# UnTask vs Impossible Notes

The clearest difference is in-app purchases: Impossible Notes at none against UnTask's 1. Impossible Notes also leads on iOS requirement (15.1 vs 26.0). UnTask's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. UnTask sells 1 one-off in-app purchase. Impossible Notes asks for nothing beyond the download.

UnTask ships an update fortnightly, Impossible Notes every 2 weeks. The most recent releases landed on September 15, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | UnTask | Impossible Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 2 weeks |
| Size | 32 MB | 6 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AI Garden Ltd](https://appshunter.io/developer/1845207591) | [Storq Labs BV](https://appshunter.io/developer/1864178327) |

## What reviewers say

### UnTask

[App page](https://appshunter.io/ios/app/untask-one-at-a-time/id6756929483)

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Premium Features | $4.99 | one-time |


### Impossible Notes

[App page](https://appshunter.io/ios/app/impossible-notes/id6757008307)

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

**In-app purchases:** none


## Frequently asked questions

### Is UnTask free?

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

### Is Impossible Notes free?

Impossible Notes is free to download, with no in-app purchases.

### Do UnTask or Impossible Notes have ads?

Impossible Notes shows ads; UnTask does not.

### Which is updated more often, UnTask or Impossible Notes?

UnTask ships an update fortnightly, and Impossible Notes every 2 weeks. Most recently, UnTask was updated on September 15, 2026 and Impossible Notes on September 10, 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.*