Comparison

Rad Index vs RadPosition

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Rad Index

Features
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Radiographic positioning reference app for Radiographers, Radiologic Technologists and Radiography students. 147 clinical projection cards with separate DR and CR technical parameters, calculators, spaced repetition flashcards and ALARA checklist โ€” all offline. Built by a practicing Radiographer (TSRM). Clinical content peer-reviewed twice. Available in Italian, English and Spanish. โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€” RADIOGRAPHIC PROJECTIONS โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€” 147 cards across 8 anatomical regions: โ€ข Chest โ€” PA, lateral, obliques, trauma variants (cross-table, supine) โ€ข Skull โ€” PA, lateral, Waters, Caldwell, Towne, skull base, mastoids, orbits, sinuses โ€ข Spine โ€” cervical, thoracic, lumbar, sacrum, coccyx; trauma and stretcher variants โ€ข Upper limb โ€” fingers, hand, wrist, forearm, elbow, humerus, shoulder, clavicle, sternum, scapula โ€ข Lower limb โ€” toes, foot, calcaneus, ankle, tibia/fibula, knee, femur, hip, pelvis, patella โ€ข Abdomen โ€” supine, erect, decubitus โ€ข Pelvis โ€” AP, oblique projections โ€ข Long bone stitching โ€” full spine, full limb Each card: patient positioning, centering point, separate DR and CR parameters, image quality criteria, common errors, practical clinical notes. Collapsible DR/CR/PSP guide with Deviation Index (DI) formula and grid frequency table. โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€” STUDY & REVIEW โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€” โ€ข Flashcards with spaced repetition โ€ข 3 cards per projection: centering, DR parameters, patient position โ€ข Automatic daily sessions based on performance โ€ข Ideal for registry exams and clinical placement โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€” STUDY TOOLS โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€” โ€ข Interactive ALARA checklist (ICRP 147/2021) โ€ข Personal notes for each projection with auto-save โ€ข PDF export and share with zone-coloured header โ€ข Radiological glossary (All / Technical / Anatomy tabs) โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€” DESIGN & USABILITY โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€”โ€” โ€ข Full dark mode with dedicated zone colours โ€ข Adjustable text size: S / M / L / XL โ€ข Works completely offline โ€ข Available in Italian, English and Spanish โ€ข Quick search with filters (zone, level, notes) and history โ€ข Favourites and recents on home screen 14-day free trial โ€” no card required. Then a one-time purchase of โ‚ฌ9.99. No subscription, ever.

About

RadPosition

Read full description

We have developed this mobile application to provide easier, more intuitive access to radiographic positioning techniques for clinical practitioners and students. Multilingual translation is available for some text. Please note that context may feel unnatural due to the use of Google Translate. (Korean, Chinese, Spanish, French, German, Greek, Hindi, Arabic, Indonesian, Portuguese, Russian, Vietnamese, Thai, Filipino). Please note that this app contains some ads to support ongoing maintenance and its continued availability on the App Store. We appreciate your understanding.

Screenshots

Rad Index4 screens
RadPosition4 screens

Verdict

The call

The clearest difference is in-app purchases: RadPosition at none against Rad Index's 1. Rad Index's advantage is ads (none vs shown). On price, update cadence, 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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Rad Index sells 1 one-off in-app purchase. RadPosition asks for nothing beyond the download.

UpkeepUpdate frequency

Rad Index ships an update fortnightly, RadPosition every 2 weeks. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

Scorecard2 real differences ยท 4 level
Rad Index versus RadPosition: the parameters behind the verdict, then further details
ParameterRad IndexRadPosition
PriceFreeFree
Update frequencyFortnightly โ€” betterEvery 2 weeks
AdsNo โ€” betterYes
In-app purchasesYesNo โ€” better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details โ€” not scored
Size39 MB29 MB
Age rating4+4+
DeveloperSimone ZenBYOUNG JUN HWANG

In-app purchases

1 purchases

Rad Index

One-time1
  • Rad Index Premium$8.99
None

RadPosition

No in-app purchases

Questions

Is Rad Index free?
Rad Index is free to download, with in-app purchases available.
Is RadPosition free?
RadPosition is free to download, with no in-app purchases.
Do Rad Index or RadPosition have ads?
RadPosition shows ads; Rad Index does not.
Which is updated more often, Rad Index or RadPosition?
Rad Index ships an update fortnightly, and RadPosition every 2 weeks. Most recently, Rad Index was updated on October 31, 2026 and RadPosition on November 5, 2026.

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