Opioids Dosage Conversion vs MedHub
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Opioids Dosage Conversion
This app is a calculator for trained medical professionals to convert opioid analgesic dosages. It supports various common opioids and administration routes, offering features like breakthrough dosing and cross-tolerance calculations.
- Opioid dosage conversion
- Multiple drug support
- Multiple route support
- Breakthrough dosing calculator
- Incomplete cross tolerance option
- Instructional details
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Opioids by Chris Marcellino MD and Norris Vivatrat MD is an opioid analgesic dosage conversion calculator for use by trained medical professionals. The application supports conversion to and from opioids commonly prescribed and used in U.S. hospitals orally, parenterally, or transdermally, including morphine, codeine, hydromorphone, hydrocodone, fentanyl, methadone, oxycodone and oxymorphone. The application is intended to help and instruct in the process of conversion of opioid regimens. • Native support for iPhone, iPad and iPod touch • Multiple route support • Multiple drug support • Incomplete cross tolerance option • Breakthrough dosing calculator • Provides instructional details about each calculation • Saves last calculation on exit • Supports landscape and portrait modes • Reference guide By Professor EBM, the Internal Medicine Residency Teaching Resource for Evidence-Based Medicine: http://www.professorebm.com/, a resource of the Santa Clara Valley Medical Center. While effort has been made to ensure that calculations are accurate and that conversion factors are in accordance with current accepted medical practices, use of this application is entirely at your own risk. This application should only be used by trained medical professionals and all results should be double checked by hand. Use of the app requires acceptance of the terms of use that are included with the application. Please send support requests and feedback using the link in the About tab of the app, though as a free academic tool we only have limited resources to address new feature requests. Opioid equipotency data is taken from CAPC conversion values except where noted (see the reference tab in the app.) CAPC values are as published in the Center to Advance Palliative Care Prescribing Opioids: A Reference Guide curriculum, which are adapted from McPherson ML. Demystifying Opioid Conversion Calculations: A Guide for Effective Dosing, 2nd ed. American Society of Health-System Pharmacists, Bethesda, Maryland, 2018. EPEC values are as published in EPEC-O Participants Handbook, 2005. Chris Marcellino, MD — Mayo Clinic Norris Vivatrat, MD — UCSD Medical Center Special thanks to Dr. Tom Mouser (EveryStep, Des Moines, IA) and Dr. David Rand (UVM Medical Center).
MedHub
Manage your medical training tasks efficiently from your mobile device. View schedules, complete evaluations, submit work hours, and log procedures. This app requires an existing MedHub account for trainees and faculty.
- View calendar and schedule
- Complete and send evaluations
- Submit work hours
- Log procedures
- Access performance summaries
- Institutional Single Sign-On
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View Calendar, Complete Evaluations, Submit Work Hours and Log Procedures on the go. *This app is a companion to MedHub solutions for existing trainee and faculty users* Extend the benefits of MedHub to your iPhone while you’re on the go! Simply download now and login with your existing account to start completing tasks. Features Include: • Access with institutional Single Sign-On credentials • View Calendar, Conferences and Schedule information • Send and complete Evaluations • Access Evaluation summaries and performance progression • Submit Work Hours and view weekly compliance summaries • Log Procedures and review requirements progress • Procedure Verification for Faculty & Residents • Receive helpful reminders and push notifications • Use iOS dictation to submit Evaluation feedback User Requirements: • Valid MedHub trainee or faculty user account Additional features that will simplify trainee and faculty tasks are in currently in development and scheduled for release in 2020, including: • Messaging • Program Resources
Screenshots
Verdict
The clearest difference is review sentiment: Opioids Dosage Conversion at 78% against MedHub's 18%. Opioids Dosage Conversion also leads on iOS requirement (15.6 vs 17). MedHub's advantage is rating (4.7 vs 4.3) and ratings volume (5K vs 19). On price, update cadence, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
MedHub holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: MedHub has 5K ratings behind it against 19, so its average is the more settled of the two. Written reviews complicate that: 78% of Opioids Dosage Conversion's written reviews are positive against 18% of MedHub's, so the app with the better star average is not the one people write more warmly about.
Opioids Dosage Conversion ships an update every 4 months, MedHub every 3 months. The most recent releases landed on November 1, 2026 and November 13, 2026 respectively.
| Parameter | Opioids Dosage Conversion | MedHub |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (19 ratings) | 4.7 (5K ratings) — better |
| Positive reviews | 77.8% of reviews — better | 17.9% of reviews |
| Number of ratings | 19 | 5K — better |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17 |
| Further details — not scored | ||
| Size | 2 MB | 21 MB |
| Age rating | 17+ | 17+ |
| Developer | Chris Marcellino MD LLC | MedHub |
Customer experience
Opioids Dosage Conversion
MedHub
Bugs and requests
Opioids Dosage Conversion
Not enough reviews yet to summarise bugs or requests.
MedHub
Reported bugs
4 issues- Cannot key in working hours after update
- Hours entered disappear after submission
- Procedure logging errors
- Evaluations not working properly
Requested features
4 requests- View evaluations
- Ability to log conference attendance hours
- Save default locations and supervisor names
- Batch procedure logging
In-app purchases
Opioids Dosage Conversion
No in-app purchases
MedHub
No in-app purchases








