Comparison

Linus Tester vs outSMARTPD

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Digital measurement collection
  • Voice and speech analysis
  • Gait and cognition tracking
  • Eye movement monitoring
  • Machine learning data analysis
  • Electronic health record integration
Features
Read full description

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.

About

outSMARTPD

Features
Read full description

outSMARTPD is an app built to assess your symptoms and determine if they are Parkinsonian. To use the app, follow the instructions to complete the non-motor surveys and then take a few quick motor tests. Immediately, the app will return your percent likelihood of having Parkinson's Disease. NOTE: This app does not diagnose Parkinson's Disease. This app does not give out medical information or recommendations. Please consult a doctor for any and all abnormal symptoms. This app is simply a tool to help users understand their symptoms from the comfort of their own home; please visit a doctor for any medical guidance.

Screenshots

Linus Tester3 screens
outSMARTPD4 screens

Verdict

The call

The clearest difference is update cadence: outSMARTPD at every 2 weeks against Linus Tester's every 2 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Linus Tester ships an update every 2 months, outSMARTPD every 2 weeks. The most recent releases landed on June 7, 2026 and September 18, 2026 respectively.

Scorecard1 real difference · 8 level
Linus Tester versus outSMARTPD: the parameters behind the verdict, then further details
ParameterLinus TesteroutSMARTPD
PriceFreeFree
Rating3.0 (4 ratings) — better—
Number of ratings4 — better—
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size202 MB32 MB
Age rating4+12+
DeveloperLinus Health, Inc.outSMARTPD LLC

In-app purchases

None

Linus Tester

No in-app purchases

None

outSMARTPD

No in-app purchases

Questions

Is Linus Tester free?
Linus Tester is free to download, with no in-app purchases.
Is outSMARTPD free?
outSMARTPD is free to download, with no in-app purchases.
Do Linus Tester or outSMARTPD have ads?
Neither Linus Tester nor outSMARTPD shows ads.
Which is updated more often, Linus Tester or outSMARTPD?
Linus Tester ships an update every 2 months, and outSMARTPD every 2 weeks. Most recently, Linus Tester was updated on June 7, 2026 and outSMARTPD on September 18, 2026.

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