Finally it’s back! The much appreciated MHApp is finally back in the AppStore. Rewritten from ground up in Swift. A modern user interface.

And the best is: it is free of charge!

Please note: MHApp is not a substitute for medical advice. MHApp is intended for educational purposes only. The purpose of this app is to use it to train and teach yourself in management of malignant hyperthermia. It might serve as a valuable tool in simulated MH scenarios.

Do you know what to do in case of a malignant hyperthermia crisis?
Are you sure somebody will take a detailed protocol during your actions?

MHApp does both for you:
MHApp is like an interactive MH-emercency poster. Simulating an MH crisis and teaching the acute management will certainly be of great value in case of a real crisis.
MHApp will guide you through a simulated malignant hyperthermia (MH) crisis. The App includes treatment of acidosis, hyperkalemia and dosing of dantrolene or ryanodex
Every action and injected dantrolene doses are recorded in a log file, which can be exported.

The clinical grading score (CGS) estimates the probability of an MH episode. The result can be exported as PDF.

A section with information about MH, anesthesia for the known MH patients, preparation of anesthesia workstations, MH-mutations and more.

This app was developed by international experts in Malignant Hyperthermia:
Dr. Henry Rosenberg (President of MHAUS)
Prof. Thierry Girard (director of the Swiss MH unit)

MHApp is endorsed by the North American MH Group (, as well as by the European MH Group (

Programmed by
Thierry Girard, Girard Development GmbH

The application MHApp is not a substitute for medical advice. MHApp is intended for educational purposes only. While the data may be updated periodically, users should independently check medical literature and package inserts or other sources for the latest information.
Any and all liability arising directly or indirectly from the use of this application is hereby disclaimed. The information herein is provided "as is" and without any warranty expressed or implied. All direct, indirect, special, incidental, consequential or punitive damages arising from any use of this application or data contained herein is disclaimed and excluded.

What’s New

Version 2.3

New layout of Clinical Grading Score (CGS) view
Export of CGS data as PDF

Apps live from AppStore ratings, therefore MHApp asks for a rating (maximal 3 times a year)

Ratings and Reviews

4.2 out of 5
6 Ratings

6 Ratings

Tomzzzdoc ,

Used to treat case of MH

On Friday I had my first case of MH intraoperatively. This App was a lifesaver, literally. When I called the MH hotline, they informed me I had already done everything I needed to do to treat my patient. Strongly recommend you buy this app.

Mshukry 73 ,

What a great and sophisticated program

Excellent. It gives you a step by step diagnostic and treatment plan tailored for your patient. You can also directly call the hotline.
Great job.

Obccrn ,

Crashes constantly

Crashes in multiple parts of the app and won't store the MH phone number in settings.

App Privacy

The developer, Girard Development GmbH, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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