Coinometer for Bitcoins (iOS app)

As a part of my personal challenge to learn iOS app design and Swift, I made an iOS app earlier this year for bitcoins.

It's a price tracker and profit/loss measurement butler for your bitcoins. More information about the app can be found here: http://hardik.org/coinometer/

I designed the logo for the app myself since I didn't have budget or willingness to outsource it to someone else. I wanted to own the identity and the feel of the icon. Since it's a profit/loss measurer app, it made sense to add the mathematical symbols to signify numeric persona of positive and negative price fluctuations.

Here's what I came up with. :)