Forget everything you've read about app stores bringing in billions upon billions of dollars a year. For all the growth this market has seen, for all the apps that have become runaway success stories — does any of it really matter when four sisters with a dream can't find a way to keep their personal apps going? That thought's been running through our head this week after getting word that Kim Kardashian, Khloe Kardashian, Kourtney Kardashian, and Kylie Jenner are all shutting their apps down.

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