---
title: "cfDNA PPV Calculator - Reviews, Revenue and Downloads in Canada | Apple App Store"
description: "This Cell Free Fetal DNA PPV Calculator estimates positive predictive value (PPV) and negative predictive value (NPV) for prenatal cell-free DNA (cfDNA) screening using Bayesian probability.  Conditio"
---

# cfDNA PPV Calculator — Canada

![cfDNA PPV Calculator App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/f0/44/1d/f0441d6b-2ae7-0fbd-5033-4d1e2f3da2e2/AppIcon-0-0-1x_U007epad-0-1-85-220.jpeg/434x0w.png)

**Developer:** [David Deschamps](https://apptail.io/developer/david-deschamps-LsVab)
**Category:** Medical
**Rating:** N/A (0 ratings)
**Price:** Free
**Bundle ID:** com.daviddeschamps.ppvcalculator
**Store:** Apple App Store
**Country:** Canada
**Version:** 1.0 (released 2026-02-17)
**Original Release:** 2026-02-17
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/ca/app/app/id6759178792)
**AppTail Page:** [https://apptail.io/app/cfdna-ppv-calculator-jpzy/canada](https://apptail.io/app/cfdna-ppv-calculator-jpzy/canada)

## cfDNA PPV Calculator Description
This Cell Free Fetal DNA PPV Calculator estimates positive predictive value (PPV) and negative predictive value (NPV) for prenatal cell-free DNA (cfDNA) screening using Bayesian probability.

Conditions supported:
• Trisomy 21
• Trisomy 18
• Trisomy 13
• Monosomy X (45,X)
• 47,XXY
• 47,XYY
• 47,XXX

For autosomal trisomies, pretest probability may be derived from maternal-age population risk tables (midtrimester risk by age at term). For sex chromosome aneuploidies, pretest probability can be entered as population prevalence (1 in N). Sensitivity and specificity are user-editable to reflect lab-specific performance.

This app is for screening support and educational use. It does not provide a diagnosis. Positive screening results should be confirmed with diagnostic testing and clinical correlation.

## cfDNA PPV Calculator Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/15/9a/b0/159ab01e-9667-1e1d-85fa-63e3c5883b15/Simulator_Screenshot_-_iPhone_16_Pro_Max_-_2026-02-13_at_15.00.49.png/1320x2868.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/5d/a0/13/5da0132a-25dc-bd47-d3b7-44b3a8f84094/Simulator_Screenshot_-_iPhone_16_Pro_Max_-_2026-02-13_at_15.00.44.png/1320x2868.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/0f/32/17/0f32177c-6bea-7071-c569-bbcd481f20ed/Simulator_Screenshot_-_iPhone_16_Pro_Max_-_2026-02-13_at_15.00.27.png/1320x2868.png)







## cfDNA PPV Calculator Available In
- [Canada](https://apptail.io/app/cfdna-ppv-calculator-jpzy/canada)
- [Latvia](https://apptail.io/app/cfdna-ppv-calculator-jpzy/latvia)
- [Romania](https://apptail.io/app/cfdna-ppv-calculator-jpzy/romania)

---

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