# Opioid Calculator vs ASCAR

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 (#164 vs unranked). On review sentiment, ads, in-app purchases and device support there is nothing between them.

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.

## The numbers

| Metric | Opioid Calculator | ASCAR |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[3.7 (9 ratings)](https://appshunter.io/ios/app/opioid-calculator/id1039219870/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 81.3% of reviews | **87.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Best chart rank | **#164** | — |
| Size | 3 MB | 22 MB |
| Requires iOS | **16.6** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [ANZCA](https://appshunter.io/developer/1039219869) | [Anaesthesia Cognitive Aids and Research Group Incorporated](https://appshunter.io/developer/1609670504) |

## What reviewers say

### Opioid Calculator

[App page](https://appshunter.io/ios/app/opioid-calculator/id1039219870)

**Currently charting:** #164 Top Paid · Medical (US App Store)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### ASCAR

[App page](https://appshunter.io/ios/app/ascar/id1600414369)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*