Best Calendar 366 Alternatives in 2026
Updated
20 apps from calendar apps ranked against Calendar 366 on the same published basis.
- 1Calendar 366 vs Microsoft Outlook Calendar
- 2Calendar 366 vs Calendar.com
- 3Calendar 366 vs Proton Calendar
- 4Calendar 366 vs Notion Calendar
- 5Calendar 366 vs Fantastical
- 6Calendar 366 vs FlowSavvy
- 7Calendar 366 vs Vyte
- 8Calendar 366 vs Tilly
- 9Calendar 366 vs Google Calendar
- 10Calendar 366 vs Amie
- 11Calendar 366 vs Daybridge
- 12Calendar 366 vs Rise Calendar
- 13Calendar 366 vs DayOtter
- 14Calendar 366 vs GroupCal
- 15Calendar 366 vs Calendar.online
- 16Calendar 366 vs Twake Calendar
- 17Calendar 366 vs Slotly
- 18Calendar 366 vs Vimcal
- 19Calendar 366 vs Informant
- 20Calendar 366 vs Calendars by Readdle
Calendar 366 alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Microsoft Outlook Calendar | 9.7 | Free plan | $1.67/mo | Android, iOS, Mac, Web |
| 2 | Calendar.com | 9.7 | Free plan | $20/mo | Android, API, Browser, iOS, Web |
| 3 | Proton Calendar | 9.6 | Free plan | Free | Android, iOS |
| 4 | Notion Calendar | 9.5 | Free plan | Free | Android, iOS |
| 5 | Fantastical | 9.5 | Free plan | Free | iOS |
| 6 | FlowSavvy | 9.4 | Free plan | — | Android, iOS, Web |
| 7 | Vyte | 9.3 | Free plan | $8/mo | Web, iOS |
| 8 | Tilly | 9.3 | Free plan | $5/mo | iOS, Mac, Web |
| 9 | Google Calendar | 9.2 | No | $7/mo | Android, iOS |
| 10 | Amie | 9.2 | Free plan | Free | iOS |
| 11 | Daybridge | 9.2 | Free plan | Free | Android, iOS |
| 12 | Rise Calendar | 9.2 | Free plan | €10/mo | Android, iOS |
| 13 | DayOtter | 9.2 | Free plan | $9/mo | Web, Android |
| 14 | GroupCal | 9.2 | Free plan | $15/mo | Android, iOS |
| 15 | Calendar.online | 9.2 | Free plan | $6.90/mo | Android, iOS |
| 16 | Twake Calendar | 9.2 | Free plan | €4/mo | Android, iOS |
| 17 | Slotly | 9.2 | Free plan | $0.83/mo | Android, API, Web |
| 18 | Vimcal | 9.1 | Free plan | $35/mo | iOS |
| 19 | Informant | 9.1 | Free plan | — | Android, iOS |
| 20 | Calendars by Readdle | 9.0 | Free plan | $1.67/mo | iOS |
Make your app an alternative to Calendar 366
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Questions about Calendar 366 alternatives
What is the best alternative to Calendar 366?
Microsoft Outlook Calendar, number 1 in calendar apps with a score of 9.7 out of 10. The others here: Calendar.com, Proton Calendar, Notion Calendar and 16 more.
What is the best free alternative to Calendar 366?
Microsoft Outlook Calendar is the best-ranked alternative with a free plan. 19 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.