# GrowthPlot vs Z Scores

The clearest difference is in-app purchases: GrowthPlot at none against Z Scores's 3. GrowthPlot also leads on update cadence (every 6 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Z Scores sells 3 in-app purchases, starting at $1.99 per month. GrowthPlot asks for nothing beyond the download.

GrowthPlot ships an update every 6 days, Z Scores every 3 weeks. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | GrowthPlot | Z Scores |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/z-scores-pediametrics/id6756817829/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 85 MB | 124 MB |
| Requires iOS | **16.4** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | +17 |
| Developer | [BC Children's Hospital](https://appshunter.io/developer/1521364756) | [Edwar Martinez](https://appshunter.io/developer/1833941697) |

## What reviewers say

### GrowthPlot

[App page](https://appshunter.io/ios/app/growthplot/id6469408252)

**Features:** macOS Compatibility

**In-app purchases:** none


### Z Scores

[App page](https://appshunter.io/ios/app/z-scores-pediametrics/id6756817829)

This app provides clinical-grade pediatric growth assessments using WHO standards. It calculates key metrics like weight-for-age and BMI, offering Z-scores, validation checks, and visual growth charts. Advanced features include BSA calculations, fluid requirements, and patient management with PDF report generation.

**Highlights:** WHO-based growth calculations, Weight-for-Age, Height-for-Age, BMI-for-Age, Z-scores and growth classification, Visual growth charts, Body Surface Area (BSA) calculator, Holliday-Segar fluid requirements, Patient measurement history, Professional PDF report generation

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PediMetrics | $1.99 | per month |
| PediaMetrics | $4.99 | per year |
| Lifetime Access | $9.99 | one-time |


## Frequently asked questions

### Is GrowthPlot free?

GrowthPlot is free to download, with no in-app purchases.

### Is Z Scores free?

Z Scores is free to download, with in-app purchases available.

### Do GrowthPlot or Z Scores have ads?

Neither GrowthPlot nor Z Scores shows ads.

### Which is updated more often, GrowthPlot or Z Scores?

GrowthPlot ships an update every 6 days, and Z Scores every 3 weeks. Most recently, GrowthPlot was updated on November 4, 2026 and Z Scores on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*