Good App but eats the battery of my iphone 5S

Its a good app working very well on my Iphone5S and also my Ipad2
Only problem I am having is eats my phone battery so fast.
My battery was %100 and used this app to adjust some of the security cameras outside for 15-25 min so and used %40 of my battery and My battery is %60 now.

Needs improvement on this side.
I am using a lot of apps for different jobs and this one is the only one uses this much battery.

An happy samsung owner about Guarding Expert, v3.4.2