NefroCalc vs Ped(z)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NefroCalc
This medical app provides quick calculations for glomerular filtration rate (GFR) using multiple established formulas. It supports CKD-EPI, MDRD, Cockcroft-Gault, and the Schwartz formula for pediatric use.
- GFR calculation
- CKD-EPI formula
- MDRD formula
- Cockcroft-Gault formula
- Schwartz formula for children
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NefroCalc is a renal calculator for quickly getting the glomerular filtration rate (GFR) by one of the following methods: - GFR by CKD EPI - GFR by MDRD - Cockcroft-Gault - Schwartz formula for children More information on NefroCalc´s Web page
Ped(z)
This medical app provides pediatricians with a comprehensive set of calculators for body percentiles, blood pressure, echocardiography, and more. It supports various calculation methods and guidelines, aiding in accurate patient assessments. Developed by a pediatrician, it serves as a control tool for medical professionals.
- Body percentiles (height, weight, BMI)
- Blood pressure percentiles
- Pediatric and fetal echocardiography Z-scores
- Spirometry normal values
- Gestational age calculation
- QTc calculator
- Hyperbilirubinemia thresholds
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Helpful pediatric app for pediatricians, developed by a pediatrician. Helps with: • Body percentiles: Calculation of several somatic percentiles (height, weight, head circumference, BMI etc.) according to: - Kromeyer-Hauschild et al. 2001 - Hesse et al. 2016/2017 - Braegger C et al. 2011 (Züricher Longitudinalstudie) - KiGGS study RKI 2013 - WHO Growth Charts - CDC Growth Charts 2000 - Zemel et al 2015 (Mb Down) • Blood Pressure percentiles: Normal values for blood pressure according to: - KiGGS study RKI 2013 - AHA 4. Task Force Report 2005 • Pediatric Echocardiography: Z-Scores for pediatric echocardiography according to: - Gautier et al. 2010 - Kampmann et al. 2000 - Zilberman et al. 2005 - Peterssen et al. 2008 - Dallaire et al. 2011 - Dallaire et al. 2016 - Koestenberger et. al 2009, 2012, 2012, 2014 • Fetal echocardiography: Z-Scores for fetal echocardiography according to: - Lee 2010 • Birth percentiles: Calculation for term and preterm newborns according to: - Voigt et al. 2006 - Fenton TR, Kim JH. A systematic review and meta-analysis to revise the Fenton growth chart for preterm infants. BMC Pediatr. 2013; 13:59 biomedcentral.com/1471-2431/13/59 • Spirometry normal values: Spirometric z-scores and normal values according to: - Quanjer, P.H. et al. 2012 • Kidney percentiles: Z-Scores for ultrasound according to: - Deeg/Weitzel et al. 1997 - Weizel 2012 • Syringe pump: Calculates Dosage or other parameters • Gestational age: No more counting days/weeks in calendars • QTc calculator: Corrected QT interval, QTc, either by RR-Interval or heart rate • Body surface area: BSA according to Mosteller or DuBois • ECG normal values: For Children and adults according to Park MK and Guntheroth WG 2006 • Target height: Estimated target height calculated by their parent's height according to Hermanussen et al 2003 • Hyperbilirubinemia: Thresholds for phototherapy and exchange transfusion according to the german AWMF guideline 024 - 007 DISCLAIMER: No warranty. Use it only as control to your own calculations. Please seek a doctor’s advice in addition to using this app and before making any medical decisions
Screenshots
Verdict
The clearest difference is rating: NefroCalc at 5.0 against Ped(z)'s 4.0. NefroCalc also leads on review sentiment (100% vs 85%) and iOS requirement (8.0 vs 11.0). Ped(z)'s advantage is update cadence (every 6 weeks vs every 8 months) and ratings volume (3 vs 1). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
NefroCalc holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 100% of NefroCalc's written reviews are positive against 85% of Ped(z)'s.
NefroCalc ships an update every 8 months, Ped(z) every 6 weeks. Both last shipped on November 6, 2026.
| Parameter | NefroCalc | Ped(z) |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.0 (3 ratings) |
| Positive reviews | 100.0% of reviews — better | 85.0% of reviews |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 8 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 7 MB | 17 MB |
| Age rating | 4+ | 17+ |
| Developer | Oscar Sosa | Daniel Gräfe |
Customer experience
NefroCalc
Ped(z)
In-app purchases
NefroCalc
No in-app purchases
Ped(z)
No in-app purchases
