# Opioids Dosage Conversion vs ASRA Coags

The clearest difference is review sentiment: Opioids Dosage Conversion at 78% against ASRA Coags's 10%. Opioids Dosage Conversion also leads on rating (4.3 vs 1.3) and monetization model (free vs subscription). ASRA Coags's advantage is ratings volume (407 vs 18) and iOS requirement (13.4 vs 15.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Opioids Dosage Conversion holds the better App Store score, 4.3 against 1.3. That said, the two scores are not equally well evidenced: ASRA Coags has 407 ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 78% of Opioids Dosage Conversion's written reviews are positive against 10% of ASRA Coags's.

Opioids Dosage Conversion ships an update every 4 months, ASRA Coags every 3 months. The most recent releases landed on September 17, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Opioids Dosage Conversion | ASRA Coags |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (18 ratings)](https://appshunter.io/ios/app/opioids-dosage-conversion/id382383903/reviews)** | [1.3 (407 ratings)](https://appshunter.io/ios/app/asra-coags/id858796572/reviews) |
| Number of ratings | 18 | **407** |
| Positive reviews | **77.8% of reviews** | 9.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | **Free** | Subscription |
| Size | 2 MB | 27 MB |
| Requires iOS | 15.6 | **13.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Chris Marcellino MD LLC](https://appshunter.io/developer/1161719220) | [American Society of Regional Anesthesia and Pain Medicine](https://appshunter.io/developer/858796575) |

## What reviewers say

### Opioids Dosage Conversion

[App page](https://appshunter.io/ios/app/opioids-dosage-conversion/id382383903)

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:** macOS Compatibility

**In-app purchases:** none


### ASRA Coags

[App page](https://appshunter.io/ios/app/asra-coags/id858796572)

This app provides quick access to anticoagulation guidelines for regional anesthesia and interventional pain procedures. It offers drug-specific summaries, recommendations based on procedure type, and detailed information on medication mechanisms and guideline documents.

**Highlights:** Anticoagulation guideline reference, Drug-specific summary information, Regional anesthesia guidelines, Interventional pain guidelines, Search by drug or procedure, Recommendations by block and intervention type

**Features:** Apple Wallet, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Opioids Dosage Conversion free?

Opioids Dosage Conversion is free to download, with no in-app purchases.

### Is ASRA Coags free?

ASRA Coags is free to download, with no in-app purchases.

### Which has better reviews, Opioids Dosage Conversion or ASRA Coags?

Opioids Dosage Conversion is rated higher. Opioids Dosage Conversion averages 4.3 out of 5 from 18 ratings, while ASRA Coags averages 1.3 from 407 ratings.

### Do Opioids Dosage Conversion or ASRA Coags have ads?

Neither Opioids Dosage Conversion nor ASRA Coags shows ads.

### Which is updated more often, Opioids Dosage Conversion or ASRA Coags?

Opioids Dosage Conversion ships an update every 4 months, and ASRA Coags every 3 months. Most recently, Opioids Dosage Conversion was updated on September 17, 2026 and ASRA Coags on September 21, 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.*