# Opioids Dosage Conversion vs MKSAP 19

The clearest difference is update cadence: MKSAP 19 at every 2 months against Opioids Dosage Conversion's every 4 months. MKSAP 19 also leads on iOS requirement (12.0 vs 15.6). On price, rating, review sentiment and ratings volume 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 4.1. Both are backed by a comparable volume of ratings — 18 and 37 respectively. Written reviews point the same way: 78% of Opioids Dosage Conversion's written reviews are positive against 71% of MKSAP 19's.

Opioids Dosage Conversion ships an update every 4 months, MKSAP 19 every 2 months. The most recent releases landed on September 17, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Opioids Dosage Conversion | MKSAP 19 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (18 ratings)](https://appshunter.io/ios/app/opioids-dosage-conversion/id382383903/reviews)** | [4.1 (37 ratings)](https://appshunter.io/ios/app/mksap-19/id1577787036/reviews) |
| Number of ratings | 18 | **37** |
| Positive reviews | **77.8% of reviews** | 70.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 2 MB | 423 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Chris Marcellino MD LLC](https://appshunter.io/developer/1161719220) | [American College of Physicians](https://appshunter.io/developer/371090673) |

## 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


### MKSAP 19

[App page](https://appshunter.io/ios/app/mksap-19/id1577787036)

This medical education app provides access to current information in internal medicine and subspecialties. It includes exam-like questions and patient-based clinical scenarios to help physicians assess and update their knowledge. Offline access to content is available for subscribers.

**Highlights:** Current internal medicine information, 1,200 exam-like multiple-choice questions, Patient-based clinical scenarios, Offline content access, Syncs with online version, Enhances learning with figures, charts, and tables

**Features:** 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 MKSAP 19 free?

MKSAP 19 is free to download, with no in-app purchases.

### Which has better reviews, Opioids Dosage Conversion or MKSAP 19?

Opioids Dosage Conversion is rated higher. Opioids Dosage Conversion averages 4.3 out of 5 from 18 ratings, while MKSAP 19 averages 4.1 from 37 ratings.

### Do Opioids Dosage Conversion or MKSAP 19 have ads?

Neither Opioids Dosage Conversion nor MKSAP 19 shows ads.

### Which is updated more often, Opioids Dosage Conversion or MKSAP 19?

Opioids Dosage Conversion ships an update every 4 months, and MKSAP 19 every 2 months. Most recently, Opioids Dosage Conversion was updated on September 17, 2026 and MKSAP 19 on September 14, 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.*