Birthday Countdown is a free Android app developed by Perfect Tools that helps you keep track of your and your loved ones' birthdays in an easy and fun way. With this app, you can insert the date of the birthday and it will automatically calculate the age and time until the birthday. The app also sorts the dates according to the nearest one, so you can see at a glance who's next in line for a celebration.

One of the best features of this app is the colored choices for each birthday, which adds a personal touch to the countdown. The app is very easy to use and the interface is simple and intuitive. Plus, it's completely free! With Birthday Countdown, you'll never forget a birthday again and you'll always be ready to celebrate with your loved ones.