I have never used an apple device, and wouldn't dream of turning on a pointless 120Hz display if my device had it.
Those exist purely for bragging rights. The human eye/brain is not capable of distinguishing that level of movement.
I have found that every device I have used, clash is one of the biggest users of power of the apps I have used.
I can go out for a 2 hour bike ride with wahoo on my phone using GPS to display speed and map, and bluetooth to connect to and display values from heart rate and cadence monitors, and will still have 65% battery left. I did exactly that on Saturday. If I play Clash constantly for 2 hours without plugging in to a charger, it will be below 50%.
Thanks TerMinus Prime for the sig pic
I do like to keep it nice an bright, true. But that is the case for all apps - except when I'm riding the bike after dark, when I'll drop it down to a level it doesn't interfere with my night vision.
It doesn't actually tell me the percentage, but looking at the slider bar, it is about 75%
Thanks TerMinus Prime for the sig pic
3-4h on any device is about par for course (I probably get 5-6h on some of my tablets). The issue with CoC is the regular pings back to home to carry state and other updates. Most mobile devices will move the 4G or Wifi to low power within a second or two of no activity. Continuous activity, e.g. every few seconds is like stop/start/accelerating a car, rather than a smooth constant velocity.
So, yes any device will get hot.