My phone is the Evo 3d. It is very well known for having an epically bad battery life. Literally the phone can go from full charge to dead in 3 hours with just msn, yahoo, and steam background if enough people are active. Ego app, while as miniscule of drain as that would be, will only take away from my already horrid battery life.
I literally carry 2 extra batteries with me everywhere I go to get through the day on my demanding days with my job.
Other than that I would be all over it. But alas until I get the next generation of droid, I will be doing without the ego app.