Five star!
Been using the iPhone app for some years and it is very clear, customisable and improves one’s practice. I’m not a free diver, I surf occasionally but feel the O2 and CO2 practices are beneficial for overall wellbeing. The addition of this watch app is fantastic. It means one can practice with the standalone app (the history helpfully syncs with phone app though). By using the haptic clues rather than voices prompts one can practice at any time, whilst standing in a queue or work meetings! Without anyone knowing… apart from your blue face 😝. The team are great at communicating and interacting with tweaks to interface or UX. Great work.
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