Holidays with only an iPhone?

[luckyme]

I'm going to go on vacation soon with the family. We're visiting family, going to a theme park/water park and visiting the zoo that also has a huge splash zone.

The more I think about it, the more I don't want to bring my dSLR with me, mostly because I want to play in the water park too, and not have to "guard" the camera gear. So, that means that I'll bring just my iPhone.

What photos apps do you guys recommend for vacations? I have a few I like to use like a lot:

- VSCO
- PicTapGo
- Moldiv (for collages)

Any other "must haves"?