# Linus Tester vs MEMORY Karman Line

The clearest difference is update cadence: Linus Tester at every 2 months against MEMORY Karman Line's every 26 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Linus Tester ships an update every 2 months, MEMORY Karman Line every 26 months. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Linus Tester | MEMORY Karman Line |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (4 ratings)](https://appshunter.io/ios/app/linus-tester/id1523340677/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 26 months |
| Monetization | Free | — |
| Size | 202 MB | 104 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Linus Health, Inc.](https://appshunter.io/developer/1481489335) | [Yellow Riders](https://appshunter.io/developer/1209479274) |

## What reviewers say

### Linus Tester

[App page](https://appshunter.io/ios/app/linus-tester/id1523340677)

This platform collects extensive digital measurements related to brain health, including voice, speech, gait, cognition, and eye movement. It uses machine learning to analyze this data alongside electronic health records, creating precise metrics for evaluating interventions and personalizing brain health recommendations.

**Highlights:** Digital measurement collection, Voice and speech analysis, Gait and cognition tracking, Eye movement monitoring, Machine learning data analysis, Electronic health record integration

**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 Linus Tester free?

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

### Is MEMORY Karman Line free?

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

### Do Linus Tester or MEMORY Karman Line have ads?

Neither Linus Tester nor MEMORY Karman Line shows ads.

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

Linus Tester ships an update every 2 months, and MEMORY Karman Line every 26 months. Most recently, Linus Tester was updated on October 12, 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.*