Problems downloading roms for nds4ios?

So I have been trying to get roms for nds4ios for a long time, but it NEVER works. Whenever i try to download a rom, there's no + to nds4ios and i can never download roms to it. I have tried Mega, Dropbox, Google Drive, and even direct downloads in google chrome but it never works! My iphone isn't jail broken.

You shouldn't be downloading roms, it's illegal

Buy the game you dumbass.

Its not illegal i have the games, i just want to play them on my iphone, which is perfectly legal if you have the games so

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