Celebrate birthdays in a unique way with the Happy Birthday app! With this app, you can blow out virtual candles on a cake, even if you don't have an actual cake to blow out. It's perfect for singing "Happy Birthday" to your friends and family, making their day extra special. To use this, all you have to do is enter the celebrant's age for the number candles. Then, they must blow on your device's microphone to put out the candles.

This app is easy to use and provides a great surprise element for birthday celebrations. With this, you can bring the fun anywhere.