My fourth app was a larger time investment and gets quite a lot more downloads. It makes no income now, but I'll add In-App Purchases soon.
I'm freelancing for ~45 hours a month to fund this while backpacking all over the world. I should blog about it.
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Edit: I put up a LaunchRock page, if you would be interested in a blog about this stuff, leave me your details: http://theoreticalblog.launchrock.com