Opioid Calculator vs ASCAR
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Opioid Calculator
This medical tool calculates the total oral Morphine Equivalent Daily Dose (oMEDD) for patients using multiple opioids. It aims to simplify complex calculations for clinical practice, education, and research.
- Calculate oral Morphine Equivalent Daily Dose (oMEDD)
- Simplify calculations for combined opioids
- Facilitate clinical practice
- Support medical education
- Aid research
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This Opioid Calculator Application is a tool for the calculation of total oral Morphine Equivalent Daily Dose (oMEDD). A particular design feature of the app is that it simplifies the calculation of oMEDD in cases where combinations of opioids are used. It is designed to provide easy accessibility and consistency to facilitate research, improve education and fill a void in the availability of reference conversion data in clinical practice. This opioid calculator is produced by the Faculty of Pain Medicine of the Australian and New Zealand College of Anaesthetists (FPM ANZCA) which is the peak body responsible for the education, training, continuing professional development and maintenance of standards of clinical practice for specialist pain medicine physicians in Australia and New Zealand.
ASCAR
This app provides a comprehensive, up-to-date library of cognitive aids for anaesthetists to support planning and crisis response in operating theatres. It features a paediatric dose calculator and advanced search functionality for quick access to critical information, even offline.
- Complete ASCAR library
- Paediatric Dose Calculator
- Offline access
- Advanced search function
- Automatically updated aids
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Integrate cognitive aids into your anaesthetic practice today! The ASCAR app has been designed by clinicians for clinicians with the aim of supporting Operating Theatre (OT) teams to plan and brief for complex cases effectively as well as respond appropriately to crises. The app allows you to carry in your pocket, the ever expanding library of ASCAR cognitive aids – so they are available in their most up-to-date version on your device whenever and wherever you are. Just select the subspecialty to locate the cognitive aid you are looking for… or, alternatively, use our advanced search function. The next time you find yourself in an OT full of responding staff, why not contribute by opening the app to assist the team in focusing on the clinical priorities and avoiding blindspots. Features: • Complete ASCAR library: automatically updated suite of cognitive aids from the ASCAR group across the whole array of anaesthetic sub-specialties. • Paediatric Dose Calculator: Proprietary paediatric anaesthesia calculator to assist you with looking after our most vulnerable patients. • Offline access: all files and our calculator remain accessible – even offline. But any updates will require an internet connection. • Advanced search function: to minimise the time and facilitate the ergonomics of finding the aid that you need at that moment of crisis. About us: ASCAR stands for AnaeSthesia Cognitive Aids and Research. We are a not-for-profit Human Factors interest group that was conceived at the Anaesthetic Department, at the Royal North Shore Hospital in Sydney. Our mission is to support our colleagues to perform excellently during crises, by researching, designing, and testing cognitive aids that are optimised for our high stakes environment. Through an understanding of strong aesthetic design, team dynamics, and ergonomics our goal is to advance the creation of clinical support tools for anaesthetists worldwide.
Screenshots
Verdict
The clearest difference is price: ASCAR at Free against Opioid Calculator's $0.99. ASCAR also leads on update cadence (every 2 months vs every 6 months). Opioid Calculator's advantage is chart position (#136 vs unranked). On review sentiment, 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
ASCAR is free to download; Opioid Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Opioid Calculator ships an update every 6 months, ASCAR every 2 months. The most recent releases landed on November 11, 2026 and November 3, 2026 respectively.
| Parameter | Opioid Calculator | ASCAR |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 3.7 (9 ratings) — better | — |
| Positive reviews | 81.3% of reviews | 87.5% of reviews — better |
| Number of ratings | 9 — better | — |
| Update frequency | Every 6 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #136 — better | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.6 — better | 17.6 |
| Further details — not scored | ||
| Size | 3 MB | 22 MB |
| Age rating | 17+ | 17+ |
| Developer | ANZCA | Anaesthesia Cognitive Aids and Research Group Incorporated |
Customer experience
Opioid Calculator
ASCAR
In-app purchases
Opioid Calculator
No in-app purchases
ASCAR
No in-app purchases
Questions
Is Opioid Calculator free?
Is ASCAR free?
Do Opioid Calculator or ASCAR have ads?
Which is updated more often, Opioid Calculator or ASCAR?
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