Хайрын зурхай is a free Android app developed by ISmartDev. It is a lifestyle app that helps you keep track of your friends' and family members' birthdays. With this app, you can enter the birthdays of all your loved ones and receive reminders when their special day is approaching.

The app allows you to add the name and birthdate of your friends and family members. You can also add notes and reminders for each person. The app will send you a notification a few days before each birthday, so you can prepare a gift or a message for your loved one.

Overall, Хайрын зурхай is a useful app for those who want to keep track of their friends' and family members' birthdays. The app is easy to use and has a simple interface. However, it would be nice to see some additional features in future updates, such as the ability to import contacts from your phone or to send birthday messages directly from the app.