When I considered either GG or Arccos, the aspect that actually won it for Arccos was the lack of having to 'tap' your club. In terms of forgetfulness, I've actually left my wireless speaker in the golf cart after the round...while it was still playing music! So knowing myself, I knew I'd always be beating myself up.
I've been a religious Arccos user for two years. Couple of feedback points:
1) I never notice the phone in my pocket, but I have a regular sized iPhone 7.
2) I do love the data, but feel they've been lax in really helping you to manipulate/massage it via the interface