Yeah, that is what I thought regarding the app but was hoping against hope that there was some trick or shortcut.... :-( As far as the 'stealing' part, I would be happy to pay some reasonable fee for the software to be usable with different hardware though I doubt that is going to be offered.
As usual, the good hardware guys are not so hot with software, the the good software guys are not overly spiffy with apps.... and this is why automation engineers exist, the entire group of 9 at the last meeting.
Yep, a directional antennae and re- broadcasting unit would be the right device. It would have to be small, easily packed and carried, and battery powered. Most likely the display and WiFi receiving unit will be an Apple Ipad, so tapping into an Ethernet is not going to happen.
Thanks for the input guys, it is appreciated.
Brian
Brian;
Apps
Unless the app is open source (and you know programming) this is usually just about impossible. Difficult even if it meets both those criteria. If you can find an app that does 'nearly' what you need, you might have some luck talking with the developer, but this too is just a 'hail-Mary' type solution.
Wifi issues
Wifi repeater/Amps are available that simply take the input signal. boost and re-transmit the same signal... I haven't found them to be super reliable, but that may just be my experience - maybe I was a little too optimistic on range. I ended up getting a second router, and a special 150' low-impedance Cat6 cable connecting it to the main router to solve my reception issues. Cable can be pricey, but once installed is very stable.
You could always build your own transmitter/receiver pair : google yagi antennas, usually made with Pringles potato chip cans or coffee cans (I think the Pringle cans work better, but I haven't actually tried the coffee cans. I have done this, and shared (for a while) my Wifi with a neighbour just under a 1/4 mile away. Once we got them aimed correctly, the reception was really good, very little interference or slowdown only in really bad weather. The only caveat is that you need a wifi router that can handle external antennas... (typically BNC type connectors)
Jamie