As has been explained in another thread in this forum, the HRV stress score feature of the mobile app is reserved for the latest Fenix 5 series only. Whether it will come to older devices as a firmware update is doubtful.
I don't find it informative/meaningful.You're entitled to that personal opinion.
Is it because it's meaningless on the 3 series ?You tell me. Nobody – including Garmin – has to consult with you to divine what you would find meaningful (or, indeed, what constitutes ‘meaning’ to you in the first place). If you don't find the app or the information it presents to be of value, then don't use it; the use of the app is entirely voluntary and optional.
If this is the case, why in the hell is the app showing on the 3 series ?It's installed by default, but if you somehow find its presence to be an affront, I'm sure you can (and the onus is on you to) take action to remove that Connect‑IQ app.
Can you briefly describe the steps to do this? Thanks
OK: I will just continue tracking HRV in SportTracks mobi then - I have activated HRV in the .FIT files on my 735XT :-)