this is very off-topic to YGOPro and even unrelated to YuGiOh...
i just recently discovered this card game... and it looks cool... you can battle with different characters from the famous animes like Monogatari series,, To LOVE-ru Darkness,, Fate-Zero series,, Fate-Kaleid series,, Persona,, Konosuba,, Angel Beats,, Melancholy of Suzumiya,, Love Live!,, Toaru series,, and more (even Vocaloid characters)... and i want to play it online like YGOPro...
i don't know who are the developers of YGOPro or on how to contact them... i just want to request to them to also consider on making an app (most likely same features to YGOPro) of it (Weiss Schwarz)... since YuGiOh is also an anime,, they might be also an anime-lovers and might took interest to Weiss Schwarz...
i found an online game of Weiss Schwarz.... but it's hard to experiment on building decks... you can't easily switch in viewing/reading cards details unlike the deck building features on YGOPro... they don't have separate app and you can only play it on your internet browser...
i hope the developers of YGOPro or even someone consider making an app of Weiss Schwarz... i want to learn that game and play it with my favorite animes... :)
***Weiss Schwarz also have certain websites which gives a full detail/translation for their cards... there are also websites that have pictures of the whole cards (the online game that i saw have picture files of them)... most of them are updated... there are also websites that gives detail about card rulings and latest banlist...
***it might be difficult to them because Weiss Schwarz has different gameplay/ruling/card effects but it has less cards compared to YuGiOh...
***it also have a PSP game which features only few decks...