I'm always skeptical about these "battery saving apps" and how much battery they really save. You have to remember that the app itself has to run in the background to function properly and to send the right signals when to turn "this off" or "that on", and so on.
It is from my experience that I don't think these types of apps work. I've tried many and most notably Tasker and JuiceDefender, where I got less than impressive results from either. Maybe they do save battery, but it's at such a minimal loss that I barely noticed after running each app for 2 weeks.
To me there is really only one way to save battery, well 2; manually turn everything off yourself or use manufacturers' battery saver (such as on my s4). Manually turning things off means they're off and nothing else is monitoring them causing battery drain, even if it is just "sipping" the battery. Manufacturer battery savers, such as Power Mode on the s4, block off the top speeds of the processor (basically underclocking), change screen settings (white background turns to blue in browser), and I believe the last one is haptic feedback which gets turned off. These 3 things seem like minimal changes, but they play a huge factor in preserving battery life.
As for my personal habits, when I go to sleep I turn off wifi, data, auto anything, and more recently all the s4 features to conserve. I've noticed anywhere from 8%-15% battery life saved overnight vs when I leave them on. For myself, that's a significant difference and it's easy to do, for others it would be cumbersome. The only reason I don't completely turn off my phone is because I like to leave it on just in case of emergencies.
These battery saving apps for me, didn't show the results I expected, and maybe that's because I'm not as heavy of a user as I thought I was compared to others. I've heard great results from others among this board, but from my personal experience and for my use, they were ineffective and mostly interfered especially if I was using my phone late at night when things are supposed to be off. Try it out, it may work for you, if not, then I hope my tips helped.
Just my .02