I tried the Soar app today and it worked. I was able to download the maps and use the app for about an hour with 3 batteries. The controller for the glasses stayed cool. I always hide it from the sun and keep it in the shade but decided to expose it for the full hour to a hot sun. The controller never got hot it got a little warm but never hot. Usually I bring along a power pack to keep the controller of the Mavic charged it is very poor and runs out of power quite quickly. I forgot today and the MA controller went down to 10% but I am sure the BT glasses controller could have gone on remaining only warm. The app is a huge improvement it keeps the BT glasses controller from overheating. It was at 44% power. The outside temperature it was only 20 C and the humidity low but it was exposed to the sun. If he app can repeat this then it is a huge success and solves the biggest problem at the BT 300 glasses.