Your calendars, finally protecting each other.
A personal event automatically blocks the matching time on your work calendar — and back. Without an account, a server, or anyone seeing why.
Free for 7 days — no card, no account, no sign-up.
Protection rules
Set a rule once: when my personal calendar has an event, block that time as Busy on my work calendar. Calendum creates the block, owns it, and keeps it healthy — if the event moves, the block moves; if it's deleted, the block disappears.
Nobody at work sees what you're doing. They just can't book over your life anymore.
Plan your day, not just your meetings
- Drag tasks straight onto your timeline — time blocking without the ceremony
- Repeating tasks that reschedule like adults
- Apple Reminders sync, both directions — complete it anywhere, it's done everywhere
- Day, multi-day, and week views built for real planning
- Widgets that show what actually matters next
Honest by design
No streaks, no confetti, no guilt mechanics. Calendum's insights tell you where your time went — that's it.
Private by architecture, not by policy
Calendum has no server, no account, no sign-up, and no analytics SDK. It works directly with the calendars already on your iPhone — iCloud, Google, Exchange, anything — through Apple's own frameworks.
Your data never touches us because there is no "us" to touch. That's also why we can offer a one-time purchase: we have no cloud bill to pass on to you.
Pricing, plainly
Everything free for 7 days — no card, no account, no sign-up. Need more time? One tap adds another week, no questions asked. Keep it forever for $14.99. Once. That's the whole pricing page.
Built by one person who got double-booked one time too many.