Web service will help mobile developers to pick keywords automatically, which in turn will enable their applications and games to take the leading places in the search results for relevant queries in the App Store.
1. Basic features will work for free.
2. 14-days demo version of professional plan
3. Tariff plans: basic; standard; professional
The idea is very scalable, it even can give rise to creation of entire ecosystem of mobile application development.
If you want to know everything about the idea in detail, don't hesitate asking me.