NIS & RISC Review

iOS & Android

Offline prep for the NIS and RISC sections of the diagnostic radiology Core and Certifying exams

App Store Google Play

Screenshots

Today dashboard with an exam countdown, study streak, progress stats and a next-up lesson from the weakest domain, promo poster reading 'NIS & RISC, covered.'

Learn tab listing RISC domains, each tagged with an abbreviated Essentials sheet, promo poster reading 'Cram the day before.'

Essentials cram sheet for regulatory exposure limits with a dose-limit table and a high-yield callout, promo poster reading 'The must-know core.'

Practice depth selector offering Everything, High-yield, Must-know and Essentials, promo poster reading 'Everything, or essentials.'

Scenario question on decay-in-storage of radioactive waste, graded with a cited explanation, promo poster reading 'Every choice, explained.'

Half-life ladder reference table of radionuclides with order-of-magnitude memory anchors, promo poster reading 'Ballpark the hard ones.'

Lesson on regulatory exposure limits with an original bar-chart figure of dose limits by population, promo poster reading 'Redrawn, not copied.'

Readiness tab showing an overall RISC score and per-domain mastery against the blueprint, weakest first, promo poster reading 'Score, by domain.'

Covers the NIS and RISC sections only — not the Core or Certifying exams as a whole. An independent study aid. Not affiliated with, endorsed by, or sponsored by the American Board of Radiology (ABR) or any certifying body. Content is for educational use only and is not medical advice.

Cited lessons and essentials sheets

37 concise lessons with high-yield callouts, dose tables, and source chips, plus an abbreviated “Essentials” cram sheet for every domain — so you can trace every fact, or make a fast pass the day before.

A blueprint-weighted question bank

458 board-style questions, selected against each domain's share of the blueprint and scored by domain, so your practice mix and your readiness score both reflect where the exam actually puts its questions.

Entirely offline, entirely anonymous

No account, no sign-up, no ads, no tracking. The content ships inside the app and your study progress never leaves your device — the one exception is the in-app purchase, which is validated over the network.

Free to start, then one $4.99 unlock

Free

RISC — radiation protection, and the mathematics of radioactivity measurement
NIS — professionalism, and the core concepts of quality and safety
Full lessons, essentials sheets, and questions for those four sections
The readiness dashboard, search, and progress tracking

Full access — one $4.99 purchase

Every remaining section of both guides, with all their lessons, essentials sheets, and questions
The complete question bank across every practice pool
Every future content update, including revisions for later exam cycles
One time, not a subscription — yours forever, on both iPhone and iPad

Collects Nothing

NIS & RISC Review has no accounts and no backend for your studying. There is no analytics SDK, no advertising, and no crash reporting — your study history stays on your device. The app makes a network request in exactly one situation: buying or restoring the full-access unlock, which sends purchase-validation data to our payments processor and nothing else.

Need Help?

Questions, technical problems, or a bug to report? Reach out and we'll get back to you.

Spotted a factual error in a question or lesson? Tap Report an issue on the item to flag it, then send it along with Settings → Export. The app keeps your reports on your device rather than transmitting them.