I've been using Union a lot lately to make PNG's with transparent backgrounds that I can use as stickers in iMessage. The challenge is that I then have to find an iMessage app that will let me import the stickers I make with Union. Some don't maintain a PNG's transparent background. I would love it if there were a Union iMessage app that let me do this and could except imports from Union. I would be willing to pay for that iMessage app :)