also leads on update cadence (every 3 weeks vs every 4 months) and iOS requirement (16.0 vs 18.6). JotShelf's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

SixDo is free to download; JotShelf costs $1.99 up front. SixDo sells 1 one-off in-app purchase. JotShelf asks for nothing beyond the download.

JotShelf ships an update every 4 months, SixDo every 3 weeks. The most recent releases landed on October 31, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | JotShelf | SixDo |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Size | 7 MB | 32 MB |
| Requires iOS | 18.6 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Marko Zamurovic](https://appshunter.io/developer/1876493192) | [mami hara](https://appshunter.io/developer/6792413290) |

## What reviewers say

### JotShelf

[App page](https://appshunter.io/ios/app/jotshelf/id6760388919)

**In-app purchases:** none


### SixDo

[App page](https://appshunter.io/ios/app/sixdo-ivy-lee-method-to-do/id6797027631)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SixDo Pro | $3.99 | one-time |


## Frequently asked questions

### Is JotShelf free?

JotShelf costs $1.99, with no in-app purchases.

### Is SixDo free?

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

### Do JotShelf or SixDo have ads?

Neither JotShelf nor SixDo shows ads.

### Which is updated more often, JotShelf or SixDo?

JotShelf ships an update every 4 months, and SixDo every 3 weeks. Most recently, JotShelf was updated on October 31, 2026 and SixDo on October 26, 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.*