Comparison

Primum vs Roon for Doctors

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Search and filter expert oncologists
  • Direct messaging with specialists
  • Real-time chat and notifications
  • Case-specific advice
  • Inbox management
  • Reference past inquiries
Features
Read full description

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

About

Roon for Doctors

A private digital space for verified physicians to connect, share knowledge, and discuss evolving clinical practices. It fosters collaboration across specialties and helps build trust in medical expertise.

Highlights
  • Verified physician-only community
  • Cross-specialty collaboration
  • Discussion of emerging treatments
  • Building trust in medical expertise
  • Secure and private connection
Features
Read full description

Roon is a physicians-only space to connect, share evolving knowledge, and shape the future of clinical practice. It’s your digital doctor’s lounge—built for today’s challenges, at the pace and purpose of modern care. With Roon, you can: - Connect safely: Trust that you're in a space with verified doctors only — no trolls, no bad actors. - Collaborate across specialties: Tap into a collective brain trust of doctors at the top of their fields. - Stay current: Discuss emerging treatments, research, and clinical gray areas. - Build trust: Reclaim the authority of expertise in medicine. The stakes have never been higher. Trust in science won’t be rebuilt by chance—it will be rebuilt by doctors, working together. Download Roon and join the community shaping the future of medicine.

Screenshots

Primum4 screens
Roon for Doctors4 screens

Verdict

The call

The clearest difference is rating: Roon for Doctors at 5.0 against Primum's 4.2. Roon for Doctors also leads on update cadence (weekly vs every 2 months) and monetization model (free vs ad-supported). On price, review sentiment, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

Roon for Doctors holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Roon for Doctors has 29 ratings behind it against 5, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Primum ships an update every 2 months, Roon for Doctors weekly. The most recent releases landed on October 19, 2026 and October 6, 2026 respectively.

Scorecard5 real differences · 5 level
Primum versus Roon for Doctors: the parameters behind the verdict, then further details
ParameterPrimumRoon for Doctors
PriceFreeFree
Rating4.2 (5 ratings)5.0 (29 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings529 — better
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.415.1 — better
Further details — not scored
Size75 MB114 MB
Age rating17+17+
DeveloperPrimumCareSpace Health

Customer experience

Primum

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Roon for Doctors

All ratings29 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Primum

No in-app purchases

None

Roon for Doctors

No in-app purchases

Questions

Is Primum free?
Primum is free to download, with no in-app purchases.
Is Roon for Doctors free?
Roon for Doctors is free to download, with no in-app purchases.
Which has better reviews, Primum or Roon for Doctors?
Roon for Doctors is rated higher. Primum averages 4.2 out of 5 from 5 ratings, while Roon for Doctors averages 5.0 from 29 ratings.
Do Primum or Roon for Doctors have ads?
Neither Primum nor Roon for Doctors shows ads.
Which is updated more often, Primum or Roon for Doctors?
Primum ships an update every 2 months, and Roon for Doctors weekly. Most recently, Primum was updated on October 19, 2026 and Roon for Doctors on October 6, 2026.

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