Primum vs HemOncBytes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Primum
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.
- Search and filter expert oncologists
- Direct messaging with specialists
- Real-time chat and notifications
- Case-specific advice
- Inbox management
- Reference past inquiries
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Sometimes even the experts need experts. Primum helps oncologists get more confidence in their treatment decisions by making it easy to find other expert oncologists and get actionable, case-specific advice fast. The official Primum app puts high-quality advice from expert oncologists in your pocket. "Prompt response. Excellent suggestions outlining the different treatment options/approaches for a rare clinical scenario without much data in the literature to guide decision making" - Community Oncologist, FL "It was really helpful to hear the expert recommendations and I agree with his recommendations. This topic is quite interesting and difficult to deal with. I appreciate a lot the recommendations." - Community Oncologist, MA "Very detailed response, clear thought process, mentioned experience with similar case. Overall - excellent!" - Community Oncologist, CT Find and select an expert - Search with keywords or phrases - Filter for expertise based on focus area - Review their experience before choosing to message Message an expert directly - Choose the expert you wish to message - Submit a brief description of your question directly to your chosen expert - Chat in real-time if you are both online, or get notified when they respond Get notified of important inquiry updates - See when you have unread messages - View the count of unread messages - Receive text and/or email alerts when you get a new message, a new inquiry, or when an inquiry is closed Rate your experience - Submit ratings and feedback on every question, to help Primum and our experts improve Manage your inbox - Keep your inbox uncluttered and focused by closing inquiries once they have been answered Reference past questions - View all closed inquiries to refer to past questions and answers
HemOncBytes
Stay current with hematology and oncology information through concise, actionable updates. This app uses a microlearning and active recall method to boost clinical confidence and decision-making speed. Content is clinically relevant and vetted by practicing oncologists.
- Quick, actionable bytes of information
- Microlearning and active recall
- Clinically relevant content
- Vetted by practicing oncologists
- Boosts clinical confidence
- Practice-changing updates
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Are you drowning in oncology information overload? There's a better way to stay current in oncology. HemOncBytes delivers core heme/onc knowledge + practice-changing updates in quick, actionable bytes. * Reclaim hours weekly * Boost clinical confidence * Make informed decisions, faster Learn smarter, not harder. Our unique Bytes Method combines microlearning with active recall, ensuring you not only learn faster but retain more. Created and vetted by practicing oncologists, every piece of content is clinically relevant, immediately applicable, and designed to help you make confident decisions at the point of care.
Screenshots
Verdict
The clearest difference is rating: HemOncBytes at 5.0 against Primum's 4.2. HemOncBytes also leads on ads (none vs shown). Primum's advantage is in-app purchases (none vs 1). On price, review sentiment, ratings volume and update cadence 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
Both are free to download. HemOncBytes sells 1 one-off in-app purchase. Primum asks for nothing beyond the download.
HemOncBytes holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 5 and 7 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 2, 2026 and September 20, 2026 respectively.
| Parameter | Primum | HemOncBytes |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (5 ratings) | 5.0 (7 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 5 | 7 — better |
| Update frequency | Every 2 months | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.1 — better | 15.2 |
| Further details — not scored | ||
| Size | 53 MB | 112 MB |
| Age rating | 17+ | 4+ |
| Developer | PRIMUM HEALTH, INC. | VitalFolio LLC |
Customer experience
Primum
HemOncBytes
In-app purchases
Primum
No in-app purchases
HemOncBytes
- Best of ASCO 2025$100.00







