Heart rates can vary a lot from person to person. As a runner I did a lactate test recently, i can perform at hr 200 for an hour.

You gonna put your phone on the top of your shoes?

Always on

Do you have a passcode on your watch? If yes try to turn it off

Only 64gb? My ipad has more storage

Like i said, garmin is great for working out. To answer your question however: there’s a giant library of third party apps called the app store which can provide you a similar experience. Adding third party apps is not even a thing on a garmin

As a marathon runner i was recently looking to update my series 4 and had a hard time deciding between an AW ultra and a high end Garmin. Went with the AW ultra because garmin watches are actually more ‘dumb’watches. They have great workout and biometrics tracking but other than that they don’t do much “smart” things. The possible things you can do on an apple watch are endless and garmin is years, maybe decades lacking behind.

That band gonna be dirty in 3…2…1…

I’m on 13 too and i can’t see a single reason why one would upgrade to a base 15. Even my battery feels like its a new iphone