ECG Ruler is a must app for any cardiologist.
An easy-to-use tool to measure intervals on a standard ECG. Take a picture of the ECG, zoom it in and measure heart rate and intervals such as PR, QRS, QT or QTc with millisecond precision with the built-in calipers, in a single step.
Credits:
Idea by Axel Sarrias.
Developed by Bernat Ripoll.