MARLIN Study vs OpenVet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MARLIN Study
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You will use this app to complete study questionnaires and access study resources for the ML44914 observational study.
OpenVet
This AI-powered tool assists veterinarians and veterinary students with clinical decision-making by providing quick access to patient records, drug information, and diagnostic guidance. It helps manage cases, look up drug monographs, and answer urgent questions, all within a unified workspace.
- AI clinical decision support
- Patient record integration
- Veterinary drug reference
- Weight-based dose calculations
- Emergency & Critical Care room
- Voice dictation
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For the patients who keep you on your toes. OpenVet brings clinical questions, patient records, and veterinary drug reference into one workspace for veterinarians and veterinary students. WORK THROUGH THE CASE Ask about differentials, diagnostic workups, and treatment considerations. Review the answer and inspect the references provided before deciding what comes next. BRING THEIR HISTORY WITH YOU Link a patient to a case so their weight, medications, allergies, diagnoses, and recorded lab results can inform the discussion. Keep supported PDFs and images with the chart, including the original documents. KEEP YOUR FORMULARY CLOSE Look up drug monographs, review interaction warnings, and use weight-based dose tools with displayed reference ranges. Check the primary source before prescribing or administering any medication. MAKE ROOM FOR URGENT QUESTIONS Open the Emergency & Critical Care room for triage, stabilization, and toxicology questions. A CPR metronome provides a pacing tool. SAY THE QUESTION Dictate into the question box, review the transcription, and send when you’re ready. WHO IT’S FOR Accounts are available to licensed veterinarians and veterinary students. US veterinarians provide a state license number. Students and internationally licensed veterinarians can begin while credentials are reviewed. Veterinary technicians and other non-DVM staff cannot create accounts yet. OpenVet provides AI clinical decision support. It can make mistakes and does not replace professional judgment. Verify clinical information, doses, and species-specific guidance against primary sources before acting. Dose calculations are not prescriptions.
Screenshots
Verdict
The clearest difference is update cadence: OpenVet at every 5 days against MARLIN Study's every 6 weeks. MARLIN Study's advantage is iOS requirement (12.0 vs 16.2). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
MARLIN Study ships an update every 6 weeks, OpenVet every 5 days. The most recent releases landed on October 18, 2026 and October 25, 2026 respectively.
| Parameter | MARLIN Study | OpenVet |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (7 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 7 — better |
| Update frequency | Every 6 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.2 |
| Further details — not scored | ||
| Size | 149 MB | 3 MB |
| Age rating | 17+ | 17+ |
| Developer | Hello Thread | OpenVet Inc. |
In-app purchases
MARLIN Study
No in-app purchases
OpenVet
No in-app purchases









