I might deep six TIDAL. Find myself preferring Spotify for mobile and can get reliable 16/44.1 FLAC in browser from Qobuz on the desktop. You guys would love Qobuz, has a shit ton of jazz and classical.
It is apparently very accurate. I saw a post on a running forum this morning where a guy took his Apple Watch and Garmin + chest strap out for a 10K. The distance covered showed exactly the same on both devices and the average heart rate only differed by 1 beat per minute.