ContrastRx vs NIS+RISC Prep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ContrastRx
Provides quick access to treatment regimens for life-threatening reactions to radiographic contrast agents. Includes clinical descriptions, visual examples, and treatment protocols, along with helpful calculators and information on nephrogenic systemic fibrosis.
- Treatment regimens for contrast reactions
- Clinical descriptions and pictorial examples
- eGFR calculator
- Pediatric dose calculator
- Steroid pretreatment regimens
- Nephrogenic systemic fibrosis overview
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This app provides quick access to treatment regimens for potentially life-threatening reactions that can occur with iodine or gadolinium radiographic contrast. Included are clinical descriptions, pictorial examples, sound clips, and treatment regimens for the various types of reactions. Also included are a pediatric dose calculator, an eGFR calculator, a self-assessment module, pretreatment medication regimens, and an overview of nephrogenic systemic fibrosis.
NIS+RISC Prep
Prepare for the ABR Core Exam's Non-Interpretive Skills and Radioisotope Safety sections with over 700 board-style questions. Features detailed explanations, progress tracking, and a distraction-free interface with light and dark modes. Syncs progress across iPhone and iPad.
- 700+ board-style questions
- Detailed explanations
- Progress tracking
- Timed test mode
- Full-text search
- Light and dark mode
- Cross-device sync
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Don't miss the easy ones. NIS+RISC Prep is the dedicated question bank for the Non-Interpretive Skills and Radioisotope Safety Content sections of the 2026 ABR Core Exam. 700+ board-style questions, built from the ground up for radiologists who want to walk into exam day confident on the NIS+RISC material. DESIGNED FOR HOW YOU ACTUALLY STUDY A clean, focused interface that gets out of your way. Every screen is crafted to reduce cognitive load so you can stay in flow. Switch between light and dark mode to match your environment — at your desk or on call. HIGH YIELD QUESTIONS, DETAILED EXPLANATIONS Every question is written to reflect the content of the ABR Core Exam. Detailed explanations accompany each answer so you understand the reasoning, not just the result. Build confidence in the concepts that show up most on exam day. KNOW EXACTLY WHERE YOU STAND Your home screen shows a live breakdown of every question in the bank — correct, incorrect, and unused — so you always know your coverage at a glance. Session results break down your score chapter by chapter, and your full session history lets you track improvement over time. SEARCH EVERYTHING Full-text search across all 700+ questions finds any topic instantly, with filters to narrow by attempt status. DESIGNED FOR FOCUS Clean and distraction-free, with light and dark mode, native iOS feel, and full iPhone and iPad support. Your progress syncs across devices automatically. FEATURES • 700+ questions aligned to the 2026 ABR NIS and RISC study guides • Tutor Mode with instant feedback • Timed Test Mode (60 sec/question) • Custom sessions by question status and chapter • Full-text search across the entire question bank • Progress tracking with chapter-by-chapter breakdowns • Session history and review • Flag questions to revisit • Light and dark mode • iPhone and iPad with synced progress • One-time purchase — no subscription, no ads
Screenshots
Verdict
The clearest difference is review sentiment: NIS+RISC Prep at 100% against ContrastRx's 50%. NIS+RISC Prep also leads on rating (5.0 vs 4.4) and update cadence (every 9 days vs every 3 weeks). ContrastRx's advantage is price (Free vs $4.99). On ratings volume, 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
ContrastRx is free to download; NIS+RISC Prep costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
NIS+RISC Prep holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 9 and 11 respectively. Written reviews point the same way: 50% of ContrastRx's written reviews are positive against 100% of NIS+RISC Prep's.
ContrastRx ships an update every 3 weeks, NIS+RISC Prep every 9 days. The most recent releases landed on October 13, 2026 and October 10, 2026 respectively.
| Parameter | ContrastRx | NIS+RISC Prep |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 4.4 (9 ratings) | 5.0 (11 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 9 | 11 — better |
| Update frequency | Every 3 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Best chart rank | — | #198 — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 9 MB | 33 MB |
| Age rating | 17+ | 17+ |
| Developer | Mayo Clinic | Shawn Thomas |
Customer experience
ContrastRx
NIS+RISC Prep
In-app purchases
ContrastRx
No in-app purchases
NIS+RISC Prep
No in-app purchases
Questions
Is ContrastRx free?
Is NIS+RISC Prep free?
Which has better reviews, ContrastRx or NIS+RISC Prep?
Do ContrastRx or NIS+RISC Prep have ads?
Which is updated more often, ContrastRx or NIS+RISC Prep?
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