Opioids Dosage Conversion vs ACP MKSAP
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).
ACP MKSAP
Access comprehensive internal medicine knowledge and practice exam-style questions offline. This app syncs your progress with the online version when connected to the internet. It's designed for physicians to stay updated on the latest evidence and enhance their clinical decision-making skills.
- Offline access to text and questions
- Thousands of exam-like multiple-choice questions
- Patient-based clinical scenarios
- Syncs progress with online version
- Includes figures, charts, and tables
- Targets knowledge gaps
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This app supplements the online version and is included with your ACP MKSAP subscription. Simply log in with your ACP or ACP MKSAP username and password. If you need assistance setting up your account, visit ACP Online. Some functionality within the app requires an active Internet connection. Your suggestions for future updates and enhanced features are welcome at mksap_editors@acponline.org. The new ACP Medical Knowledge Self-Assessment Program℠ (ACP MKSAP℠) provides you with the most current and critical information in the core of internal medicine and its subspecialties so you can stay aware of what you need to know as a practicing physician in internal medicine today. ACP MKSAP consists of well-researched text sections and thousands of exam-like multiple-choice questions along with hundreds of figures, charts, and tables to enhance your learning experience. ACP MKSAP's original, high-quality questions comprise patient-based clinical scenarios based on the latest evidence. Each question will challenge your decision-making, help you discover areas of strength, and target areas for you to update or acquire new knowledge. This app enables ACP MKSAP subscribers to read all of the text and answer all of the questions offline. When you are connected to the Internet, answers will sync automatically with the online version. The publisher of this app, the American College of Physicians, is the largest medical specialty organization in the United States with members in more than 145 countries worldwide. ACP membership includes 161,000 internal medicine physicians (internists), related subspecialists, and medical students. Internal medicine physicians are specialists who apply scientific knowledge and clinical expertise to the diagnosis, treatment, and compassionate care of adults across the spectrum from health to complex illness. Subscriber License Agreement: https://mksap.acponline.org/license
Screenshots
Verdict
The clearest difference is in-app purchases: Opioids Dosage Conversion at none against ACP MKSAP's 1. Opioids Dosage Conversion also leads on review sentiment (78% vs 57%). ACP MKSAP's advantage is update cadence (every 10 days vs every 4 months) and iOS requirement (13.0 vs 15.6). On price, rating, ratings volume and ads 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. ACP MKSAP sells 1 in-app purchase, starting at $999.99 per year. Opioids Dosage Conversion asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.3 for Opioids Dosage Conversion against 4.2 for ACP MKSAP. Both are backed by a comparable volume of ratings — 19 and 16 respectively. Written reviews are what separate them: 78% of Opioids Dosage Conversion's written reviews are positive against 57% of ACP MKSAP's.
Opioids Dosage Conversion ships an update every 4 months, ACP MKSAP every 10 days. Both last shipped on October 21, 2026.
| Parameter | Opioids Dosage Conversion | ACP MKSAP |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (19 ratings) — better | 4.2 (16 ratings) |
| Positive reviews | 77.8% of reviews — better | 57.1% of reviews |
| Number of ratings | 19 — better | 16 |
| Update frequency | Every 4 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 540 MB |
| Age rating | 17+ | 17+ |
| Developer | Chris Marcellino MD LLC | American College of Physicians |
Customer experience
Opioids Dosage Conversion
ACP MKSAP
In-app purchases
Opioids Dosage Conversion
No in-app purchases
ACP MKSAP
- Non-member in-app price$999.991 Year
Questions
Is Opioids Dosage Conversion free?
Is ACP MKSAP free?
Which has better reviews, Opioids Dosage Conversion or ACP MKSAP?
Do Opioids Dosage Conversion or ACP MKSAP have ads?
Which is updated more often, Opioids Dosage Conversion or ACP MKSAP?
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