This product would be the bomb if it worked. I bought this product with the Andersen leveling blocks over the winter. The combination of these two products should make leveling a trailer a one-person, one-step process. Last weekend, we took our first trip of the season. The Andersen blocks are wonderful...highly recommended. The set-up for the this app app was very easy and the install of the hardware was very easy. I even installed the unit in the front of the trailer for best connection, as recommended. Unfortunately, from the driver's seat of the pickup, I could not get a reliable connection. This is sad because it is not a far distance at all. It would connect and give me a reading. I would then adjust the trailer. I would then have to shut down LevelMatePRO and restart. After a minute or two, I could read the settings and make another adjustment of the trailer. Shut-down LevelMatePRO , restart, wait, repeat. Over and over again. Not what I paid $140 for. I really hope it's a simple app upgrade or they need to work out the bugs. I am running LevelMatePRO on an iPhone 7. Sadly, I think this was just an expensive lesson for me.