# HemeOncBuddy vs Primum

The clearest difference is rating: HemeOncBuddy at 5.0 against Primum's 4.2. HemeOncBuddy also leads on monetization model (free vs ad-supported) and device support (3 vs 1). Primum's advantage is update cadence (every 2 months vs every 24 months). On price, review sentiment, 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.

HemeOncBuddy holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 18 and 5 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

HemeOncBuddy ships an update every 24 months, Primum every 2 months. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | HemeOncBuddy | Primum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (18 ratings)](https://appshunter.io/ios/app/hemeoncbuddy/id1579207336/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/primum/id6651755259/reviews) |
| Number of ratings | **18** | 5 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 2 months** |
| Monetization | **Free** | Ad-supported |
| Size | 16 MB | 75 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Veli Bakalov](https://appshunter.io/developer/1579207338) | [Primum](https://appshunter.io/developer/1707581637) |

## What reviewers say

### HemeOncBuddy

[App page](https://appshunter.io/ios/app/hemeoncbuddy/id1579207336)

This app provides quick access to practice-changing clinical trials in Hematology and Oncology. It offers simplified summaries of trial background, inclusion/exclusion criteria, primary endpoints, and outcomes for easy reference.

**Highlights:** Practice-changing clinical trial summaries, Hematology and Oncology focus, Simplified trial information, Inclusion and exclusion criteria, Primary endpoints and outcomes, Quick reference tool

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is HemeOncBuddy free?

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

### Is Primum free?

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

### Which has better reviews, HemeOncBuddy or Primum?

HemeOncBuddy is rated higher. HemeOncBuddy averages 5.0 out of 5 from 18 ratings, while Primum averages 4.2 from 5 ratings.

### Do HemeOncBuddy or Primum have ads?

Neither HemeOncBuddy nor Primum shows ads.

### Which is updated more often, HemeOncBuddy or Primum?

HemeOncBuddy ships an update every 24 months, and Primum every 2 months. Most recently, HemeOncBuddy was updated on October 24, 2026 and Primum on October 19, 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.*