# F vs MEMORY Karman Line

The clearest difference is price: MEMORY Karman Line at Free against F's $149.99. MEMORY Karman Line also leads on device support (3 vs 1). F's advantage is update cadence (every 4 months vs every 26 months). On ads, in-app purchases and iOS requirement there is nothing between them.

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

F ships an update every 4 months, MEMORY Karman Line every 26 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | F | MEMORY Karman Line |
| --- | --- | --- |
| Price | $149.99 | **Free** |
| Rating | **[4.4 (8 ratings)](https://appshunter.io/ios/app/f-stac/id1014974144/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 26 months |
| Monetization | Paid | — |
| Size | 54 MB | 104 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Cognitive Innovations LLC](https://appshunter.io/developer/788770952) | [Yellow Riders](https://appshunter.io/developer/1209479274) |

## What reviewers say

### 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


### MEMORY Karman Line

[App page](https://appshunter.io/ios/app/memory-karman-line/id6503296311)

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

**In-app purchases:** none


## Frequently asked questions

### Is F free?

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

### Is MEMORY Karman Line free?

MEMORY Karman Line is free to download, with no in-app purchases.

### Do F or MEMORY Karman Line have ads?

Neither F nor MEMORY Karman Line shows ads.

### Which is updated more often, F or MEMORY Karman Line?

F ships an update every 4 months, and MEMORY Karman Line every 26 months. Most recently, F was updated on October 24, 2026 and MEMORY Karman Line on October 25, 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.*