# PediTools: Fenton 2013 — Premature infant growth chart > Medical app for premature infant growth chart calculations using Fenton 2013 data. (iPhone/iPad app by Joseph Chou.) - Source: https://appshunter.io/ios/app/peditools-fenton-2013/id1457464960 (this page in markdown: same URL + `.md`) - Developer: [Joseph Chou](https://appshunter.io/developer/1457464959) - Category: Medical - Price: Free - Rating: 5.00/5 from 9 App Store ratings · 3 written reviews indexed - Age rating: 12+ - Requires: iOS 11.2 · 7 MB - Languages: English - Released: 2019-05-01 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/peditools-fenton-2013/id1457464960/reviews.md ## What is PediTools? Developed for pediatric clinical providers, this app uses the 2013 Fenton growth charts for premature infants between 22 4/7 and 50 0/7 weeks gestation to report percentiles and Z-scores for weight, length, and head circumference. The Fenton 2013 preterm growth charts are based on systematic review and meta-analysis of population-based, gender-specific preterm measurements at birth of weight, length, and head circumference references from developed countries. The chart was smoothed to avoid discontinuity between the preterm datasets and the World Health Organization (WHO) Growth Standard, to promote an improved transition between preterm and WHO growth charts. This implementation uses LMS parameters (skew, median, and standard deviation) to allow calculation of precise percentiles and Z-scores. Features: • gender-specific, from 22 4/7 to 50 0/7 weeks gestation • calculation of percentile and Z-scores for weight, length, and head circumference • alert for small (less than 10th percentile) or large (greater than 90th percentile) for gestation • displays growth needed to maintain current percentile • convenient buttons to display 10th, 50th, and 90th percentile measurements • slider selection to display measurement between 1st and 99th percentile ## Key features - 2013 Fenton growth charts for premature infants - Calculates percentiles and Z-scores - Supports weight, length, and head circumference - Gender-specific charts - Alerts for small or large for gestation - Displays growth needed to maintain percentile ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/peditools-fenton-2013/id1457464960/reviews.md ### 5/5 — Great app! *2019-11-12* This app is extremely helpful for daily rounds to quickly assess growth and nutritional adequacy. Super user-friendly and highly recommend to all nicu RDs and neonatologists. ### 5/5 — Love it! *2019-07-02* Thanks for adding the growth velocity this is particularly helpful for malnutrition assessment! Very easy to use and so glad it’s available! ### 3/5 — Good app, room for improvement *2019-05-07* Love that this is an app now, super convenient! Would recommend adding the expected weekly growth that’s also found on the website. Thanks for making this!!! **Developer response:** Thank you for the feedback! Expected weekly growth has been added to v1.1, now available. ## Frequently asked questions about PediTools ### What is PediTools: Fenton 2013 used for? PediTools: Fenton 2013 is a medical application designed for pediatric providers to calculate percentiles and Z-scores for premature infants using the 2013 Fenton growth charts. It helps in assessing weight, length, and head circumference relative to gestational age. ### What age range does PediTools: Fenton 2013 support? The app supports premature infants from 22 4/7 to 50 0/7 weeks gestation. This range is specifically designed to cover the critical growth period for preterm babies. ### Does PediTools: Fenton 2013 provide alerts for growth deviations? Yes, PediTools: Fenton 2013 includes alerts for infants who are small (less than 10th percentile) or large (greater than 90th percentile) for their gestation. This feature helps clinicians identify potential growth concerns early. ### What specific measurements does PediTools: Fenton 2013 track? The app tracks and calculates percentiles and Z-scores for weight, length, and head circumference. It also displays the growth needed for an infant to maintain their current percentile. ### Is PediTools: Fenton 2013 available on Android devices? Based on the provided data, PediTools: Fenton 2013 is supported on iPhone and iPod devices. Information regarding Android compatibility is not available. ### How often is PediTools: Fenton 2013 updated? The latest version of PediTools: Fenton 2013 was released on July 30, 2019. The initial release date was May 1, 2019. Further update frequency details are not provided. ### What is the user rating for PediTools: Fenton 2013? PediTools: Fenton 2013 has a high user rating of 5.0 stars based on 9 ratings. This indicates a very positive reception from its users. ### Does PediTools: Fenton 2013 have ads? No, PediTools: Fenton 2013 does not contain advertisements. The app is free to use and does not display any promotional content. ## Version history (last 3 releases) ### 1.1.1 — 2019-07-30 v1.1.1 • Fixed minor user interface glitches v1.1 • Added growth needed to maintain current percentile • UI layout changes • Fixed bug with boy head circumference when gestation ended with 6/7 or 0/7 days Please let us know what features you'd like in future versions! ### 1.1 — 2019-06-18 • Added growth needed to maintain current percentile • UI layout changes • Fixed bug with boy head circumference when gestation ended with 6/7 or 0/7 days Please let us know what features you'd like in future versions! ### 1.0 — 2019-05-01 No release notes. ## More apps by Joseph Chou - [PediTools: GA Calc](https://appshunter.io/ios/app/peditools-ga-calc/id1474552213) All apps by Joseph Chou: https://appshunter.io/developer/1457464959 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*