Phone Awards: What's the best app from the past 12 months?

It's that time of year again - the 2015 TechRadar Phone Awards are just around the corner and we're calling on your, the fabulous general public, to help us pick a winner in our 'App of the Year' category.There are a ton of apps which have a strong case for a nomination in this category, so we've winnowed down the selection to 15 apps which have pushed the boundaries of our smartphones, and our lives, over the past 12 months.Please scroll down to place your vote.Whatsapp - iOS / Android / Window