Flags Quiz vs Rad Index
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Flags Quiz
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Flags help us to identify different countries around the world. A country's flag is made up of symbols, colors and sometimes phrases that represent its identity or character. This Flags quiz includes 180 unique flags. You will need to guess each time 20 random flags. Don't stop until you make 100% correct in every try! This app is ideal to test your knowledge and train your memory! You can always use the bulb button (upper-right corner) to get little help if the flag is too hard for you to guess. Have fun!
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 โ all offline. Built by a practicing Radiographer (TSRM). Clinical content peer-reviewed twice. Available in Italian, English and Spanish. โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ RADIOGRAPHIC PROJECTIONS โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ 147 cards across 8 anatomical regions: โข Chest โ PA, lateral, obliques, trauma variants (cross-table, supine) โข Skull โ PA, lateral, Waters, Caldwell, Towne, skull base, mastoids, orbits, sinuses โข Spine โ cervical, thoracic, lumbar, sacrum, coccyx; trauma and stretcher variants โข Upper limb โ fingers, hand, wrist, forearm, elbow, humerus, shoulder, clavicle, sternum, scapula โข Lower limb โ toes, foot, calcaneus, ankle, tibia/fibula, knee, femur, hip, pelvis, patella โข Abdomen โ supine, erect, decubitus โข Pelvis โ AP, oblique projections โข 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. โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ STUDY & REVIEW โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ โข Flashcards with spaced repetition โข 3 cards per projection: centering, DR parameters, patient position โข Automatic daily sessions based on performance โข Ideal for registry exams and clinical placement โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ STUDY TOOLS โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ โข Interactive ALARA checklist (ICRP 147/2021) โข Personal notes for each projection with auto-save โข PDF export and share with zone-coloured header โข Radiological glossary (All / Technical / Anatomy tabs) โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ DESIGN & USABILITY โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ โข Full dark mode with dedicated zone colours โข Adjustable text size: S / M / L / XL โข Works completely offline โข Available in Italian, English and Spanish โข Quick search with filters (zone, level, notes) and history โข Favourites and recents on home screen 14-day free trial โ no card required. Then a one-time purchase of โฌ9.99. No subscription, ever.
Screenshots
Verdict
The clearest difference is ads: Rad Index at none against Flags Quiz's shown. Rad Index also leads on update cadence (fortnightly vs every 3 months). Flags Quiz's advantage is iOS requirement (12.0 vs 15.0). On price, in-app purchases and device support 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
Both are free to download. Flags Quiz 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.
Flags Quiz ships an update every 3 months, Rad Index fortnightly. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.
| Parameter | Flags Quiz | Rad Index |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Fortnightly โ better |
| Ads | Yes | No โ better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 โ better | 15.0 |
| Further details โ not scored | ||
| Size | 780 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Perfect Consulting B.V. | Simone Zen |
In-app purchases
Flags Quiz
- Full version$2.99
Rad Index
- Rad Index Premium$8.99
Questions
Is Flags Quiz free?
Is Rad Index free?
Do Flags Quiz or Rad Index have ads?
Which is updated more often, Flags Quiz or Rad Index?
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