Seedling: Baby Growth Tracker

Description

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 [email protected]. The roadmap is set by parents and pediatricians, not a growth funnel.