Have you tried the Apple Watch? I don't find it addictive at all. On the contrary, it's significantly reduced my phone use and nearly eliminated the need for taking my phone when going out if not for missing some essential functionality (e.g. Lyft/Uber, offline maps, an affordable cell plan).
How about with an LTE model? I’m thinking that with a pair of AirPods and an LTE Apple Watch, I may be able to leave the phone at home while still being able to text, make phone calls, get directions, and even order a taxi. Maybe even stream some music.