Don't ever be without a level again!
Picture this -- you want to hang a shelf in your bathroom. There's a perfect spot over the toilet, and you've been meaning to put a shelf there since you've moved in. You hop on Amazon and buy what you think will work really well for the space and then set out to hang it.
Half way through you realize that you could really use a level. Yes, the shelf came with one of those templates to tape to the wall so that you know where to put the anchors, but how you don't know if you've taped it to the wall level, and when you look at it form the bathroom door it looks really crooked.
Whip out your iPhone!
Not to fear -- located in your iPhone is a level that can help you out in a pinch. Hidden in the compass app, the level works both flat against a surface or on an edge. Perfect to help you hang!