For me, there are three basic kinds of apps: Those that I use frequently and can't live without, those that provide diversions of one form or another, and in-the-moment apps. Slow Shutter Cam is what I call an "in-the-moment app" because, well, it's basically useless until you have a reason to tap it to life. Another way to think about it is like a tool for your toolbox of photography apps.

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