I was told that you could operate Lionel Legacy engines with the MTH smartphone app if you had a TMCC/Legacy cable connected from the TIU to a Legacy command base. The only command base I have found one Lionel's website is this:
http://www.lionel.com/products...-command-set-6-14295
Is there another way of getting one? Or is this it.
(Sorry, but I'm not too experienced with model railroading technology, so please try to be simple.)