Comparison

Opioid Calculator vs ASCAR

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

Head to head
About

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.

Highlights
  • Calculate oral Morphine Equivalent Daily Dose (oMEDD)
  • Simplify calculations for combined opioids
  • Facilitate clinical practice
  • Support medical education
  • Aid research
Features
Currently charting
Read full description

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.

About

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.

Highlights
  • Complete ASCAR library
  • Paediatric Dose Calculator
  • Offline access
  • Advanced search function
  • Automatically updated aids
Features
Read full description

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

Opioid Calculator4 screens
ASCAR4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 7 level
Opioid Calculator versus ASCAR: the parameters behind the verdict, then further details
ParameterOpioid CalculatorASCAR
Price$0.99Free — better
Rating3.7 (9 ratings) — better—
Positive reviews81.3% of reviews87.5% of reviews — better
Number of ratings9 — better—
Update frequencyEvery 6 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#136 — better—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.6 — better17.6
Further details — not scored
Size3 MB22 MB
Age rating17+17+
DeveloperANZCAAnaesthesia Cognitive Aids and Research Group Incorporated

Customer experience

Opioid Calculator

All ratings9 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews16 reviews
Positive81.3%
Neutral0.0%
Negative18.8%

ASCAR

Written reviews8 reviews
Positive87.5%
Neutral0.0%
Negative12.5%

In-app purchases

None

Opioid Calculator

No in-app purchases

None

ASCAR

No in-app purchases

Questions

Is Opioid Calculator free?
Opioid Calculator costs $0.99, with no in-app purchases.
Is ASCAR free?
ASCAR is free to download, with no in-app purchases.
Do Opioid Calculator or ASCAR have ads?
Neither Opioid Calculator nor ASCAR shows ads.
Which is updated more often, Opioid Calculator or ASCAR?
Opioid Calculator ships an update every 6 months, and ASCAR every 2 months. Most recently, Opioid Calculator was updated on November 11, 2026 and ASCAR on November 3, 2026.

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