Since the app pairs with the loco's, I believe you can pair different loco's to different devices so you can have 3 different loco's controlled by 3 different throttles (devices). You can not have 1 loco controlled by multiple devices.
Correct Darrell. If you had an operating session with friends, each could have a device and control a loco or locos.
In addition one person with one device can control many (I think 99?) Locos. But only 4 separate throttles will show on the screen at once. You would have to swipe to see the next 4.
Android must be around the corner. I was contacted about beta testing.