# Seedling: Baby Growth Tracker — Private WHO+CDC growth charts > Private baby growth tracker using WHO/CDC standards with PDF export. (iPhone/iPad app by Rodrigo Carvajal.) - Source: https://appshunter.io/ios/app/seedling-baby-growth-tracker/id6762526499 (this page in markdown: same URL + `.md`) - Developer: [Rodrigo Carvajal](https://appshunter.io/developer/1890600406) - Category: Health & Fitness, Medical - Price: $2.99 - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 1 MB - Languages: American English - Released: 2026-04-21 - Data updated: 2026-08-20 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/seedling-baby-growth-tracker/id6762526499/reviews.md ## What is Seedling? Seedling tracks your baby's height, weight, head circumference, and weight-for-length using WHO Child Growth Standards and CDC growth charts. Paid once. No subscription, no ads, no account, no data collection. Records live in your own iCloud. Built for ages 0 through 5. Corrected age for preemies. Growth velocity trends. A growth trajectory estimator. Pediatrician-ready PDF export you can email to the office before a visit. I built this because every baby growth tracker I tried wanted a subscription or an email address or both, and most still hid the percentile math behind a paywall. What you get: Four growth charts: weight-for-age, height-for-age (length for the youngest), weight-for-length, and head-circumference-for-age. Clean rendering with Swift Charts, similar in feel to Apple Health. Covers the first five years, with a one-tap switch between "based on age" (the band your child is in now) and "all" (the full zero-to-five span). WHO Child Growth Standards and CDC growth charts. Sex-specific. Computed with the LMS method, sourced directly from who.int and cdc.gov, cited inline in the source. Switch between WHO and CDC as the default reference body, set separately for each child. Exact percentile for every measurement. Optional red/green arrow showing the change from the prior reading. Opt in to two-decimal precision in charts, tables, CSV, and PDF if you want clinical detail. Growth velocity in cm per month and grams per month. The metric pediatricians actually use after the first month, not just a static percentile. Growth Trajectory Estimator. Pick a child, pick a dimension (weight, height, or head circumference), and set a target value or a target date. Seedling projects when your child would reach that value, or what value they would be at on that date, based on the band they currently track. Plain-English explainer included. Not a medical prediction. Preemie support. Enter a gestational age under 37 weeks and corrected age shows automatically for the first two years. Multi-child profiles, each with their own measurement history and chart settings. Pediatrician-ready PDF export. One clean document with all four charts, ready to email or print before the visit. CSV import and export. Bring records from another app or a pediatrician's spreadsheet. Take your data out whenever you want. Nothing is locked in. Light, dark, and system themes. Metric or US units. Pick the percentile-line set you prefer (simplified or clinical). Works fully offline. Every percentile is computed on device. Privacy: No analytics SDK. No third-party trackers. No advertising identifiers. The app makes no network calls of any kind. Records live in your own iCloud Documents container. Apple syncs them across your devices, and the developer never sees them. If you prefer, the app falls back to local-only storage. No account, no sign-in, no email required. Ever. Why $2.99, paid once: We surveyed the top 13 baby growth trackers on the US App Store. Zero are paid up front. Every one is free-with-IAP or free-with-subscription. The category's subscription tiers run high: Huckleberry up to $119.99 a year, Sprout $59.99 to $89.99 a year, Glow Baby $48 a year, Baby Daybook lifetime $99.99. Seedling is $2.99 once. No Pro tier, no feature gates, no upgrade prompts. Every feature listed above is included. Built for iOS 17 and later. SwiftUI throughout. Written by one developer who reads pediatric papers as a hobby, not a venture-backed team chasing ARR targets at your child's expense. If something is missing that you need, email rodrigocf_92@icloud.com. The roadmap is set by parents and pediatricians, not a growth funnel. ## Key features - WHO and CDC growth charts - Percentile tracking - Growth velocity trends - Growth trajectory estimator - Pediatrician-ready PDF export - Multi-child profiles - Offline functionality ## Chart rankings - #193 in Top Paid · Health & Fitness (US App Store) ## Frequently asked questions about Seedling ### What is Seedling? Seedling is a baby growth tracker that uses WHO and CDC growth charts to monitor a child's height, weight, and