Radiology vs OB ToolBox
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Radiology
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Diagnostic Radiology - Imaging of Aortic Disease โ โ Go beyond paper and do Radiology โ โ โธ This beautifully illustrated, interactive app offers authoritative guidance about indications for imaging, image interpretation and treatment options for aortic disease. It is of interest to cardiologists, radiologists, cardiothoracic and vascular surgeons and other specialists interested in the practical aspects of acquiring and interpreting imaging studies of the aorta. โธ Many interactive examples of common and less frequently encountered aortic pathologies. โธ Includes treatment options and possible complications, when appropriate, comprehensive tables are available. โธ Also contains an in-depth chapter about imaging before and after TAVI placement โธ The app has a dynamic searchable index that takes you directly to the interactive topic of interest See also the review in Radiology 269(2):338-9
OB ToolBox
This app offers a quick reference for essential medical values related to fetal growth, amniotic fluid, and Doppler indices. It includes calculators for preterm birth prediction, cesarean risk, and risk of stillbirth or miscarriage.
- Fetal growth reference values
- Estimated fetal weight calculator
- Amniotic fluid and Doppler indices
- Bishop score reference
- Preterm birth predictor
- Cesarean risk calculator
- Stillbirth and miscarriage risk calculators
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OB ToolBox provides a useful and quick reference values for fetal growth, estimated fetal weight, amniotic fluid and doppler indices, Bishop scores, preterm birth predictor, cesarean risk calculator, stillbirth calculator, miscarriage risk calculator, and more.
Screenshots
Verdict
The clearest difference is price: OB ToolBox at Free against Radiology's $19.99. OB ToolBox also leads on update cadence (every 3 weeks vs every 7 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
OB ToolBox is free to download; Radiology costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Radiology ships an update every 7 months, OB ToolBox every 3 weeks. The most recent releases landed on August 26, 2026 and July 20, 2026 respectively.
| Parameter | Radiology | OB ToolBox |
|---|---|---|
| Price | $19.99 | Free โ better |
| Update frequency | Every 7 months | Every 3 weeks โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | โ | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 โ better | 13.0 |
| Further details โ not scored | ||
| Size | 451 MB | 56 MB |
| Age rating | 4+ | 12+ |
| Developer | BestApps BV | Frederick Blair |
In-app purchases
Radiology
No in-app purchases
OB ToolBox
No in-app purchases









