Comparison

Primum vs Doktu

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

Doktu

Features
Read full description

Keep your society's conversation alive between meetings. Doktu is a private, invite-only community with live audio, dedicated to a single oncology society. Society engagement is largely confined to email blasts and infrequent events. Doktu gives societies a private, society-owned space for ongoing professional discussion and live audio between meetings. COMMUNITY FEED A persistent, society-owned feed for announcements and professional discussion. It ensures key messages are seen and conversations continue between meetings. Browse society announcements, research highlights, and member questions. Reply in threads that keep in-depth conversation organized. LIVE AUDIO EVENTS Short, focused live audio sessions that extend engagement beyond scheduled events. Join real-time discussions with colleagues for conference debriefs, mentorship, practice ops, and society updates, with moderated Q&A and chat with no camera required. Schedule and discover society events with integrated reminders. WHAT DOKTU IS Private, invite-only community for one society Live audio events between meetings Society-owned discussion and content Professional connection and mentorship space WHAT DOKTU ISN'T Not clinical decision support Not a tumor board replacement Not a place for patient-specific discussions Not a public social network VERIFIED MEMBERSHIP Access is controlled through a society-managed whitelist. Only members whose email addresses have been approved by the society can join. Society leadership retains control over content, membership, and community guidelines. Doktu is a professional network. Not medical advice. No patient-identifiable information. Access requires an invitation from a participating society. If yours has not launched Doktu yet, visit joindoktu.com.

Screenshots

Primum4 screens
Doktu4 screens

Verdict

The call

The clearest difference is update cadence: Doktu at every 2 days against Primum's every 2 months. On price, ads, in-app purchases and device support 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.

UpkeepUpdate frequency

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

Scorecard1 real difference · 9 level
Primum versus Doktu: the parameters behind the verdict, then further details
ParameterPrimumDoktu
PriceFreeFree
Rating4.2 (5 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 2 monthsEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhoneiPhone, iPod — better
Requires iOS16.415.1 — better
Further details — not scored
Size75 MB66 MB
Age rating17+17+
DeveloperPrimumDoktu LLC

In-app purchases

None

Primum

No in-app purchases

None

Doktu

No in-app purchases

Questions

Is Primum free?
Primum is free to download, with no in-app purchases.
Is Doktu free?
Doktu is free to download, with no in-app purchases.
Do Primum or Doktu have ads?
Neither Primum nor Doktu shows ads.
Which is updated more often, Primum or Doktu?
Primum ships an update every 2 months, and Doktu every 2 days. Most recently, Primum was updated on October 19, 2026 and Doktu on October 24, 2026.

Other comparisons