# PriorityStack vs SixDo

The clearest difference is ads: SixDo at none against PriorityStack's shown. SixDo also leads on update cadence (every 3 weeks vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. PriorityStack sells 1 in-app purchase, starting at $2.99 per month and SixDo sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

PriorityStack ships an update every 2 months, SixDo every 3 weeks. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | PriorityStack | SixDo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 28 MB | 32 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tabish Hassan](https://appshunter.io/developer/1885918100) | [mami hara](https://appshunter.io/developer/6792413290) |

## What reviewers say

### PriorityStack

[App page](https://appshunter.io/ios/app/prioritystack-top-six/id6766623918)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PriorityStack Premium Monthly | $2.99 | per month |


### 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 | $6.99 | one-time |


## Frequently asked questions

### Is PriorityStack free?

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

### Is SixDo free?

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

### Do PriorityStack or SixDo have ads?

PriorityStack shows ads; SixDo does not.

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

PriorityStack ships an update every 2 months, and SixDo every 3 weeks. Most recently, PriorityStack was updated on October 6, 2026 and SixDo on October 4, 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.*