The latest articles on DEV Community by Paul Koch (@kochpaul). https://dev.to/kochpaul https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3827075%2Ffba4f72c-f7b3-4842-a08f-07f64cfd5a1d.png https://dev.to/kochpaul en Paul Koch Tue, 10 Mar 2026 00:00:00 +0000 https://dev.to/kochpaul/kalender-sync-closed-beta-launched-15oe https://dev.to/kochpaul/kalender-sync-closed-beta-launched-15oe <p>After weeks of intense development, it's here: <strong>Kalender-Sync</strong> enters its closed beta phase.</p> <h2> What is Kalender-Sync? </h2> <p>Kalender-Sync solves a problem almost everyone knows: you use Outlook for work, Google Calendar privately, and maybe an Apple calendar too — and lose track. Kalender-Sync connects these calendars and keeps them automatically in sync.</p> <h2> What the Beta Offers </h2> <ul> <li> <strong>Google Calendar + Microsoft Outlook</strong>: Bidirectional synchronization via OAuth</li> <li> <strong>Apple CalDAV</strong>: Connection via app-specific passwords</li> <li> <strong>iCal Feeds</strong>: Import of read-only calendars (university schedules, holidays, etc.)</li> <li> <strong>Delta-Sync</strong>: Efficient incremental updates instead of full sync</li> <li> <strong>Encryption</strong>: All credentials stored encrypted with ChaCha20-Poly1305</li> </ul> <h2> Next Steps </h2> <p>The beta phase will be used to collect feedback and test stability under real conditions. Also planned:</p> <ul> <li>Extended configuration options (filters, time windows)</li> <li>Team calendar support</li> <li>Mobile-optimized web app</li> </ul> <p>If you're interested, you can sign up for the waitlist at <a href="https://kalender-sync.de" rel="noopener noreferrer">kalender-sync.de</a>.</p> saas calendar beta productivity