RadSim vs Rad Index
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RadSim
Master radiologic technology with an interactive simulator and comprehensive positioning guide. Practice x-ray techniques and learn precise patient positioning for various anatomy regions. Designed for students and professionals to enhance clinical confidence and accuracy.
- X-ray simulator with adjustable settings
- Positioning dictionary for anatomy regions
- Clinical guides for CR placement and SID
- Practice ARRT exam preparation
- Interactive learning platform
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Master Radiologic Technology with RadSim. RadSim is an essential educational tool designed for radiologic technology students and professionals. Whether you are preparing for the ARRT exam or looking to refine your clinical skills, RadSim provides a comprehensive, interactive platform to practice and learn. Key Features: X-ray Simulator: Experiment with kVp, mAs, SID, and Grid settings to see real-time effects on image quality. Positioning Dictionary: Access a detailed library of anatomy regions including Chest, Abdomen, Upper/Lower Extremities, Spine, and more. Clinical Guides: Get precise instructions on Central Ray (CR) placement, SID requirements, and patient positioning for every view. Pro Features: Unlock advanced parameters and the complete anatomy database for professional-level study. Designed by technologists for technologists. Boost your clinical confidence and technical accuracy with RadSim today. (Note: This application is for educational purposes only and should not be used for medical diagnosis or treatment on real patients.)
Rad Index
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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 — all offline. Built by a practicing Radiographer (TSRM). Clinical content peer-reviewed twice. Available in Italian, English and Spanish. —————————————————————————————— RADIOGRAPHIC PROJECTIONS —————————————————————————————— 147 cards across 8 anatomical regions: • Chest — PA, lateral, obliques, trauma variants (cross-table, supine) • Skull — PA, lateral, Waters, Caldwell, Towne, skull base, mastoids, orbits, sinuses • Spine — cervical, thoracic, lumbar, sacrum, coccyx; trauma and stretcher variants • Upper limb — fingers, hand, wrist, forearm, elbow, humerus, shoulder, clavicle, sternum, scapula • Lower limb — toes, foot, calcaneus, ankle, tibia/fibula, knee, femur, hip, pelvis, patella • Abdomen — supine, erect, decubitus • Pelvis — AP, oblique projections • Long bone stitching — 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. —————————————————————————————— STUDY & REVIEW —————————————————————————————— • Flashcards with spaced repetition • 3 cards per projection: centering, DR parameters, patient position • Automatic daily sessions based on performance • Ideal for registry exams and clinical placement —————————————————————————————— STUDY TOOLS —————————————————————————————— • Interactive ALARA checklist (ICRP 147/2021) • Personal notes for each projection with auto-save • PDF export and share with zone-coloured header • Radiological glossary (All / Technical / Anatomy tabs) —————————————————————————————— DESIGN & USABILITY —————————————————————————————— • Full dark mode with dedicated zone colours • Adjustable text size: S / M / L / XL • Works completely offline • Available in Italian, English and Spanish • Quick search with filters (zone, level, notes) and history • Favourites and recents on home screen 14-day free trial — no card required. Then a one-time purchase of €9.99. No subscription, ever.
Screenshots
Verdict
The clearest difference is iOS requirement: RadSim at 13.0 against Rad Index's 15.0. On price, 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
Both are free to download. RadSim sells 1 one-off in-app purchase and Rad Index sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | RadSim | Rad Index |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | — | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 20 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Chaofan Duan | Simone Zen |
In-app purchases
RadSim
- Unlock Pro$9.99
Rad Index
- Rad Index Premium$8.99








