# CogState vs F

The clearest difference is price: CogState at Free against F's $149.99. CogState also leads on rating (5.0 vs 4.4) and iOS requirement (9.0 vs 15.6). F's advantage is ratings volume (8 vs 1). On update cadence, ads, in-app purchases and device support there is nothing between them.

CogState is free to download; F costs $149.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CogState holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: F has 8 ratings behind it against 1, so its average is the more settled of the two.

CogState ships an update every 2 months, F every 4 months. The most recent releases landed on October 14, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | CogState | F |
| --- | --- | --- |
| Price | **Free** | $149.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cogstate/id599475522/reviews)** | [4.4 (8 ratings)](https://appshunter.io/ios/app/f-stac/id1014974144/reviews) |
| Number of ratings | 1 | **8** |
| Positive reviews | — | 85.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | **Free** | Paid |
| Size | 225 MB | 54 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPad | iPad |
| Age rating | 17+ | 4+ |
| Developer | [CogState Inc](https://appshunter.io/developer/599475525) | [Cognitive Innovations LLC](https://appshunter.io/developer/788770952) |

## What reviewers say

### CogState

[App page](https://appshunter.io/ios/app/cogstate/id599475522)

This academically oriented software offers researchers a powerful and sensitive method for testing cognition. It utilizes culture-neutral stimuli to detect cognitive changes in subjects over time, with validity demonstrated in numerous peer-reviewed articles.

**Highlights:** Academically oriented cognitive testing, Sensitive detection of cognitive change, Culture-neutral stimuli, Validated in peer-reviewed articles, Baseline and periodic retesting

**Features:** macOS Compatibility

**In-app purchases:** none


### F

[App page](https://appshunter.io/ios/app/f-stac/id1014974144)

This tool offers a standardized cognitive screening through 14 functional tasks. It integrates real-life distractions to assess cognitive abilities and performance breakdowns in various domains. Clinicians can observe clients performing tasks from simple to complex.

**Highlights:** 14 functional tasks, Real-life distractions integration, Cognitive domain assessment, Functional performance reporting, Clinician observation tool, Money management tasks, Medication management tasks

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CogState free?

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

### Is F free?

F costs $149.99, with no in-app purchases.

### Which has better reviews, CogState or F?

CogState is rated higher. CogState averages 5.0 out of 5 from 1 ratings, while F averages 4.4 from 8 ratings.

### Do CogState or F have ads?

Neither CogState nor F shows ads.

### Which is updated more often, CogState or F?

CogState ships an update every 2 months, and F every 4 months. Most recently, CogState was updated on October 14, 2026 and F on October 13, 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.*