Simple Yet Effective App is great but needs polishing. Some of the articles link to dead links. Still one of the best on the market.Would like to see a calendar for training and a method to log other Freediving training.
Lagging audio The audio is lagging and sometimes skip or is delayed for countdown.
Unnecessary LED on for H+R monitor Galaxy S7 Edge LED on for H+R monitor sensor
no cam light for heartbeat monitor my camera light did not turn on for the heart beat monitor.
Great Heart Rate sensor support Finally an apnea app that adds best of both worlds. My Cheap China Coospo Hear rate BT smart sensor works fine. Need to pair one time manually in Android and then it is found by the app. Only thing, in the overview I can't see when pressed for a contraction. Other than that, great app!
Good but not great Upon further testing with a galaxy s4. I have found that the heart rate data is recorded with the finger method, an ANT+ heart rate monitor, and a Polar heart rate monitor; however when reviewing the collected data in the graphs both the heart rate monitors only display the initial point at zero bpm and no more points. The good news is that the finger method records perfectly. Scrolling around and manipulating the graphs is difficult and hard on the s4. Will test on s3 and s2 as well. Don't have a zephyr. As of 26 Apr 2015 the Ant+ heart rate monitor is working great. Moving side to side in the graphs work well however when zooming in you cannot move up and down. Bumped up to 4 stars.