# Opioid Calculator vs Somnus

The clearest difference is price: Somnus at Free against Opioid Calculator's $0.99. Somnus also leads on rating (4.5 vs 3.7) and update cadence (every 4 days vs every 6 months). Opioid Calculator's advantage is in-app purchases (none vs 3) and chart position (#131 vs unranked). On review sentiment and ads there is nothing between them.

Somnus is free to download; Opioid Calculator costs $0.99 up front. Somnus sells 3 in-app purchases, starting at $19.99 per year. Opioid Calculator asks for nothing beyond the download.

Somnus holds the better App Store score, 4.5 against 3.7. Both are backed by a comparable volume of ratings — 9 and 28 respectively. Written reviews point the same way: 81% of Opioid Calculator's written reviews are positive against 89% of Somnus's.

Opioid Calculator ships an update every 6 months, Somnus every 4 days. Both last shipped on November 6, 2026.

## The numbers

| Metric | Opioid Calculator | Somnus |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.7 (9 ratings)](https://appshunter.io/ios/app/opioid-calculator/id1039219870/reviews) | **[4.5 (28 ratings)](https://appshunter.io/ios/app/somnus/id1360604259/reviews)** |
| Number of ratings | 9 | **28** |
| Positive reviews | 81.3% of reviews | **88.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#131** | — |
| Size | 3 MB | 138 MB |
| Requires iOS | **16.6** | 18.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac, Apple Watch, Vision Pro** |
| Age rating | 17+ | 17+ |
| Developer | [ANZCA](https://appshunter.io/developer/1039219869) | [Somnus Health Pty Ltd](https://appshunter.io/developer/1104893009) |

## What reviewers say

### Opioid Calculator

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

**Currently charting:** #131 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


### Somnus

[App page](https://appshunter.io/ios/app/somnus/id1360604259)

Log anesthesia, surgical, and critical care cases and procedures efficiently. Securely sync data with iCloud, encrypt it locally, and utilize powerful search and export features. Customize entries, add notes, and scan patient IDs for streamlined record-keeping.

**Highlights:** Case and procedure logging, Secure iCloud syncing, Local data encryption, Customizable categories and items, Patient ID scanning, Clinical photo integration, Data export (PDF, CSV)

**Features:** Family Sharing, Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Subscription | $19.99 | per year |
| Yearly Subscription PRO | $99.99 | per year |
| Shout Paul A Coffee? | $3.99 | one-time |


## Frequently asked questions

### Is Opioid Calculator free?

Opioid Calculator costs $0.99, with no in-app purchases.

### Is Somnus free?

Somnus is free to download, with in-app purchases available.

### Which has better reviews, Opioid Calculator or Somnus?

Somnus is rated higher. Opioid Calculator averages 3.7 out of 5 from 9 ratings, while Somnus averages 4.5 from 28 ratings.

### Do Opioid Calculator or Somnus have ads?

Neither Opioid Calculator nor Somnus shows ads.

### Which is updated more often, Opioid Calculator or Somnus?

Opioid Calculator ships an update every 6 months, and Somnus every 4 days. Most recently, Opioid Calculator was updated on November 6, 2026 and Somnus on November 6, 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.*