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I would like to add this app as well:
Unaerobic Plus
it is a paid version, but the only freedive app that you can use with a heart rate band. I do love the combination to see how your heart reacts to your breath hold and even more important, to your breath up.
I got the app STAmina. Great looking interface, CO2, O2 and mixed tables, easy to use. I recommend it.
Greetings
Gesendet von meinem SM-G935F mit Tapatalk
StAmina is certainly my preferred choice after trying most of them.
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I remember discussing a 'history' function for the StAmina app where you can monitor your progress in a graph. I hope it will make it into a future upgrade.Yup, for me it is vital to monitor my progress. That is why I am sticking to Unaerobic for now. Make sure you also suggest the compatibility of cheaper BT heart rate sensors since not everyone is into buying a 60 euro heart rate chest strap.