Comparison

Caris+ vs Primum

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

Head to head
About

Caris+

Access and manage your Caris profiling cases on the go. View patient results, track testing progress, and receive real-time notifications. Approve orders and explore interactive results with potential clinical trial matches.

Highlights
  • View and search cases
  • Real-time case notifications
  • Track testing progress
  • Approve orders
  • Interactive results
  • Clinical trial matching
  • Request molecular tumor board review
Features
Read full description

The Caris+ App provides convenient access to manage and review Caris profiling cases. View current and past patient results whenever and wherever you are. • View and search current and past cases • Receive real-time case notifications • Track testing progress • Approve orders • View interactive results and select clinical trial matches • Request Caris Molecular Tumor Board review • Share patient educational information About Caris Life Sciences Caris Life Sciences® is a leading innovator in molecular science and artificial intelligence focused on fulfilling the promise of precision medicine through quality and innovation. The company’s suite of market-leading molecular profiling offerings assesses DNA, RNA and proteins to reveal a molecular blueprint that helps physicians and cancer patients make more precise and personalized treatment decisions. Caris is also advancing precision medicine with Caris Artificial Intelligence, combining its market leading service offering, Caris Molecular Intelligence® with its proprietary artificial intelligence analytics engine, DEAN™. This information, coupled with mature clinical outcomes on thousands of patients, provides unmatched molecular solutions for patients, physicians, payers and biopharmaceutical organizations.

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

Screenshots

Caris+4 screens
Primum4 screens

Verdict

The call

The clearest difference is ads: Caris+ at none against Primum's shown. Caris+ also leads on rating (4.4 vs 4.2) and monetization model (free vs ad-supported). Primum's advantage is review sentiment (100% vs 67%). On price, ratings volume, update cadence 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

Caris+ holds the better App Store score, 4.4 against 4.2. Both are backed by a comparable volume of ratings — 7 and 5 respectively. Written reviews complicate that: 67% of Caris+'s written reviews are positive against 100% of Primum's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Caris+ ships an update monthly, Primum every 2 months. The most recent releases landed on September 17, 2026 and August 4, 2026 respectively.

Scorecard4 real differences · 6 level
Caris+ versus Primum: the parameters behind the verdict, then further details
ParameterCaris+Primum
PriceFreeFree
Rating4.4 (7 ratings) — better4.2 (5 ratings)
Positive reviews66.7% of reviews100.0% of reviews — better
Number of ratings7 — better5
Update frequencyMonthly — betterEvery 2 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.015.1 — better
Further details — not scored
Size23 MB53 MB
Age rating17+17+
DeveloperCaris MPI, Inc.PRIMUM HEALTH, INC.

Customer experience

Caris+

All ratings7 ratings
Positive85.7%
Neutral0.0%
Negative14.3%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Primum

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

In-app purchases

None

Caris+

No in-app purchases

None

Primum

No in-app purchases

Questions

Is Caris+ free?
Caris+ 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, Caris+ or Primum?
Caris+ is rated higher. Caris+ averages 4.4 out of 5 from 7 ratings, while Primum averages 4.2 from 5 ratings.
Do Caris+ or Primum have ads?
Primum shows ads; Caris+ does not.
Which is updated more often, Caris+ or Primum?
Caris+ ships an update monthly, and Primum every 2 months. Most recently, Caris+ was updated on September 17, 2026 and Primum on August 4, 2026.

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