Is there an iOS alternative to HTC's Zoe? I'm considering a switch back to iPhone and iOS from my Android powered HTC One (M7) phone. HTC created a super cool app called Zoe. I'm wondering if there is an equally good alternative to Zoe on iOS.

If you don't know what Zoe is, it takes your media (photos, videos) and creates really nice, themed video clips. Themes influence things like background music, video transition effects, various graphics effects (old film, zoom, etc.)

See this video for example of a Zoe: 

London pt. 1

Update from 6/16/2016

At the WWDC 16 Keynote Apple presented a new Photos feature called Memories. This is basically exactly what Zoe does on HTC.
You want to take a look at Quik. This app was called replay, doing exactly what you are looking for. They got acquired by GoPro, and the name changed to Quik.