Download of BirthdaysPro 3.3.1 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. BirthdaysPro for Mac lies within Communication Tools, more precisely Texting & Video calls. The actual developer of this free Mac application is Demodit GmbH.
From the developer:
BirthdaysPro creates birthday lists, contact lists, and releases birthday notifications. With this utility, you are always informed about the upcoming birthdays of all your contacts. You get up to 2 notifications for each birthday. However, you can switch off the reminder for certain contacts. You can add or edit birthdays directly in the address book or in BirthdaysPro.
You may want to check out more Mac applications, such as Chax, PhoneAmego or VoIP Tracker, which might be similar to BirthdaysPro.