# Bone Age vs GrowthMonitor

The clearest difference is price: GrowthMonitor at Free against Bone Age's $7.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

GrowthMonitor is free to download; Bone Age costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Bone Age ships an update every 3 months, GrowthMonitor every 2 months. The most recent releases landed on October 23, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Bone Age | GrowthMonitor |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/bone-age/id665745944/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 15 MB | 7 MB |
| Requires iOS | **13.0** | 13.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Simon Chapman](https://appshunter.io/developer/629291277) | [QApps](https://appshunter.io/developer/394183069) |

## What reviewers say

### Bone Age

[App page](https://appshunter.io/ios/app/bone-age/id665745944)

This medical app calculates bone age using the Tanner-Whitehouse method, offering TWII and TWIII references for 'RUS', 'TW20', and carpal scores directly in a clinical setting.

**Highlights:** Tanner-Whitehouse method calculation, TWII and TWIII references, RUS score calculation, TW20 score calculation, Carpal score calculation, In-clinic use

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

**In-app purchases:** none


### GrowthMonitor

[App page](https://appshunter.io/ios/app/growthmonitor/id1585179673)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Bone Age free?

Bone Age costs $7.99, with no in-app purchases.

### Is GrowthMonitor free?

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

### Do Bone Age or GrowthMonitor have ads?

Neither Bone Age nor GrowthMonitor shows ads.

### Which is updated more often, Bone Age or GrowthMonitor?

Bone Age ships an update every 3 months, and GrowthMonitor every 2 months. Most recently, Bone Age was updated on October 23, 2026 and GrowthMonitor on October 19, 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.*