Sometimes photos don't look as you imagined they would when you're snapping them. It is something I find with most of my photos and I'm always looking for a way to have the picture in my head be the one that is actually taken.
Snapseed is an app for editing photos that makes it quick to adjust light, contrast, colours, etc. You can also add a range of different effects and tune the intensity. This means that in a minute a photo can go from this:
to this: