More Platforms
The next step to your product is expanding the audience. If your app was built on iOS it is time to make it available on Android or vice versa. The process of expanding onto a new platform should be smooth and relatively fast. You know your product inside and out, and you also know what your customers want.
If your app is already available for both Android and iOS you should submit your app to alternative app stores such as the Amazon App Store or GetJar. In other app stores the liklihood of being featured is increased and it is easier to get noticed.
Marketing and Growth
Marketing budgets for mobile products can often be lean, but there are many great ways to market your app without a budget. Implementing social capabilities into your app is a great way to facilitate and encourage customers to share their experiences with their friends. Happy customers make the most effective marketers.
A video showing off your app is a powerful marketing device that can easily be shared and spread. Blogging, commenting on blogs, developing relationships with journalists, getting press, sponsoring events, and participating in events are all things that any company can do.
Use your website to drive traffic to your app's download page. A common mistake on websites is not mentioning the existence of a mobile app that is available for download.