# Radiology Core vs NIS+RISC Prep

The clearest difference is price: Radiology Core at Free against NIS+RISC Prep's $9.99. Radiology Core also leads on iOS requirement (9.0 vs 15.1). NIS+RISC Prep's advantage is update cadence (every 9 days vs every 22 months) and ratings volume (11 vs 1). On rating, review sentiment, ads and in-app purchases there is nothing between them.

Radiology Core is free to download; NIS+RISC Prep costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Radiology Core against 5.0 for NIS+RISC Prep. That said, the two scores are not equally well evidenced: NIS+RISC Prep has 11 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Radiology Core ships an update every 22 months, NIS+RISC Prep every 9 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Radiology Core | NIS+RISC Prep |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/radiology-core-physics/id1178469466/reviews) | [5.0 (11 ratings)](https://appshunter.io/ios/app/nis-plus-risc-prep/id6764441298/reviews) |
| Number of ratings | 1 | **11** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 9 days** |
| Monetization | **Free** | Paid |
| Size | 20 MB | 33 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Lieu Duong](https://appshunter.io/developer/1657425589) | [Shawn Thomas](https://appshunter.io/developer/1895782155) |

## What reviewers say

### Radiology Core

[App page](https://appshunter.io/ios/app/radiology-core-physics/id1178469466)

Prepare for your Radiology Core Exam with this free resource. It offers a growing question bank to help you study. Contact the developer with feedback for improvements.

**Highlights:** Radiology Core Exam preparation, Physics subject focus, Growing question bank, Free resource, Feedback integration

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### NIS+RISC Prep

[App page](https://appshunter.io/ios/app/nis-plus-risc-prep/id6764441298)

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.

**Highlights:** 700+ board-style questions, Detailed explanations, Progress tracking, Timed test mode, Full-text search, Light and dark mode, Cross-device sync

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Radiology Core free?

Radiology Core is free to download, with no in-app purchases.

### Is NIS+RISC Prep free?

NIS+RISC Prep costs $9.99, with no in-app purchases.

### Which has better reviews, Radiology Core or NIS+RISC Prep?

Radiology Core and NIS+RISC Prep are both rated 5.0 out of 5 on the App Store, from 1 and 11 ratings respectively.

### Do Radiology Core or NIS+RISC Prep have ads?

Neither Radiology Core nor NIS+RISC Prep shows ads.

### Which is updated more often, Radiology Core or NIS+RISC Prep?

Radiology Core ships an update every 22 months, and NIS+RISC Prep every 9 days. Most recently, Radiology Core was updated on October 24, 2026 and NIS+RISC Prep on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*