Developing an original idea into a successful mobile app and releasing it into the market is a costly affair. This is because any good idea needs a great development team for implementing and actualizing it. The best way to raise funds for an original mobile app that will tick in the market is to meet investors/venture capitalists and share the idea with them.
If they believe that the idea is worthy enough to be developed into an app, they will most likely be ready to support you with the funds.