The app seemed to work well in backing up my call logs and SMS's to my Gmail account. However after I installed it the phone became very buggy  would freeze at different points and I wasn't able to place any calls so I uninstalled in a panic after which the phone resumed normal function. Alcatel One Touch S'Pop 4030X w/Andrioid Jelly Bean. May try again at some point though.
June 25 2015