Twinkle is an app that allows you to set and keep track of upcoming and past events, and share them with your friends. The app is free and contains a small advertisement that can be removed through an in-app purchase.

Because fetching the advertisement requires a request to a server, we can look at ad requests in order to get a look at approximate how often Twinkle is being used. While the app was released about a year and a half ago, the last few months worth of ad requests are shown in the chart below.

Version 3.0 of Twinkle added the ability to share events with your friends over BBM. Based on the above graph can you see when this update was released?

The existence of the BBM API has fundamentally changed the nature of this app. It has gone from a simple date tracker with calendar integration, to a complete social experience. While you can still choose to not make use of the app’s social features, it appears that most people are. Version 3.3 of Twinkle (coming soon) will expand these social features ever further with OS7 devices also able to share Twinkle events over Twitter, FaceBook, and Email. The typical usage of this app has completely changed from just five months ago.