Use APKPure App
Get Vk happy friends old version APK for Android
Sync birthdays VK friends with phone
Synchronizing Birthdays Vkontakte friends with your phone's calendar
Сall friends
Send SMS
Send private message
Send a congratulatory photo on the wall of another user
Notification birthdays of your friends for a few days before the event
Share photos with your VK friends
Official group: http://vk.com/vk_happy_friends