Side by side
Calendar.online vs OnTime Group Calendar
Both stand on calendar apps. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan AndroidAPIiPhone+1
Calendar.online combines shared calendars, booking links, reminders, and permission controls in one service. The free Basic plan covers smaller setups, while Plus and Premium expand calendar, link, booking, and history limits.
Visit Calendar.online Free plan AndroidAPIiPhone+4
OnTime Group Calendar combines cross-platform calendar views with scheduling, meeting, and availability tools. Its Microsoft and Domino integrations support organizations using either environment or both, while licensing and trial limits should be checked before deployment.
Visit OnTime Group CalendarThe facts
| Calendar.online | OnTime Group Calendar | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Android, API, iPhone, Web | Android, API, iPhone, Linux, Self-hosted, Web, Windows |
| Lowest paid plan | Plus: $6.90 per calendar a month | OnTime Room Display: €10 per room a month |
| Plans published | 3 | 6 |
| Maker | Calendar.online | OnTime Group Calendar |
| Website | calendar.online | ontimesuite.com |
| On calendar apps | #26 of 194 | #22 of 194 |
Calendar.online: what it does well
- Free plan available forever
- Shared calendars with configurable link permissions
- Booking shows only available time slots
- iOS and Android apps
- Email and text appointment reminders
What to know first
- Basic limits sub-calendars and access links
- Calendar sync works one way
- Premium API requires Premium plan
- Paid plans billed monthly
OnTime Group Calendar: what it does well
- Shared visual calendars for team availability
- Microsoft 365, Exchange, and Domino integrations
- Delegated scheduling, polls, and availability links
- Outlook and Microsoft Teams integration
- Free levels available for up to 25 or 50 users
What to know first
- Full-featured trial expires after 60 days
- Freemium levels have limited features
- License required for each configured person or resource
- API activation requires contacting the company
Alternatives to Calendar.online Alternatives to OnTime Group Calendar The whole list