Happy Fathers Day is a free Android app developed by Reham Zaki that allows users to send Father's day cards to their dads via email, WhatsApp, Facebook, and other social media platforms. The app is available for download on the Google Play Store.

The app has a simple interface and offers a wide variety of pre-designed cards to choose from. Users can add their own personal messages and customize the fonts and colors to make the card more personal. The app also has a feature that allows users to add their own photos to the card, making it more unique and special.

Overall, Happy Fathers Day is an easy-to-use app that offers a convenient way to send Father's day cards to loved ones. It is a great option for those who want to show their appreciation to their dads in a creative and thoughtful way.