ASCAR vs Zentobox
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
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 β 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 forβ¦ 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: β’ Complete ASCAR library: automatically updated suite of cognitive aids from the ASCAR group across the whole array of anaesthetic sub-specialties. β’ Paediatric Dose Calculator: Proprietary paediatric anaesthesia calculator to assist you with looking after our most vulnerable patients. β’ Offline access: all files and our calculator remain accessible β even offline. But any updates will require an internet connection. β’ 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.
Zentobox
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Zentobox provides outsourced practice management services that improve your productivity, increase the profitability of your practice, and allow your business to function at peak efficiency. Our professional management team and specially designed technology can expertly manage the pain of your private practice and let you focus on your work again. This app is currently designed for our anaesthetists. It enables you to take a photo of a sticker, record anaesthetic item numbers according to the specialty of the surgeon and automatically suggests the start time and finish time of the case. After you have captured all of the stickers for the patients in a list and recorded item numbers and times through your session, submitting everything to us for processing is easy: just hit submit and a pdf is sent to both you and us so we can generate accounts for your review. When you take a photo of the sticker, the app will automatically crop the image for you so that any adjacent stickers or other information on the page is excluded from the pdf generated after the list. We will continue to add functionality and features to this app over time. Donβt forget to keep it up to date.
Screenshots
Verdict
The clearest difference is update cadence: Zentobox at every 2 weeks against ASCAR's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ASCAR ships an update every 2 months, Zentobox every 2 weeks. The most recent releases landed on November 3, 2026 and October 24, 2026 respectively.
| Parameter | ASCAR | Zentobox |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 87.5% of reviews | β |
| Update frequency | Every 2 months | Every 2 weeks β better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | β |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 16.0 β better |
| Further details β not scored | ||
| Size | 22 MB | 68 MB |
| Age rating | 17+ | 17+ |
| Developer | Anaesthesia Cognitive Aids and Research Group Incorporated | Zento Group |
In-app purchases
ASCAR
No in-app purchases
Zentobox
No in-app purchases






