Is there a social element on the app? Can you share your tours? Share your logs? I think that people would like to know that!
What is a "gem"? Who are the people that decide whether a place is a gem or not? Are they restaurants? Sights? Strip clubs?
I also think the 100% free for a limited time is confusing. Is it going to be 50% free later? I would revise the wording there...
I would also improve the design a bit, and change the background. It would be super cool to have something like a "pirate map" representation of NYC or some popular location in the background.
Hopefully this helps, I wish you good luck with your app!