OneCal review

OneCal tackles the multiple calendar problem from two sides at once. Its sync engine copies events between Google Calendar, Outlook, iCloud Calendar and CalDAV calendars in real time, one-way or multi-way, so a colleague who looks at your work calendar sees the dentist appointment you booked in iCloud as busy. Filters decide what crosses over: you can sync by title, color or category, RSVP status, or only during set hours, hide details behind private event controls, and skip all-day events, birthdays or out-of-office entries. The second half is the Unified Calendar View, which shows every connected calendar in one interface with drag and drop editing, RSVP, one-click meeting joins and multiple time zones, plus apps for iOS, Android and macOS. Every plan includes unlimited scheduling links and unlimited synced events. The limit is calendar count: Starter at $5 per user per month billed annually covers 2 calendars, Essential at $10 covers 5 and Premium at $25 covers 50.

Who it is for

people who keep separate work and personal calendars on different providers

Price

No free plan, 14-day free trial; Starter $5 per user per month billed annually ($60) for 2 calendars.

Starter $ 5 /user/month Billed annually ($60)
Quoted from the vendor pricing page on November 11, 2026.

Key features

• Real-time sync between Google Calendar, Outlook, iCloud Calendar and CalDAV
• Unlimited sync configurations and unlimited synced events on every plan
• Unified Calendar View that shows all connected calendars in one interface
• Unlimited one-on-one and collective scheduling links
• iOS, Android and macOS apps

Strengths and weaknesses

• Strength: Starter costs $5 per user per month billed annually
• Strength: Filters choose which events sync by title, color, RSVP status or time of day
• Strength: 14-day free trial without a credit card
• Weakness: Starter covers only 2 connected calendars; 5 need Essential at $10
• Weakness: No permanent free plan
• Weakness: Removing OneCal branding from booking pages needs Premium at $25

Key facts

• Free trial: 14 days, no credit card
• Starter: $5 per user per month billed annually, 2 calendars
• Essential: $10 per user per month billed annually, 5 calendars
• Providers: Google, Outlook, iCloud, CalDAV

Where it ranks

OneCal is No. 2 in our Best Apps to Manage Multiple Calendars verdict.