Why is battery performance low on iPhone?

hamdi ~ 88% maximum capacity is good.

Did you buy the iPhone new or used?

How many years have you owned the iPhone?

õ¿õ¬

hamdi ~ Does your iPhone 8 Plus still have its original battery?

And what's the Maximum Capacity % here?...

Settings > Battery > Battery Health

õ¿õ¬

hamdi ~ Go here: Settings > Battery

...and scroll down to BATTERY USAGE BY APP.

What are the first three apps in the list and their % use?

õ¿õ¬