# SIR Guidelines vs NIS+RISC Prep

The clearest difference is price: SIR Guidelines at Free against NIS+RISC Prep's $4.99. NIS+RISC Prep's advantage is chart position (#199 vs unranked) and update cadence (every 9 days vs every 3 weeks). On rating, ratings volume, ads and in-app purchases there is nothing between them.

SIR Guidelines 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.

On the App Store both sit at effectively the same score — 5.0 for SIR Guidelines against 5.0 for NIS+RISC Prep. Both are backed by a comparable volume of ratings — 23 and 11 respectively.

SIR Guidelines 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.

## The numbers

| Metric | SIR Guidelines | NIS+RISC Prep |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [5.0 (23 ratings)](https://appshunter.io/ios/app/sir-guidelines/id1552455529/reviews) | [5.0 (11 ratings)](https://appshunter.io/ios/app/nis-plus-risc-prep/id6764441298/reviews) |
| Number of ratings | **23** | 11 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#199** |
| Size | 28 MB | 33 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Society of Interventional Radiology](https://appshunter.io/developer/508819578) | [Shawn Thomas](https://appshunter.io/developer/1895782155) |

## What reviewers say

### SIR Guidelines

[App page](https://appshunter.io/ios/app/sir-guidelines/id1552455529)

Access evidence-based recommendations and tools for healthcare professionals. Features an interactive calculator for scenario-specific anticoagulation and antibiotic advice, simplifying clinical decision-making at the point of care.

**Highlights:** Access published guidelines and statements, Interactive periprocedural recommendation calculator, Scenario-specific anticoagulation and antibiotic recommendations, Tailored recommendations based on patient and procedural risk, Clinical Practice Guidelines for IVC Filters, Continual updates with new guidelines and tools

**Features:** macOS Compatibility

**In-app purchases:** none


### NIS+RISC Prep

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

**Currently charting:** #199 Top Paid · Medical (US App Store)

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 SIR Guidelines free?

SIR Guidelines is free to download, with no in-app purchases.

### Is NIS+RISC Prep free?

NIS+RISC Prep costs $4.99, with no in-app purchases.

### Which has better reviews, SIR Guidelines or NIS+RISC Prep?

SIR Guidelines and NIS+RISC Prep are both rated 5.0 out of 5 on the App Store, from 23 and 11 ratings respectively.

### Do SIR Guidelines or NIS+RISC Prep have ads?

Neither SIR Guidelines nor NIS+RISC Prep shows ads.

### Which is updated more often, SIR Guidelines or NIS+RISC Prep?

SIR Guidelines ships an update every 3 weeks, and NIS+RISC Prep every 9 days. Most recently, SIR Guidelines was updated on October 13, 2026 and NIS+RISC Prep on October 10, 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.*