I've been using smartphone apps for almost 10 years, ever since the iPhone 3G.
I find them such a valuable tool for giving me the best chance to getting out in the field and jagging that awesome light.
Check out the below video to find out what apps I use and recommend.
Links below to all the apps I mentioned in this video.
Check out the Team 3CX photography community here.
Enjoy and share to spread the photography love.