# Cognitive Diary vs Untwist

Cognitive Diary and Untwist are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Cognitive Diary sells 2 in-app purchases, starting at $0.99 per month and Untwist sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Cognitive Diary ships an update fortnightly, Untwist every 8 days. The most recent releases landed on October 13, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Cognitive Diary | Untwist |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 8 days** |
| Size | 60 MB | 28 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [Vitalii Kovalov](https://appshunter.io/developer/1864691271) | [Osman Seven](https://appshunter.io/developer/1875631963) |

## What reviewers say

### Cognitive Diary

[App page](https://appshunter.io/ios/app/cognitive-diary/id6757118591)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO | $0.99 | per month |
| PRO | $9.99 | per year |


### Untwist

[App page](https://appshunter.io/ios/app/untwist-overthinking-journal/id6759801461)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Yearly | $39.99 | per year |


## Frequently asked questions

### Is Cognitive Diary free?

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

### Is Untwist free?

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

### Do Cognitive Diary or Untwist have ads?

Neither Cognitive Diary nor Untwist shows ads.

### Which is updated more often, Cognitive Diary or Untwist?

Cognitive Diary ships an update fortnightly, and Untwist every 8 days. Most recently, Cognitive Diary was updated on October 13, 2026 and Untwist on October 24, 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.*