It is just prank app built for entertainment purpose only, just start the application and press the chainsaw screen, electric chainsaw sound will play, bring the phone screen near an object, the chainsaw sound will chain as if it is cutting an object.

Electric chainsaw is a prank application with you feel as if you hold the real electric chainsaw in your hand.
Tap the screen to turn on the chainsaw, bring your phone close to anything with the device screen facing towards thing, when it is very close, you will notice that sound is changed as if chainsaw is cutting the thing.
Electric chainsaw is the best application to make joke and entertain your friends that will amaze to see that phone is given an illusion of real electric chainsaw.

Note: It is just prank application that play electric chainsaw sound, it has nothing to do with real chainsaw and it does not harm anyone