This is an interesting service for iOS and Android users. It’s called Artist Growth. It’s designed to help musicians manage their careers through the app by keeping track of and scheduling gigs, finances and more.
It’s especially useful for the touring musician, as it lets them keep track of merch (such as inventory, revenue, etc). Everything is tracked as far as tour dates, travel schedules, spending, and money coming in.
There is also direct integration with BMI, which will help them earn royalties for their live performances as well.
There is an interesting interview with the developer at TUAW.
You can check out the App here.