Comparison

Stethophone PRO vs NPV PPV Calc

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

Head to head
About

Stethophone PRO

This medical application transforms a smartphone into an FDA-cleared cardiac assessment tool. It uses AI-powered sound analysis to detect heart murmurs and other indicators of heart health, enabling early detection and improved patient routing.

Highlights
  • FDA-cleared cardiac assessment tool
  • AI-powered heart sound analysis
  • Detects murmurs and heart issues
  • No additional hardware required
  • Securely share findings
  • Integrates into telehealth workflows
Read full description

INSTANT ADVANCED CARDIAC SCREENING IS NOW DOWLOADABLE TO YOUR PHONE Stethophone® Pro turns a smartphone into a powerful, FDA-cleared, and clinically proven cardiac assessment tool – no extra hardware required. It delivers fast, accurate detection of structural and rhythmic heart issues, enabling upstream detection and strengthening detection infrastructure across care settings. Ideal for in-clinic, hospital, remote or population screening applications, while supporting more effective patient routing from first signal to follow-up care. HEAR MORE. KNOW MORE Stethophone Pro is the first FDA-cleared, class II medical application of its kind that captures chest sounds, augments listening and uses a new class of AI-powered sound analysis to detect murmurs, and other key indicators of heart health – quickly and with unparalleled accuracy. It helps structure acoustic data into clinically meaningful signals, supporting earlier insight and more consistent decision-making. NO HARDWARE. NO HASSLE 100% software: Just download and use Scalable: Easy to deploy in minutes, to practitioners and patients alike, forming a flexible layer of modern detection infrastructure Immediate value: No additional hardware, no maintenance or special training required ACTIONABLE INSIGHTS. REAL-TIME RESULTS Use a smartphone to detect murmurs, visualize cardiac timing, create timely records as symptoms occur, or during history and physical exams. Designed to support upstream detection and guide patient routing toward appropriate diagnostic pathways and follow-up care. AI-POWERED PRECISION Trusted by thousands of providers, Stethophone Pro amplifies, filters, and analyzes heart and lung sounds with precision – helping doctors and nurses work more efficiently, structure clinical data at scale, and improve downstream decision quality. COLLABORATE, SHARE, SCALE Record and securely share findings Enable early detection of valvular disease and arrythmias in every practice area Integrate into telehealth, population-health, and pre- and post-op workflows Support at-home and remote use under clinician supervision Contribute to a scalable detection infrastructure that improves patient routing and optimizes patient mix across healthcare systems THE FUTURE OF CARDIAC SCREENING IS HERE Valvular heart disease and related conditions are an epidemic, with millions of people remaining undiagnosed. Stethophone Pro is a cost-effective, scalable cardiac screening and early decision support solution designed to strengthen upstream detection, structure clinical data, and improve patient routing – ultimately contributing to a more appropriate patient mix and better utilization of advanced diagnostic resources. Stethophone Pro is a Class II FDA-cleared software medical device that has passed rigorous validation to both US and international standards to ensure world-class accuracy and medical informativeness. It is intended for use by healthcare practitioners or under the supervision/prescription of a licensed medical professional. AVAILABLE OPTIONS Sound recording, playback, storing and sharing functionality is free and available for everyone. Automated results processing and PDF reporting is available only for healthcare practitioners requiring verification of a professional medical license or for patients under prescription. Stethophone is offered to clinics, hospitals, and healthcare networks under commercial license. Disclaimer: https://bit.ly/4n1vBR7 Privacy Policy: https://bit.ly/4tIkEWX Terms & Conditions: https://bit.ly/4wjCpxR Regulatory Information: https://bit.ly/42GNBGZ

About

NPV PPV Calc

This app provides quick calculations for Negative Predictive Value, Positive Predictive Value, and Overall Accuracy for any medical test. It's designed for rapid analysis of diagnostic test performance.

Highlights
  • Calculate Negative Predictive Value
  • Calculate Positive Predictive Value
  • Calculate Overall Accuracy
  • Rapid test performance analysis
  • Designed for medical tests
Features
Read full description

Rapidly calculate Negative Predictive Value, Positive Predictive Value and Overall Accuracy for any test.

Screenshots

Stethophone PRO4 screens
NPV PPV Calc1 screens

Verdict

The call

The clearest difference is price: Stethophone PRO at Free against NPV PPV Calc's $0.99. Stethophone PRO also leads on ratings volume (4 vs 1). NPV PPV Calc's advantage is rating (5.0 vs 4.0) and iOS requirement (16.6 vs 18.0). On 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

Stethophone PRO is free to download; NPV PPV Calc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

NPV PPV Calc holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Scorecard5 real differences · 4 level
Stethophone PRO versus NPV PPV Calc: the parameters behind the verdict, then further details
ParameterStethophone PRONPV PPV Calc
PriceFree — better$0.99
Rating4.0 (4 ratings)5.0 (1 ratings) — better
Number of ratings4 — better1
Update frequencyEvery 4 months—
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhoneiPhone
Requires iOS18.016.6 — better
Further details — not scored
Size80 MB0 MB
Age rating17+4+
DeveloperSparrow Acoustics Inc.Connor Landgraf

Customer experience

Stethophone PRO

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

NPV PPV Calc

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Stethophone PRO

No in-app purchases

None

NPV PPV Calc

No in-app purchases

Questions

Is Stethophone PRO free?
Stethophone PRO is free to download, with no in-app purchases.
Is NPV PPV Calc free?
NPV PPV Calc costs $0.99, with no in-app purchases.
Which has better reviews, Stethophone PRO or NPV PPV Calc?
NPV PPV Calc is rated higher. Stethophone PRO averages 4.0 out of 5 from 4 ratings, while NPV PPV Calc averages 5.0 from 1 ratings.
Do Stethophone PRO or NPV PPV Calc have ads?
Neither Stethophone PRO nor NPV PPV Calc shows ads.

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