Modern human uses a mobile device a lot of time every day. Average usage time is more than 2 hours per day. Most part of time user checks social network, like Instagram and Facebook, reads different information and visits entertainment sites, plays games etc. Proportionally with this user spends more money.
All it increases competition between developers of mobile applications. Besides good functionality and content, the user will evaluate your application performance level - memory and battery usage, freezing when working with the application, etc.
I will tell you about that and not only during my talk. Namely, I will tell how you can check the CPU loading level, memory and energy usage levels by your application.
As usual, a lot of examples from real life.