Our highest growing app was launched over 3 years ago so there wasn't much competition in that specific space. Lately we have had a lot of copy cats (even taking the exact same name).
Our goal is always to be improving the apps and adding features that the copy cats just can't do. We invest a significant amount of time in improving the apps.
No doubt we have lost some market share to the competition but it only motivates us more to keep on improving.