App promotion is getting more and more difficult recently. We are the team behind storytelling app pixotale and photo apps including Levitagram. In our experience the most effective free promotion is to post guides on how to use our apps. We needed a simple tool to author such content but we didn't find a great tool, so we built one. 
We made it very easy to create a "story" for your app and it's all done on your iDevice. You can write a guide, or how you developed your product, or fun facts about your team, or compare your service with your competitor's.
Check out this sample story: http://appstory.co/post/12594213/
Add screenshots from your album, or pull them from your appstore entry, then add some text. After you post you story other people will be able to vote for their favorites.
The app has been released a few days ago, and it's free: https://itunes.apple.com/app/appstory/id948149880. Or search for "appstory" in appstore.
We made it very easy to create a "story" for your app and it's all done on your iDevice. You can write a guide, or how you developed your product, or fun facts about your team, or compare your service with your competitor's.Check out this sample story: http://appstory.co/post/12594213/
Add screenshots from your album, or pull them from your appstore entry, then add some text. After you post you story other people will be able to vote for their favorites.
The app has been released a few days ago, and it's free: https://itunes.apple.com/app/appstory/id948149880. Or search for "appstory" in appstore.