Apple has am easier life ensuring compatibility and performance. Even with that you can see a phone getting slower over multiple iterations of ios. As far as b

Apple has am easier life ensuring compatibility and performance. Even with that you can see a phone getting slower over multiple iterations of ios. As far as battery drain: i believe the usage pattern and how much time you invest in configuring your phone go a long way (did it for android, did it for ios. For example: background app refresh? Nope. Gps while not using the app? Nope. Look at battery usage over the day and see what kills your battery)