— Push notifications when someone unfollows you.
— Detailed view of each unfollower. In there you'll be able to see their bio, last tweets, and some useful buttons to follow, unfollow, and even block that traitor (yes, now revenge is one tap away).
— Find out for how long a user was following you before deciding to unfollow you.
— Do you ever wonder why people unfollow you? Sayonara will tell you which was the last tweet that they saw!
— You can send a tweet directly from the app: why did you unfollow me? was it something I said? Is it because of the way I look?
— You can configure your account to only receive notifications from people you follow.
— And, of course, if you have multiple Twitter accounts Sayonara will work for all of them.