Comparison

Opioids Dosage Conversion vs MedHub

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

Head to head
About

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.

Highlights
  • Opioid dosage conversion
  • Multiple drug support
  • Multiple route support
  • Breakthrough dosing calculator
  • Incomplete cross tolerance option
  • Instructional details
Features
Read full description

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).

About

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.

Highlights
  • View calendar and schedule
  • Complete and send evaluations
  • Submit work hours
  • Log procedures
  • Access performance summaries
  • Institutional Single Sign-On
Features
Read full description

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

Opioids Dosage Conversion4 screens
MedHub4 screens

Verdict

The call

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

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

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
Opioids Dosage Conversion versus MedHub: the parameters behind the verdict, then further details
ParameterOpioids Dosage ConversionMedHub
PriceFreeFree
Rating4.3 (19 ratings)4.7 (5K ratings) — better
Positive reviews77.8% of reviews — better17.9% of reviews
Number of ratings195K — better
Update frequencyEvery 4 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17
Further details — not scored
Size2 MB21 MB
Age rating17+17+
DeveloperChris Marcellino MD LLCMedHub

Customer experience

Opioids Dosage Conversion

All ratings17 ratings
Positive82.4%
Neutral5.9%
Negative11.8%
Written reviews45 reviews
Positive77.8%
Neutral13.3%
Negative8.9%

MedHub

All ratings5,004 ratings
Positive93.3%
Neutral2.2%
Negative4.5%
Written reviews28 reviews
Positive17.9%
Neutral7.1%
Negative75.0%

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

None

Opioids Dosage Conversion

No in-app purchases

None

MedHub

No in-app purchases

Questions

Is Opioids Dosage Conversion free?
Opioids Dosage Conversion is free to download, with no in-app purchases.
Is MedHub free?
MedHub is free to download, with no in-app purchases.
Which has better reviews, Opioids Dosage Conversion or MedHub?
MedHub is rated higher. Opioids Dosage Conversion averages 4.3 out of 5 from 19 ratings, while MedHub averages 4.7 from 5K ratings.
Do Opioids Dosage Conversion or MedHub have ads?
Neither Opioids Dosage Conversion nor MedHub shows ads.
Which is updated more often, Opioids Dosage Conversion or MedHub?
Opioids Dosage Conversion ships an update every 4 months, and MedHub every 3 months. Most recently, Opioids Dosage Conversion was updated on November 1, 2026 and MedHub on November 13, 2026.

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