Follower Checker for Twitter is a free Android application developed by Stren that allows users to manage their Twitter followers and followees easily and simply. The app has a clean interface and does not have full-page ads, making it convenient to use.

With Follower Checker for Twitter, users can easily find out who does not follow them back and who they do not follow back. The app also allows users to quickly follow or unfollow users with a single touch and sort their followers into oldest, newest, and those who do not tweet. Additionally, the app supports multiple accounts.

It is important to note that the app has limitations due to Twitter API restrictions. It cannot be used if the follower/followee exceeds 75,000 and may potentially make users wait for 15 minutes due to API usage. The Follow API can only be called 1000 times per 24 hours at the app level. Users can add additional accounts with the Pro or Light versions, but the data cannot be transferred between versions.