AnSo vs Opioid Conversion Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AnSo
This app helps anesthesiologists quickly identify sonoanatomy for various procedures. It offers detailed images, landmark sketches, and innervation data for nerve blocks, along with tips from experienced clinicians. It covers regional anesthesia and other perioperative ultrasound uses.
- Sonoanatomy identification
- Landmark sketches
- Nerve block innervation
- Ergonomic positioning guides
- Perioperative ultrasound uses
- Clinical tips and notes
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AnSo is a convenient resource designed to help anaesthetists identify common sonoanatomy, in a time efficient manner, within the busy operating theatre. It has been created by practicing anaesthetists with an interest in teaching ultrasound and regional anaesthesia. Please note that a subscription is required to access all content for this app. You can purchase a monthly or yearly subscription after signing in. AnSo: - provides multiple examples of the sonoanatomy as every individual is different, - provides landmark sketches useful for developing pattern recognition of landmark structures, and for trainees to draw in exams, - displays the cutaneous, motor, osseous and visceral innervation of the numerous nerve blocks and fascial plane blocks now available, facilitating appropriate block choice and knowledge of expected results, - allows combining and comparing block innervation, - allows images to be flipped to display both L and R sided orientation, - demonstrates functional ergonomics with patient, ultrasound screen and proceduralist positioning essential for efficient practical performance, - provides block notes with sonoanatomy tips and practical tips from experienced clinicians which can be invaluable to the learner. AnSo is not only for regional anaesthesia but includes many other perioperative uses of ultrasound relevant to the anaesthetist, such as: - airway - gastric antrum - vascular access - spine - transthoracic echo - lung signs AnSo contains: - over 250 ultrasound images with over 1500 sonoanatomy colour overlays, - innervation images, - ergonomic images, - landmarks pattern sketches, - loops when required for dynamic sonoanatomy, - notes with tips from experienced clinicians. AnSo helps identify not only the target structures but all the surrounding sonoanatomy. This more comprehensive understanding of the sonoanatomy helps detect anatomical variability, improves the safety and efficacy of procedures, and facilitates learning and teaching. AnSo has been designed in a format that can be easily updated and distributed to users so the information can be kept as current as possible in this rapidly expanding field. AnSo does not require an internet connection to run. Once downloaded all data is stored on your device so it will work anywhere and images will display without any delay. It can be useful both in and out of theatre, when performing procedures, and when learning or teaching ultrasound. There is no advertising in the app making it pleasant and time efficient to use. Terms of use can be found at https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Download AnSo today and always have access to this sonoanatomy and nerve block resource.
Opioid Conversion Calculator
This medical app simplifies complex opioid conversion tasks for healthcare professionals. It offers extensive drug coverage, a visual safety indicator for dosages, and breakthrough dosing calculations. Available in multiple languages, it ensures accurate and safe pain management.
- Extensive drug coverage
- Visual safety indicator
- Breakthrough dosing calculations
- Formulation conversions
- Up-to-date pharmaceutical formulary
- Multilingual support
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Opioid Conversion Calculator is built for health professionals who need a clear, efficient way to compare opioid doses and review the clinical context behind a conversion. CALCULATE AND COMPARE - Calculate total oral morphine equivalent (OME) across multiple opioids and routes. - Review calculated target doses after applying a chosen Target OME percentage. - View conservative, rounded-down target and breakthrough dose suggestions. - Move quickly between the calculation, individual results and supporting information. REVIEW CLINICAL INFORMATION - Read practical points alongside formulation-specific pharmacology. - Switch between supported formulations without leaving the result. - Follow links to the supporting references. - View official products and strengths for supported clinical regions, independently from the app language. TAILOR THE WORKFLOW - Edit conversion factors and choose which opioids appear with Pro. - Export and import settings when moving between devices. - Use the app in English, French, German, Italian, Portuguese (Brazil) or Spanish. PRO ACCESS The core calculation remains available without creating an account. Pro adds professional detail and customisation. Available plans, prices and any introductory offer are shown using the information supplied by the App Store before purchase. Purchases and subscriptions can be restored in the app. CLINICAL USE Equianalgesic conversions are estimates and do not replace clinical judgement. Consider incomplete cross-tolerance, patient factors, formulation, route, local guidance and monitoring when interpreting a result. Review the references and terms of use before using the calculator in clinical practice. Privacy policy: https://opioidconversioncalculator.com/privacy Terms of use: https://opioidconversioncalculator.com/terms
Screenshots
Verdict
The clearest difference is monetization model: Opioid Conversion Calculator at free with in-app purchases against AnSo's subscription. Opioid Conversion Calculator also leads on rating (3.7 vs 3.5). AnSo's advantage is update cadence (fortnightly vs every 2 months) and chart position (#81 vs unranked). On price, review sentiment, ratings volume 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
Both are free to download. AnSo sells 4 in-app purchases, starting at $0.49 per month and Opioid Conversion Calculator sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
Opioid Conversion Calculator holds the better App Store score, 3.7 against 3.5. Both are backed by a comparable volume of ratings — 30 and 17 respectively. Written reviews complicate that: 39% of AnSo's written reviews are positive against 38% of Opioid Conversion Calculator's, so the app with the better star average is not the one people write more warmly about.
AnSo ships an update fortnightly, Opioid Conversion Calculator every 2 months. The most recent releases landed on September 23, 2026 and September 22, 2026 respectively.
| Parameter | AnSo | Opioid Conversion Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (30 ratings) | 3.7 (17 ratings) — better |
| Positive reviews | 39.1% of reviews — better | 37.5% of reviews |
| Number of ratings | 30 — better | 17 |
| Update frequency | Fortnightly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | Free with in-app purchases — better |
| Best chart rank | #81 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 72 MB | 88 MB |
| Age rating | 17+ | 17+ |
| Developer | Sumo Enterprises Pty Ltd | Ayrial Beall |
Customer experience
AnSo
Opioid Conversion Calculator
In-app purchases
AnSo
- AnSo one month subscription14 Days trial$0.491 Month
- AnSo Pro one year subscription1 Month trial$5.991 Year
- AnSo Pro subscription1 Year trial$5.991 Year
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- AnSo one year subscription14 Days trial$5.991 Year
Opioid Conversion Calculator
- Monthly Pro Access$3.991 Month
- Pro Access$19.991 Year
- Lifetime Pro Access$79.99
Questions
Is AnSo free?
Is Opioid Conversion Calculator free?
Which has better reviews, AnSo or Opioid Conversion Calculator?
Do AnSo or Opioid Conversion Calculator have ads?
Which is updated more often, AnSo or Opioid Conversion Calculator?
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