Comparison

Viz.ai vs NIH Stroke Scale Calculator

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

Head to head
About

Viz.ai

This AI-powered telehealth platform assists clinicians in detecting critical diseases like stroke through advanced imaging analysis. It automates workflows and provides mobile imaging with HIPAA-compliant messaging to synchronize care across specialties.

Highlights
  • AI-powered disease detection
  • Automated CT perfusion imaging
  • Mobile imaging capabilities
  • HIPAA-compliant messaging
  • Synchronized clinical workflows
  • Remote installation
Features
Read full description

A Telehealth Platform from the World’s Leading AI Healthcare Company. Viz.ai, which uses artificial intelligence to detect diseases like large vessel occlusions and intracerebral hemorrhages, advanced imaging to automate CT perfusion. Viz.ai also provides mobile imaging and HIPAA-compliant messaging to help synchronize workflow across multiple specialties for diseases like stroke. Fast and easy to install remotely, our plug-and-play solution is designed to help clinical teams during these challenging times. Viz LVO, Viz CTP and Viz ICH are regulated as a medical device and intended for use by trained clinicians. Indications for use are available here: https://www.viz.ai/indications-for-use/

About

NIH Stroke Scale Calculator

This tool helps healthcare professionals quickly assess a patient's neurologic condition for stroke-like symptoms. Its user-friendly interface streamlines the diagnosis process, saving critical time during emergencies.

Highlights
  • Quick neurologic assessment
  • Stroke symptom evaluation
  • Intuitive user interface
  • Faster diagnosis
  • Severity determination
Features
Read full description

The NIH Stroke Scale Calculator is a lightweight tool for quickly assessing the neurologic condition of a patient with stroke-like symptoms to determine the presence and severity of any neurologic deficit resulting from an ischemic stroke. The intuitive, responsive UI results in a much faster diagnosis than the standard pen and paper approach to the NIH Stroke Scale thus saving precious time during a potentially life-threatening or debilitating stroke encounter.

Screenshots

Viz.ai4 screens
NIH Stroke Scale Calculator4 screens

Verdict

The call

The clearest difference is rating: NIH Stroke Scale Calculator at 5.0 against Viz.ai's 4.2. NIH Stroke Scale Calculator also leads on iOS requirement (15.4 vs 17.0). Viz.ai's advantage is update cadence (fortnightly vs every 4 months) and ratings volume (36 vs 4). On price, ads, in-app purchases and monetization model 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.

ReceptionRating · Positive reviews · Number of ratings

NIH Stroke Scale Calculator holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Viz.ai has 36 ratings behind it against 4, so its average is the more settled of the two.

UpkeepUpdate frequency

Viz.ai ships an update fortnightly, NIH Stroke Scale Calculator every 4 months. The most recent releases landed on September 16, 2026 and September 20, 2026 respectively.

Scorecard4 real differences · 6 level
Viz.ai versus NIH Stroke Scale Calculator: the parameters behind the verdict, then further details
ParameterViz.aiNIH Stroke Scale Calculator
PriceFreeFree
Rating4.2 (36 ratings)5.0 (4 ratings) — better
Positive reviews14.3% of reviews—
Number of ratings36 — better4
Update frequencyFortnightly — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.4 — better
Further details — not scored
Size56 MB2 MB
Age rating12+17+
DeveloperViz.ai, Inc.US Department of Veterans Affairs (VA)

Customer experience

Viz.ai

All ratings36 ratings
Positive77.8%
Neutral2.8%
Negative19.4%
Written reviews7 reviews
Positive14.3%
Neutral0.0%
Negative85.7%

NIH Stroke Scale Calculator

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Viz.ai

No in-app purchases

None

NIH Stroke Scale Calculator

No in-app purchases

Questions

Is Viz.ai free?
Viz.ai is free to download, with no in-app purchases.
Is NIH Stroke Scale Calculator free?
NIH Stroke Scale Calculator is free to download, with no in-app purchases.
Which has better reviews, Viz.ai or NIH Stroke Scale Calculator?
NIH Stroke Scale Calculator is rated higher. Viz.ai averages 4.2 out of 5 from 36 ratings, while NIH Stroke Scale Calculator averages 5.0 from 4 ratings.
Do Viz.ai or NIH Stroke Scale Calculator have ads?
Neither Viz.ai nor NIH Stroke Scale Calculator shows ads.
Which is updated more often, Viz.ai or NIH Stroke Scale Calculator?
Viz.ai ships an update fortnightly, and NIH Stroke Scale Calculator every 4 months. Most recently, Viz.ai was updated on September 16, 2026 and NIH Stroke Scale Calculator on September 20, 2026.

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