Comparison

Opioid Calculator vs Somnus

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

Somnus

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
Read full description

Somnus is the fast, private, beautifully designed case logbook for anaesthetists, surgeons and critical care clinicians. Log a case in seconds. Search and analyse years of practice in moments. Everything stays encrypted on your devices - never on someone else's server. Your data is never held hostage behind a paywall: viewing, searching and exporting what you already have is always free. Choose Basic for everything needed to log and analyse cases, or Pro to add on-device AI features. One subscription unlocks iPhone, iPad, Mac and Apple Vision Pro. • Somnus Pro: On-Device AI • Every Pro feature runs on-device using Apple Intelligence (with the option to use Apple's Private Cloud Compute) • Theatre List Import - scan, photograph, paste or import a list; Somnus matches patients and operations to your data and turns it into bookable cases in one tap • Smart Suggestions - quick-add bubbles that learn from your cases (medications for certain comorbidities, equipment for operations, common combinations) • Label Analysis AI - Pro label scanning also extracts health fund, insurance number and optional contact details • Typo-tolerant "Did you mean?" search across all screens • Practice efficiency widgets - live utilisation chart, and year-over-year monthly comparison filterable by specialty, location or surgeon • Send to CESoft (Australia only) - fast billing handoff with extracted contact details • Your Data on Your Device • Works fully offline • Generic patients, or a relational patient database for deeper analysis • Smart validation catches inconsistencies (ASA 1 with comorbidities, extreme BMIs, more) • Encrypted on device, protected by Face ID, Touch ID or a fallback PIN • Rename an item once and it updates everywhere instantly • Fully Customisable • Edit, merge, rename, delete or create any category item • Rich text notes with tappable links on almost anything • Personal Lists for your own categories and items • Multiple Custom Timers per case (e.g. tourniquet time) • Templates so starting a new case is two taps away • Searches to slice and analyse your data in sophisticated ways • Private, Secure iCloud Sync • No new accounts - just your existing iCloud • Apple's infrastructure only; nothing visible to anyone but you • Turn it off any time and use devices independently • Syncs Templates, Searches, Photos, ID Labels and most Settings • ID Label (Bradma) & Document Scanning • The fastest way to add a patient - just scan the label • All analysis on-device, including Medicare validation (Australia) • Re-scan returning patients to update their previous cases • Scan document text straight into case notes • Clinical Photos • Capture high-resolution photos in Somnus, with full Photo Library import/export • Included in Case Reports (PDF) • Export • Case, Billing (built-in RVG, Australia), Summary and Theatre List PDFs • Summary or full spreadsheet as CSV • Data file to share with another Somnus user • Import • Somnus Data files, Backups or CSV • Pre-populate upcoming lists from CSV so booked cases start with one tap • Create complex Personal Lists and import via CSV • Siri & Spotlight • Siri Shortcuts for powerful workflows • Private on-device Spotlight indexing for cases & patients • Widgets & Live Activities • Track upcoming & active cases on home and lock screens • Configurable Day Case List - today, or the next day with cases • Pro: live utilisation chart and year-over-year monthly comparison • Privacy protected when the device is locked • And much more • Beautiful, interactive charts • Multi-window with local drag & drop and into other apps • Real-time case timers and theatre utilisation summaries • Tappable phone numbers, emails, dates and addresses in notes Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Opioid Calculator4 screens
Somnus4 screens

Verdict

The call

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 (#124 vs unranked). On review sentiment and ads 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

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard9 real differences · 2 level
Opioid Calculator versus Somnus: the parameters behind the verdict, then further details
ParameterOpioid CalculatorSomnus
Price$0.99Free — better
Rating3.7 (9 ratings)4.5 (28 ratings) — better
Positive reviews81.3% of reviews88.9% of reviews — better
Number of ratings928 — better
Update frequencyEvery 6 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#124 — better—
DevicesiPhone, iPadiPhone, iPad, Mac, Apple Watch, Vision Pro — better
Requires iOS16.6 — better18.6
Further details — not scored
Size3 MB138 MB
Age rating17+17+
DeveloperANZCASomnus Health Pty Ltd

Customer experience

Opioid Calculator

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

Somnus

All ratings28 ratings
Positive89.3%
Neutral0.0%
Negative10.7%
Written reviews27 reviews
Positive88.9%
Neutral0.0%
Negative11.1%

In-app purchases

None

Opioid Calculator

No in-app purchases

3 purchases

Somnus

Subscriptions2
  • Yearly Subscription2 Months trial$19.991 Year
  • Yearly Subscription PRO2 Months trial$99.991 Year
One-time1
  • Shout Paul A Coffee?$3.99

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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