Ped(z) vs PediaTools
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
PediaTools
This medical app provides pediatric calculators for blood counts, fluid requirements, and nutrition. It also includes tools for GFR, hyponatremia correction, and IV drip rates, along with various pediatric scoring systems.
- Pediatric blood count values
- Hydrocaloric and electrolyte calculations
- Total Parenteral Nutrition calculations
- Glomerular filtration rate (GFR) computation
- Hyponatremia correction calculator
- IV drip rate calculator
- Pediatric scoring systems
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This application offers a comprehensive set of clinical tools for pediatric and neonatal care: » Reference values for complete blood count in pediatric patients of all ages. » Calculates daily fluid and electrolyte requirements. » Pediatric diabetic ketoacidosis (DKA) fluid management calculator » Age-based reference values for serum immunoglobulins, lymphocytes, and complement. » Reference values for laboratory tests such as TSH, FSH, LH, DHEA-S, T4, and other endocrinological parameters. » Calculates requirements for pediatric and neonatal parenteral nutrition. » Estimates the glomerular filtration rate and generates an age-based reference table. » Calculates the correction of hyponatremia and hypernatremia, as well as the free water deficit based on estimated total body water. » Allows calculation of medications used in common pediatric emergency conditions, such as croup, asthma, cardiorespiratory arrest, seizures, anaphylaxis, and hypoglycemia. » Calculates the intravenous infusion rate of drugs used in emergencies. » Includes pediatric and neonatal scales such as Silverman-Andersen, Apgar, Ballard, Pediatric Appendicitis Score, Alvarado, Westley, Pulmonary Score, Wood-Downes-Ferrés, among others. Please note that if you are not a healthcare professional, it is essential to consult a pediatrician before making any medical decision.
Screenshots
Verdict
The clearest difference is price: Ped(z) at Free against PediaTools's $3.99. Ped(z) also leads on iOS requirement (11.0 vs 15.0). PediaTools's advantage is rating (5.0 vs 4.0) and review sentiment (100% vs 85%). On ratings volume, update cadence, ads and in-app purchases 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
Ped(z) is free to download; PediaTools costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
PediaTools holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 3 and 6 respectively. Written reviews point the same way: 85% of Ped(z)'s written reviews are positive against 100% of PediaTools's.
Ped(z) ships an update every 6 weeks, PediaTools every 5 weeks. The most recent releases landed on October 26, 2026 and October 30, 2026 respectively.
| Parameter | Ped(z) | PediaTools |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 4.0 (3 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 85.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 | 6 — better |
| Update frequency | Every 6 weeks | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Best chart rank | — | #194 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 17 MB | 134 MB |
| Age rating | 17+ | 4+ |
| Developer | Daniel Gräfe | Gerson Rodriguez |
Customer experience
Ped(z)
PediaTools
In-app purchases
Ped(z)
No in-app purchases
PediaTools
No in-app purchases









