Alternatives

Products that do what Twocal – Calendar sync that verifies both sides actually agree does

1. 1
   OneCal▲324

   Synchronize your calendars in real-time

   2022

2. 2SR
   Sync – Realtime partials with Rails▲143

   2013 · chrismccord.com

3. 3TS
   Timely – Scheduling and Time Tracking, Simultaneously▲62

   2014 · timelyapp.com

4. 4
   OneCal▲125

   Synchronise Outlook and Google Calendars

   2023

5. 5MA
   MeetingBar – A menu bar macOS app for calendar meetings▲131

   2020 · github.com

6. 6
   Chronock▲110

   Scheduling and calendar sync, all in one

   22d ago · chronock.ai

7. 7AS
   A social platform to record and debate predictions of the future▲78

   2019 · predibly.com

8. 8TR
   TouchBase (re-imagining the iPhone calendar)▲102

   2011 · touchbasecal.com

9. 9SR
   Simple realtime two-way sync with SSH, fswatch and rsync▲71

   2019 · github.com

10. 10
    SyncThemCalendars▲83

    Setup a synchronization between calendars

    2019

11. 11AN
    A new platform for meaningful, balanced debates▲50

    2014 · saysaw.org

12. 12CJ
    Crudlet.js – A common, streamable interface for synchronizing data▲94

    2015 · github.com

13. 13CT
    Collaborative Time Capsules▲29

    2013 · getforword.com

14. 14TM
    Toc Messenger – A distributed messaging app that syncs across devices▲41

    2015 · github.com

15. 15AE
    An easy way to convert time▲32

    2017 · epoch.sh

16. 16ES
    EteSync – Secure and journaled sync for Android▲41

    2017 · etesync.com

17. 17MS
    Meekan, Slack scheduling robot: matches availability, syncs calendars▲16

    2015 · meekan.com

18. 18ES
    Easily Schedule with Busy People – Real-Time Calendar Sharing▲11

    2015 · web.meekan.com

19. 19CP
    CalendarPipe – programmable calendar sync via OAuth or email invites▲5

    Jun 2026 · calendarpipe.com

20. 20SI
    SpotOn.it - Synchronous Calendar Subscriptions▲7

    2014 · business.spoton.it

21. 21SA
    Sangati, a logical consistency checker for data▲17

    2016 · github.com

22. 22VA
    Verifact - A decentralised platform for verifying facts▲10

    2020 · verifact.io

23. 23NA
    New API – Stripe for calendars▲5

    2014 · onediary.com

24. 24PP
    Pendulum – Python datetimes made easy▲7

    2017 · pendulum.eustace.io

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