I've tried loads of leggings lately. Mostly looking for a replacement for some winter leggings from Aldi of all places...
Sweaty Betty Power High Waisted: no drawstring, thigh pockets only. Stay up well with phone in pockets, excellent inner thigh durability. Slightly less staying power after a whole days wear before running...
Sweaty Betty Power. Has loop drawstring, single thigh pocket. As above but even better staying power.
Sweaty Betty Zero Gravity. Fine for warmer weather running, not squat proof, same pockets as normal powers, has drawstring. Stays up well.
Tikiboo:. Big back pocket, stays up well, good drawstring
Gymshark Training. No drawstring or pockets, not good at staying up.
Gymshark Speed. Drawstring, back pocket too small for my phone, dubious about inner thigh durability. Stay up well, quite flattering.
Aurique (Amazon). Loop drawstring, stay up pretty well with 2 thigh pockets but questionable inner thigh durability.
Sweaty Betty are easily the best for staying up and the thigh pockets are great if I'm likely to need access to my phone. I'm a curvy 12/14 with chunky thighs being size determining, either small or medium in all these brands.