@Tutanota your competitor Proton is also a good alternative. Punkt is the best alternative to iOS and degoogled android. Incidentally Punkt also supports Proton by default.

What the EU needs is an equivalent to Apple Health / Google Fit, which integrates with Oura, Polar, Suunto, Withings, Yazio, Awareapp etc. etc.

Can they all cooperate to form this cloud data storage, protected by EU privacy, supported by subscription?