Linus Tester vs MEMORY Karman Line
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Linus Tester
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.
- Digital measurement collection
- Voice and speech analysis
- Gait and cognition tracking
- Eye movement monitoring
- Machine learning data analysis
- Electronic health record integration
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The Linus platform allows the coordinated collection of large amounts of information about digital measurements—such as voice, speech, gait, cognition and eye movement—that may have a bearing on brain health and lead to the identification of digital biomarkers. Applying machine learning methods of data analysis to this rich set of measurements, together with information drawn from electronic health records, provides a composite picture with more precise metrics for evaluating the impact of potential interventions and lifestyle changes, and for offering personalized prescriptions to promote brain health.
MEMORY Karman Line
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Karman Line MEMORY helps you by making smart use of external and internal reminders. This app was developed in collaboration with Radboud University, Donders Institute for Brain, Cognition and Behavior and Klimmendaal Rehabilitation Specialists. MEMORY is CE certified as a medical device EU MDR 2017/45, UDI-DI code: 08720892379832 and is following the GSPR data restrictions.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Linus Tester | MEMORY Karman Line |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (4 ratings) — better | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 2 months — better | Every 26 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 202 MB | 104 MB |
| Age rating | 4+ | 17+ |
| Developer | Linus Health, Inc. | Yellow Riders |
In-app purchases
Linus Tester
No in-app purchases
MEMORY Karman Line
No in-app purchases
