HotDoc vs CAS Patient
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HotDoc
Easily book and manage appointments with a wide range of health professionals 24/7. Access on-demand care, view doctor availability, and receive appointment reminders. Take control of your and your family's health.
- Instant online booking
- On Demand Care (Quick Consults, Telehealth)
- View doctor availability
- Appointment reminders
- Reschedule appointments
- Search and filter providers
- Book for family members
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Using HotDoc, you can book and manage your appointments with health professionals anywhere, at any time: • Instantly book online with your GP, dentist, psychologist, dietitian and more • Access On Demand Care via Quick Consults and Telehealth • See the availability of doctors - pick a date and time that best works for you • Save your care team in one place to easily book future appointments Stay on top of your schedule: • View and receive reminders of your upcoming appointments • See your place in the queue once you arrive at the clinic or practice • Conveniently reschedule your appointment if plans change • Receive email notifications confirming your appointment Be in control of your and your family's health and wellbeing: • Book a range of appointments such as dental check ups, skin checks, vaccinations and more • Search and filter healthcare providers based on your needs such as by gender, opening hours, and bulk billing practices • Book appointments for children and family members ________________________ What patients say about using HotDoc Best app for booking doctor appointments. Found to be most reliable. Quick and easy to use as favourites saved, 3 clicks and an appointment is favourite. Really is a must have. Wouldn't be without. Thanks very much 5 stars! Great app. I use it all the time to book appointments. Quick & easy at any time. One of the best apps. Easy to use choose your doctor and the day. You can make an appointment any time you want. 5+. Thanks! ________________________ About HotDoc HotDoc is Australia’s leading Patient Engagement Platform, trusted by over 18,000 healthcare professionals and 6 million Australians to book and manage their health appointments. We value patients privacy and the security of patient data. We never on-sell any data and only share patient information directly with your selected clinic. Our core belief is that the best patient outcomes are achieved by maintaining the continuity of care with your trusted health practitioner.
CAS Patient
Access your medical images and reports anytime, anywhere. Share results with others and manage your account details. Request appointments and receive notifications about your health information.
- Access images and reports
- Share results
- Request appointments
- Update account details
- Manage notifications
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Accessing your images has never been easier with Castlereagh Imaging. Use our App any time of the day or night to: · access your images and reports (after your scan) · share your results with family, friends or medical professionals · Request an appointment · update your email and password · Manage notifications for your images and your reports How does it work? Already registered for the Castlereagh Imaging Patient Portal? Log in using your mobile phone number and password. If you haven’t registered, ask one of our team members at your next appointment for instructions on how. You will be asked for your mobile number and email address, including your authorisation to receive a text to register. You will then receive an SMS message containing a link to create your account. Once you have an account you can log in at any time to see your images and your reports. Your reports will be uploaded 14 days after we have authorised and sent the report to your referring doctor. It’s important for you to go back to your doctor to get your results, so we won’t send them until you’ve had time to make that appointment. Our doctors will always personally call your doctor if the scans show anything unexpected. You can also perform these functions on our website at patient.casimaging.com.au Support for our App is available at support@casimaging.com
Screenshots
Verdict
The clearest difference is review sentiment: HotDoc at 86% against CAS Patient's 0%. HotDoc also leads on update cadence (every 2 weeks vs every 4 months). CAS Patient's advantage is iOS requirement (9.1 vs 15.0). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
HotDoc ships an update every 2 weeks, CAS Patient every 4 months. Both last shipped on October 29, 2026.
| Parameter | HotDoc | CAS Patient |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (25 ratings) — better | — |
| Positive reviews | 85.5% of reviews — better | 0.0% of reviews |
| Number of ratings | 25 — better | — |
| Update frequency | Every 2 weeks — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 9.1 — better |
| Further details — not scored | ||
| Size | 19 MB | 92 MB |
| Age rating | 17+ | 17+ |
| Developer | HotDoc | Sonic Healthcare Limited |
Customer experience
HotDoc
CAS Patient
Bugs and requests
HotDoc
Reported bugs
4 issues- Appointments disappearing from the app
- Incorrect or missing appointment details
- Difficulties logging in and managing account
- Compatibility issues with older devices
Requested features
5 requests- Add option to favorite multiple doctors/clinics
- Improve notification system for appointment changes
- Allow more detailed notes/comments for appointments
- Integrate with more healthcare providers
- Provide better visibility into appointment queue/wait times
CAS Patient
Not enough reviews yet to summarise bugs or requests.
In-app purchases
HotDoc
No in-app purchases
CAS Patient
No in-app purchases








