Bone Age vs GrowthMonitor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bone Age
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.
- Tanner-Whitehouse method calculation
- TWII and TWIII references
- RUS score calculation
- TW20 score calculation
- Carpal score calculation
- In-clinic use
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Calculate a bone age without using an atlas right there in clinic using the Tanner-Whitehouse method. Both TWII and TWIII references are included, to give 'RUS', 'TW20' and even carpal scores.
GrowthMonitor
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This app has been developed by NHS paediatric health professionals because growth is an important indicator of a child's health and well-being. GrowthMonitor will accurately measure height, check whether your child's growth is on a healthy track and let you know if your child's height or growth pattern is outside of the normal range.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Bone Age | GrowthMonitor |
|---|---|---|
| Price | $7.99 | Free — better |
| Rating | 2.3 (3 ratings) — better | — |
| Positive reviews | 25.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 13.5 |
| Further details — not scored | ||
| Size | 15 MB | 7 MB |
| Age rating | 17+ | 12+ |
| Developer | Simon Chapman | QApps |
In-app purchases
Bone Age
No in-app purchases
GrowthMonitor
No in-app purchases
