# Primum vs R2ISS Calculator

The clearest difference is rating: R2ISS Calculator at 5.0 against Primum's 4.2. R2ISS Calculator also leads on monetization model (free vs ad-supported). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

R2ISS Calculator holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 5 and 2 respectively.

## The numbers

| Metric | Primum | R2ISS Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/primum/id6651755259/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/r2iss-calculator/id6740468848/reviews)** |
| Number of ratings | **5** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Ad-supported | **Free** |
| Size | 75 MB | 0 MB |
| Requires iOS | **16.4** | 16.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Primum](https://appshunter.io/developer/1707581637) | [Taya Salman](https://appshunter.io/developer/1790119115) |

## What reviewers say

### Primum

[App page](https://appshunter.io/ios/app/primum/id6651755259)

Connect with expert oncologists for case-specific advice and treatment decision support. This app facilitates direct messaging with specialists, offering actionable insights and a platform to manage your inquiries efficiently.

**Highlights:** Search and filter expert oncologists, Direct messaging with specialists, Real-time chat and notifications, Case-specific advice, Inbox management, Reference past inquiries

**Features:** macOS Compatibility, iMessage stickers

**In-app purchases:** none


### R2ISS Calculator

[App page](https://appshunter.io/ios/app/r2iss-calculator/id6740468848)

This medical tool accurately stages multiple myeloma using the Revised International Staging System (R2-ISS). It incorporates traditional ISS criteria, chromosomal abnormalities, and serum LDH levels based on the latest clinical guidelines.

**Highlights:** R2-ISS staging for multiple myeloma, Incorporates traditional ISS criteria, Includes high-risk chromosomal abnormalities, Utilizes serum lactate dehydrogenase (LDH), Based on latest clinical guidelines

**In-app purchases:** none


## Frequently asked questions

### Is Primum free?

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

### Is R2ISS Calculator free?

R2ISS Calculator is free to download, with no in-app purchases.

### Which has better reviews, Primum or R2ISS Calculator?

R2ISS Calculator is rated higher. Primum averages 4.2 out of 5 from 5 ratings, while R2ISS Calculator averages 5.0 from 2 ratings.

### Do Primum or R2ISS Calculator have ads?

Neither Primum nor R2ISS Calculator shows ads.

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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.*