I would love a phone game app for DM, like Yu-GiHo!'s, and would contribute to it.

With collecting cards, dueling NPCs and friends, and the graphics of the cards...

Share the idea, please :]
Yours, SouthFrozen

Do you mean a social Duel Masters platform, where you could hook up with your friends to play DM and even create a clan or group for your local community? And possibly involce digital boosters: This should probably still be free or earnable via in-game currency since it would not be an official product.

I heard that at least @NitroX is somewhat involved in a Duel Masters mobile application.

It's more of a general browser-based application. It's clumsy on mobiles so far, but works. Very much incomplete though.
I have a very rough front-end build deployed here, if you want to check:

https://dm-application.herokuapp.com

We have two dudes in the wiki server also making a game on DM, strange they too are stuck in dev hell
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"What is the will of a fallen but to rise once more! What is honor but to die gloriously once more! They say that a man confined to an idea knows no bounds but what is an idea but to be free no more. I try to break free, oh how i try, yet what is life but to be thrown in the storm once more!"