Getting a Rainlendar Pro license key is significantly better than sticking with the free "Lite" version, mainly because it transforms the calendar from a local, isolated desktop tool into a fully synchronized, multi-platform organizer. For approximately €9.95 (as of 2026), it offers a lifetime license that removes the annoying "[UNREGISTERED]" text from every event and unlocks essential online features.

Your desktop calendar is the backbone of your productivity. Don’t trust that to a hacked key from a shady forum. Invest in Rainlendar Pro legitimately – and never look back.

Features of Rainlendar Pro

Clear visual feedback (e.g., "Pro Active") to replace the current system where users only know it worked if the [UNREGISTERED] tag disappears. One-Click Upgrade:

Q: Does Rainlendar Pro require an internet connection?
A: No. Only for syncing with online calendars. The core app works entirely offline.

Third-Party Synchronization: Connect directly to Google Calendar and Google Tasks, Microsoft Outlook (Windows only), Office 365, and CalDAV servers.

Unified Task Management: You can integrate online task lists like Remember The Milk or Toodledo, keeping your To-Do's and appointments in one clean interface.

Official Store: Purchase directly from the Rainlendar Purchase Page. Payment: Payments are typically processed via PayPal.

Task Management Integration: Sync with popular task managers like Remember The Milk and Toodledo.