I used to work at a video game store.
When customers were trying to decide which system to purchase, this is what I would tell them:
“Focus on the game library.”
I think the same can be said for smartphones and tablets. There are many apps that can be used on multiple devices–sometimes better and sometimes worse–but what can really separate the different OS’ are the exclusive apps. If you find that your favorite apps can only be found on a particular platform, that’s the direction you should probably go.
Take a look at how the number of apps compare from app store to app store:
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Of course, just because you offer a lot of apps, doesn’t mean they’re any good. Still, though, some interesting numbers in this comparison.
What mobile app couldn’t you live without?