What iphone apps with be trending within a year?

I'm a student in mutlimedia design and development and i want to build a mobile app next year, what apps do you think will be trending in a year, i'm looking for fun simple apps like instagram, and vine

It is very hard to predict that. But I personally feel that 'utilities' apps do much better because people tend to use use use it frequently in day to day life. There are quite a few. But there has been a surge in the personal safety apps like http://www.ixtentia.com/portfolio/SOS-Stay-Safe-personal-safety-app.html
With crimes increasing at an alarming pace throughout the world, these might be the next trending things.

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