Somnus vs ASCAR
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Case and procedure logging
- Secure iCloud syncing
- Local data encryption
- Customizable categories and items
- Patient ID scanning
- Clinical photo integration
- Data export (PDF, CSV)
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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 • 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/
ASCAR
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.
- Complete ASCAR library
- Paediatric Dose Calculator
- Offline access
- Advanced search function
- Automatically updated aids
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Integrate cognitive aids into your anaesthetic practice today! The ASCAR app has been designed by clinicians for clinicians with the aim of supporting Operating Theatre (OT) teams to plan and brief for complex cases effectively as well as respond appropriately to crises. The app allows you to carry in your pocket, the ever expanding library of ASCAR cognitive aids – so they are available in their most up-to-date version on your device whenever and wherever you are. Just select the subspecialty to locate the cognitive aid you are looking for… or, alternatively, use our advanced search function. The next time you find yourself in an OT full of responding staff, why not contribute by opening the app to assist the team in focusing on the clinical priorities and avoiding blindspots. Features: • Complete ASCAR library: automatically updated suite of cognitive aids from the ASCAR group across the whole array of anaesthetic sub-specialties. • Paediatric Dose Calculator: Proprietary paediatric anaesthesia calculator to assist you with looking after our most vulnerable patients. • Offline access: all files and our calculator remain accessible – even offline. But any updates will require an internet connection. • Advanced search function: to minimise the time and facilitate the ergonomics of finding the aid that you need at that moment of crisis. About us: ASCAR stands for AnaeSthesia Cognitive Aids and Research. We are a not-for-profit Human Factors interest group that was conceived at the Anaesthetic Department, at the Royal North Shore Hospital in Sydney. Our mission is to support our colleagues to perform excellently during crises, by researching, designing, and testing cognitive aids that are optimised for our high stakes environment. Through an understanding of strong aesthetic design, team dynamics, and ergonomics our goal is to advance the creation of clinical support tools for anaesthetists worldwide.
Screenshots
Verdict
The clearest difference is in-app purchases: ASCAR at none against Somnus's 3. Somnus's advantage is update cadence (every 4 days vs every 2 months) and device support (5 vs 2). On price, review sentiment, ads and iOS requirement 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
Both are free to download. Somnus sells 3 in-app purchases, starting at $19.99 per year. ASCAR asks for nothing beyond the download.
Somnus ships an update every 4 days, ASCAR every 2 months. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.
| Parameter | Somnus | ASCAR |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (27 ratings) — better | — |
| Positive reviews | 88.9% of reviews — better | 87.5% of reviews |
| Number of ratings | 27 — better | — |
| Update frequency | Every 4 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, Mac, Apple Watch, Vision Pro — better | iPhone, iPad |
| Requires iOS | 18.6 | 17.6 — better |
| Further details — not scored | ||
| Size | 137 MB | 22 MB |
| Age rating | 17+ | 17+ |
| Developer | Somnus Health Pty Ltd | Anaesthesia Cognitive Aids and Research Group Incorporated |
Customer experience
Somnus
ASCAR
In-app purchases
Somnus
- Yearly Subscription2 Months trial$19.991 Year
- Yearly Subscription PRO2 Months trial$99.991 Year
- Shout Paul A Coffee?$3.99
ASCAR
No in-app purchases







