I really do find it hard to believe no one has posted a review on this app already. I have only had it for a little while but it great. I have a Sprint HTC hero and i try to save as much battery as possible. I keep the bluetooth off, i keep the wifi off, and i keep the screen dim. Just like the app states it allows you to toggle the wifi while you are in another application. I don't know how many times i have been at work or at home and start surfing the internet to find that i should have switched to wifi. i have to home button out. slide over two screens to my widget and then toggle it on just to slide back over and access my internet. NO MORE OF DOING THAT...i can simply long press my search button which i never, ever use and i get the complete action using option and i hit the IN-App wifi toggle and within a few seconds my wifi is on and i am surfing the internet on my wifi. This application would have been so awesome to have when the hero was having issues downloading video or picture messages over wifi. would have been a simple long press and immediately turn it off to download the picture while in text. I highly recommend this app for anyone that wants to conserve batterly life, gets annoyed easily by having to stop what you are doing and turn your wifi on, or just simply likes a quick and easy fix. i haven't upgraded to the evo just yet but from what i am hearing on its battery life this app sounds like a lifesaver for evo users as well. maybe this review will be ticket to that upgraded evo.