Update: Got it back to working... Key for me was NOT to have the H7 as a Bluetooth device (My devices in iPhone settings). For some reason iThlete now can always pick up the H7 when I have deliberately not paired it with my phone.
Previous review: Was somehow able to measure my HRV for first two days - then for last two days ithlete does not pick up my Polar H7 whatever I do (uninstall/reinstall, wet, clean, conduction gel). Other HRV apps read HR fine. Frustrating!
coldfact about ithlete Train.Recover.Perform, v3.1