What are some good photo apps for an iPhone?

I like to design photos into cool hipster photos and so far I have shape ones and boarder ones but I need more any idea's? 5/5 please help thank you

Just a thought, how about some weird puzzle shapes all chopped up, kind of abstact looking so your eyes can piece the puzzle shapes into the photo picture, without solving the puzzle physically?

Pictures of the various solar systems in space, Weather pictures, pictures of planets and suns individually, made into hipster photos? But I would say there's your start? Just an idea.

As far as apps go, my favorite is Aviary. It really lets you make a simple photo into something beautiful. I've got a lot of complements on my edited photos using Aviary. As for ideas, I would go for a hazy effect or bright pops of color in dull settings. Kind of like color splash. A grunge or vintage vibe would work well too. Overall, have fun because your ideas are creative.