I don't think you have to post according to theme, as long as you use the #smartphonephotography tag, but the theme for @juliank's smartphone photography conteest today is "fire" so your picture should include fire of some sort if you want to be in the contest.
I don't think you have to post according to theme, as long as you use the #smartphonephotography tag, but the theme for @juliank's smartphone photography conteest today is "fire" so your picture should include fire of some sort if you want to be in the contest.