train ticket booking apps with delivery option?

goshawk on horseback

hello all,
does anyone know of any train ticket booking apps for the iPhone, that have the option of getting tickets sent to one, rather than going through all of the collecting them fiasco?
I have tried a number of such apps, and none of them seem to have an option for having tickets delivered, although I know that this option is often available on websites, so why not on the apps?

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