You can choose from three basic types of steel door: (1) steel only; (2) steel with insulation on the inside; and (3) steel on both sides with 1-3/8 to 2 in. of insulation. Other features that add to the cost are thicker insulation and windows, especially insulated windows. The do-it-yourself tensioning systems also add a little to the door’s cost. Be sure to specify exactly what you want.
The Phone App: A basic, functional, app with a few frills. It works well enough though some settings are best changed on the web site (that I didn’t know about). When installing the smart hub your phone will need to be on your 2.4ghz wireless network to complete the setup. After that, it doesn’t matter what your phone is connected to - your home network or a cell connection. The system can be setup entirely from your phone. I set up an open alert, a close alert and a 10pm door not closed reminder. The alerts can be sent to you via Text or email.
I'm not a professional, but I watched as my garage doors were serviced last year. The tech used a spray lubricant (I had bought a different brand in the garage door section of a home improvement store). He sprayed the inside of the entire track, top and bottom, the rollers that ride along the track, and all hinges on the door. He sprayed each hinge twice -- once on each side. The techs were more generous with the lubricant than I was when I'd done it before, so don't be afraid to give it a good squirt.