# Growth Curve Notebook — Height, Weight & Percentiles

> Height, Weight & Percentiles (iPhone/iPad app by MASAKI CHIBA.)

- Source: https://appshunter.io/ios/app/growth-curve-notebook/id6787705254 (this page in markdown: same URL + `.md`)
- Developer: [MASAKI CHIBA](https://appshunter.io/developer/1890488277)
- Category: Health & Fitness, Medical
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 32 MB
- Languages: American English, Japanese
- Released: 2026-07-08
- Data updated: 2026-09-23
- User reviews in markdown: https://appshunter.io/ios/app/growth-curve-notebook/id6787705254/reviews.md

## What is Growth Curve Notebook?

Is my child growing on track?
Log the numbers from a checkup or school measurement, and see the answer on a chart.

Enter height and weight, and they're plotted against an official growth standard (WHO 0-23 months, CDC 2-20 years) as a smooth curve. See at a glance where your child falls within the standard -2SD to +2SD band.

■ Who this is for
・You want to log a measurement the moment you get it from a checkup or school
・You want to check regularly whether your child is tracking along the growth curve
・You've built up years of growth records and don't want to risk losing them
・You don't want your child's data stored on someone else's server

■ What's free
・Log height and weight (1 child, unlimited records)
・Growth curve chart based on the WHO/CDC international standard (height & weight)
・Automatic SD score and approximate percentile
・Record list, notes, and later edits
・Automatic backups plus file export/import (for switching devices)

■ Built to never lose your data
Growth records are something you build up over years — they should never be at risk. This app protects them with three layers of defense:
・Every save is verified before it replaces the previous file (a power loss mid-write can't corrupt your data)
・Multiple daily snapshots are kept automatically
・If the data file is ever unreadable, it's automatically restored from a backup

■ What Premium unlocks (one-time purchase)
・Add siblings (a second child and beyond)
・Export records as a CSV with SD scores (handy to bring to a checkup or print)
・An estimated target height calculated from both parents' height (reference only)
No subscription. Pay once, use it forever.

■ Privacy
Everything you enter (your child's name, birthday, height, weight, etc.) is stored only on your device and never sent to any external server. No account registration required.

■ About the growth standard
This app's growth curve and SD scores use the World Health Organization (WHO) Child Growth Standards for ages 0-23 months, connected with the CDC Growth Charts (2000) for ages 2-20 years. Because the two are based on separate research populations, there may be a slight step where they connect (24 months) — we show this as-is rather than smoothing it out.

■ Please note
The figures shown are a recording and calculation aid, not a medical diagnosis or advice. If you have concerns about your child's growth, please consult a medical professional or checkup.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 成長曲線プレミアム | $5.99 | one-time |



## Version history (last 5 releases)

### 1.0.6 — 2026-09-18

Minor improvements to the experience after adding a record. Thank you for using the app.

### 1.0.5 — 2026-09-10

Fixed an issue where the app name on the home screen stayed in Japanese even when the device language was set to English.

### 1.0.4 — 2026-09-09

Growth Curve Notebook is now available in English, with an international growth standard (WHO 0-23 months, CDC 2-20 years) and imperial units (ft/in, lb/oz).

Log your child's height and weight and see them plotted against the standard growth curve. Built with a triple-backup design so years of records are never lost — fully offline, no account required.

Feedback and requests are always welcome via the in-app rating prompt or an App Store review.

### 1.0.3 — 2026-09-04

初めてご利用の方向けに、アプリの使い方を説明する画面を追加しました。

### 1.0.2 — 2026-08-18

アプリの評価をお願いする画面を、App Store標準のものに変更しました。数タップで評価できるようになっています。

## More apps by MASAKI CHIBA

- [Speed Math Drill - Mental Math](https://appshunter.io/ios/app/speed-math-drill-mental-math/id6761619388)
- [Speed Vocab - Flashcard Word](https://appshunter.io/ios/app/speed-vocab-flashcard-word/id6764725300)
- [Sonic Math - Mental Math Drill](https://appshunter.io/ios/app/sonic-math-mental-math-drill/id6765611618)
- [血圧手帳AI - 親・シニアの血圧記録と家族見守り](https://appshunter.io/ios/app/ai/id6770567499)
- [Darts Scorer - Checkout & x01](https://appshunter.io/ios/app/darts-scorer-checkout-and-x01/id6776256594)
- [麻雀点数ノート - 符計算・計算機・初心者向け](https://appshunter.io/ios/app/id6776482540)

All apps by MASAKI CHIBA: https://appshunter.io/developer/1890488277

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*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 2026-09-23.*