I changed my smartphone, what should I do?

You just have to download the iHealth MyVitals app on your new smartphone and sign in to your iHealth account.

All your previously synchronized data will be there and you can synchronize your new measurements.

*credit to Sylvian of iHealth Labs EU

https://helpcenter.ihealthlabs.eu/hc/en-gb/articles/214179265-iHealth-Track-KN-550BT-I-changed-my-smartphone-what-should-I-do-