Update: this app does not prevent the phone to sleep, if no order comes thru, it let the phone to be of, it does the same for restaurants tablets, so a lot of times tablets goes off and restaurants are unaware there is an order. this translates into longer waiting times, Restaurants keep complaining i arrive to early and it seems true, we drivers should be sent to the restaurant closer to pick up time, allowing restaurants to have food ready and not waiting so long for the order to be made