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Use electronic calipers to make measurements on images of ECGs or EP recordings
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EP Calipers

EP Calipers

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EP Calipers is an Apple iOS application that provides electronic calipers for making measurements on images of ECGs or other recordings. Calculations such as mean heart rate and corrected QT intervals can be performed directly in the app.

EP Calipers for iOS is open source, and licensed under the Apache License, Version 2.0. When used with Apple devices via the iTunes App Store, it is subject to the standard Apple iOS license agreement.


Copyright © 2015-2018 EP Studios, Inc.


Thanks to Dr. Michael Katz for the concept.

The Brugadometer is based on the work of Dr. Adrian Baranchuk and his colleagues at Queen's University Kingston, Ontario, Canada. It is used with Dr. Baranchuk's permission and encouragement. Please see this article for more information.

The ios-color-picker widget used in this app is Copyright © 2015 by Fabian Canas. Its license is the MIT license which is compatible with the Apache License, Version 2.0.

The tooltips were implemented using the CMPopTipView framework of Chris Miles. This framework is Copyright © 2015 by Chris Miles and is used under the MIT License.

Many icons in this app were downloaded as free icons from Icons8. They are used under the Creative Commons Attribution-NoDerivs 3.0 Unported license or WTFPL. For more information,see this site. Other icons used were obtained from graphicpear. Their terms of usage are here.

Right and left arrow icons were made by Dave Gandy at and used under the Creative Commons BY 3.0 license. The lightning bolt icon was made by srip at and used under the Creative Commons BY 3.0 license.

French translation by David Mann, Gretchen Mann, Juliet Mann and Jean-Claude Hounou. Also thanks to Dr. Pierre Taboulet for confirming to me that a cardiologist's caliper is a "Compas" and not an "Étrier!"

Thanks to Victoria Churilina for the Russian translation.

Thanks to Scott Krankkala for the idea behind marching calipers.


David Mann


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