# Stethophone PRO vs NPV PPV Calc

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.

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.

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.

## The numbers

| Metric | Stethophone PRO | NPV PPV Calc |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/stethophone-pro/id6739212032/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/npv-ppv-calc/id6740935373/reviews)** |
| Number of ratings | **4** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Monetization | **Free** | Paid |
| Size | 80 MB | 0 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Sparrow Acoustics Inc.](https://appshunter.io/developer/1569458168) | [Connor Landgraf](https://appshunter.io/developer/1791684726) |

## What reviewers say

### Stethophone PRO

[App page](https://appshunter.io/ios/app/stethophone-pro/id6739212032)

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

**In-app purchases:** none


### NPV PPV Calc

[App page](https://appshunter.io/ios/app/npv-ppv-calc/id6740935373)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*