Download it. It's free and you don't get charged extra or whatever from your exsisting account if you download this. The shotty reviews are garbage. You can adjust volume, all you have to do it tap the screen and slide your finger across the dial. Video and sound being out of sync has to deal with your own appliance and how good your Internet signal is, not the app itself.

I purchased a classic motor home I'm in the process of restoring. In the battery drawer there were 4 batteries and I suspected problems there because the lot would be dead in a couple days and I could not fine an electrical problem that was draining them.