What happens when app makers1 come up with the same app at the same time… independently?

For what it’s worth, I’ve played Donsol and Card Crawl and they are both killer, but very different. The former is more bare-bones and “one off”, like the oldskool Rogue it draws from. The latter is fancier and has more persistent RPG-esque elements. Either will happily keep you occupied on your daily commute.

  1. Though mobile app making is hardly the only place this sort of this occurs… []