Ads are a part of Birthdays Reminder. This application is often downloaded by Samsung and HTC users. It's free to get the installation package of Birthdays Reminder, also, you can read users' reviews on Droid Informer. The app runs on Android 2.3.3 and higher.
The download of the app doesn't contain viruses or any kind of malware.
As users indicate, you can find such benefits of this application as an easy-to-use interface and calendar notifications. As users see it, the obvious drawback of Birthdays Reminder is lots of ads.