I tried everything under the sun including the grayscale trick, and at the end of the day there were three things that worked. Putting the phone on silent, putting it out of sight, and simply turning it off.
This resulted in 5 hours of phone time per day declining to 1 (it's my companion at the gym plus during most meals and that's OK).
Everyone's approach is going to be a little different depending on the rhythm of their life. For me the phone usually stays turned off for most of the morning now. It's in a drawer for most of the afternoon/evening. If I'm out and about it's in my pocket or bag on silent. It briefly gets unmuted at times when I'm expecting a delivery, appointment etc. and that's about it. The bar is high because the peace of mind is too great to lose.
This resulted in 5 hours of phone time per day declining to 1 (it's my companion at the gym plus during most meals and that's OK).
Everyone's approach is going to be a little different depending on the rhythm of their life. For me the phone usually stays turned off for most of the morning now. It's in a drawer for most of the afternoon/evening. If I'm out and about it's in my pocket or bag on silent. It briefly gets unmuted at times when I'm expecting a delivery, appointment etc. and that's about it. The bar is high because the peace of mind is too great to lose.