Name says it all - I just discovered and downloaded "100 Cameras in 1" which lets you easily tweak photos with thousands of results in a super simple way.

Basically you either select a photo from your library or take a new one and immediately you can swipe sideways and the app shows you 100 different tweaked versions. Once you stop on one you like, you can tweak it/add a layer, and then swipe again and ANOTHER 100 versions are available. There are also a ton tweaking effects. Pretty incredible for those who don't have the time/expertise to use Photoshop like tools.

I just downloaded it and am sat the tip of the iceberg - but it seems pretty awesome...