head circumference. It provides detailed percentile tracking, growth velocity, and trajectory estimations, with data export options for pediatricians. ### How accurate is Seedling's growth tracking? Seedling uses the LMS method sourced directly from WHO and CDC data for accurate percentile calculations. It allows for two-decimal precision in charts, tables, and exports for clinical detail. ### Does Seedling have ads? No, Seedling is completely ad-free. It was built with a focus on privacy and does not contain any advertisements. ### What devices does Seedling support? Seedling is available for iPhone and iPad devices. ### How often is Seedling updated? The latest version of Seedling is 1.5, and it was last updated on June 3, 2026. Updates typically focus on refining features and ensuring compatibility. ### Can I use Seedling offline? Yes, Seedling works fully offline. All percentile calculations are performed on your device, ensuring your data remains private and accessible without an internet connection. ### What is the price of Seedling? Seedling is a one-time purchase of $2.99. There are no subscriptions or hidden fees, and all features are available upon purchase. ### How does Seedling handle preemie babies? Seedling supports preemie babies by allowing you to enter a gestational age under 37 weeks. The app will automatically display the corrected age for the first two years, ensuring accurate growth tracking. ## Version history (last 5 releases) ### 1.7 — 2026-08-08 • Chart settings are now per child. WHO or CDC baseline, chart range, percentile lines, the % change arrow, and decimal percentiles can each be set separately for every kid in Settings. Your current choices carry over automatically. • Measurements taken on back-to-back days now plot as separate points instead of stacking on one spot. • Two measurements on the same day now show as two distinct, tappable dots. • For newborns, charts label the first weeks in days (2d, 4d, 6d) instead of a flat "0m". ### 1.5 — 2026-06-03 • Head circumference is now a tracked measurement. Fourth chart on each kid's detail screen, with percentile, growth velocity, time-range filters, an exact-value table, and biologically-implausible-value warnings. • Cm/inches toggle for head circumference in Settings. • Head circumference values round-trip through CSV import and export. • Head circumference appears on the pediatrician PDF report. • The Growth Trajectory Estimator now projects head circumference, alongside weight and height. • Weight is the top chart on each kid's detail screen now, with length/height second, weight-for-length third, and head circumference fourth. The measurement input form follows the same order. • Weight-for-length percentile curves no longer crisscross under the CDC reference body on the "All" view. Cleaner under both WHO and CDC now. • Custom date ranges on the growth charts render correctly for every window, including ranges before the current age band, or ranges that cross the two-year mark. • Under the CDC baseline, the head-circumference chart uses CDC data through 36 months and WHO data above that. A short on-chart note explains the source. ### 1.4 — 2026-05-26 • New custom date range for the growth charts — tap the new "Range" option on a chart's time toggle, then pick a start and end date to narrow the chart to exactly that window. Great for zooming in on a specific stretch: a growth spurt, the weeks around a checkup, or time on a new feeding plan. Each chart keeps its own range, and the 1W / 1M / All options are unchanged. ### 1.3 — 2026-05-19 • New Growth Trajectory Estimator — pick a kid + a target weight or height and see when they'd reach it based on their current growth curve. Or flip it: pick a future date and see what value they'd be at. Reachable from a new entry at the bottom of the kids list. • New in-app links to plain-English explainer pages: how the trajectory estimator's projection works (below the disclaimer on the estimator screen), and how the CSV import/export format is laid out (in Settings). ### 1.2 — 2026-05-15 • Kid ages now display as years and months once your child is 1 year or older — for example a 2.5-year-old reads "2y 6m" instead of "30m 15d". Quicker to read at a glance. • New "Use decimal percentiles" setting renders percentiles with two decimal places (73.84th vs 74th) in charts, tables, CSV, and PDF — opt-in from Settings. • Fixed: the growth-velocity label no longer shows an unrealistic per-day rate when you log two measurements on the same day. ## More apps by Rodrigo Carvajal - [Unit Forge Converter](https://appshunter.io/ios/app/unit-forge-converter/id6761640858) All apps by Rodrigo Carvajal: https://appshunter.io/developer/1890600406 --- *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 2026-08-20.*