OneCal AlternativesCalendar Apps like OneCal

OneCal is described as 'Productivity tool that aims to make calendar synchronization as easy as possible. It has a very intuitive UI, supports multi-way syncs, and is fully configurable (you can choose to sync event titles, descriptions, and participants, assign colors to clone events' and is a Calendar app in the office & productivity category. There are more than 10 alternatives to OneCal for Web-based, SaaS, iPhone and iPad. The best OneCal alternative is Keeper, which is both free and Open Source. Other great apps like OneCal are SyncThemCalendars, Kalender Sync, Neocal and Calendar Family.

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Alternatives
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Alternatives list

  1. Keeper icon

    Keeper

     2 likes

    Keeper is an open-source calendar syncing tool that can be used to sync the blocks of time marked as "busy" on your personal, work, business and school calendars.

    Cost / License

    Application type

    Platforms

    • Online
    • CA flagCanada
    Keeper's landing page showcasing its core features: calendar aggregation, event anonymization, iCal feed export, push syncing, and self-hosting support.?
    Good alternative?
     
  2. SyncThemCalendars icon

    SyncThemCalendars

     1 like

    SyncThemCalendars allows you to block time in one calendar based on events in another calendar.

    Cost / License

    • Paid
    • Proprietary

    Application type

    Platforms

    • Online
    • Software as a Service (SaaS)
    Good alternative?
     
  4. Kalender Sync icon

    Kalender Sync

     1 like

    GDPR-compliant two-way calendar sync across Google, Outlook / Microsoft 365, iCloud, CalDAV and German providers like GMX. You choose per sync what is shared: busy only, title and time, or full details. Connects to Claude and ChatGPT via MCP. German company, German servers, DPA available.

    Cost / License

    • Freemium
    • Proprietary

    Platforms

    • Online
    • Software as a Service (SaaS)
    • DE flagGermany
    • European Union flagEU
    Kalender Sync Dashbaord
    Good alternative?
     
  5. Neocal icon

    Neocal

     2 likes

    Neocal is an AI-powered modern calendar app that helps you manage your busy schedule without hassle. Just tell it what you need, and it takes care of the rest, making scheduling and planning easier.

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Online
    • US flagUnited States
    Neocal screenshot 1
    Good alternative?
     
  6. Calendar Family icon

    Calendar Family

     Like

    Calendar Family is a free, web-based calendar-sync service. It mirrors events in real time (webhook/push, not slow polling) across Google and Microsoft/Outlook, one-way or two-way, so you stop double-booking work and personal accounts.

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Online
    Calendar Family - free, real-time calendar sync across Google and Outlook
    Good alternative?
     
  8. Hetk icon

    Hetk

     Like

    Hetk syncs Google Calendar, Microsoft Outlook, and Apple iCloud in real time. Bi-directional sync, privacy controls that mask event details, and identity transformation.

    Cost / License

    • Paid
    • Proprietary

    Application type

    Platforms

    • Online
    • EE flagEstonia
    • European Union flagEU
    Hetk screenshot 1
    Good alternative?
     
  9. Chronock icon

    Chronock

     Like

    Sync multiple Google Calendars in real time. Auto-detect availability, share scheduling links, and manage bookings — with built-in CRM. The all-in-one scheduling tool.

    Cost / License

    • Paid
    • Proprietary

    Application type

    Platforms

    • Online
    • JP flagJapan
    Dashboard
    Good alternative?
     
  10. Multical icon

    Multical

     Like

    Multical is a calendar syncing app for fractionals, consultants, multi-hyphenates and portfolio careerists who want to stop getting double booked across clients.

    Cost / License

    • Paid
    • Proprietary

    Platforms

    • Online
    • Software as a Service (SaaS)
    • US flagUnited States
    Multical screenshot 1
    Good alternative?
     
  11. SYNCDATE icon

    SYNCDATE

     1 like

    Calendar sync utility that keeps Google Calendar events aligned across multiple accounts with privacy controls, sync health monitoring, and clean rollback.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • RO flagRomania
    • European Union flagEU
    SYNCDATE Home page
    Good alternative?
     
  12. Calensync icon

    Calensync

     Like

    Calensync allows you to synchronize multiple Google Calendars together, including from different account!

    Cost / License

    Platforms

    • Online
    • LU flagLuxembourg
    • European Union flagEU
    Example dashboard with two google accounts, and two synchronization rules
    Good alternative?
     
  13. CalendarPipe icon

    CalendarPipe

     Like

    Programmable calendar sync that lets you filter and transform events as they move between Google Calendar, Outlook, and Apple Calendar.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • Software as a Service (SaaS)
    • CZ flagCzechia
    • European Union flagEU
    CalendarPipe screenshot 1
    Good alternative?
     
  14. SyncGene icon

    SyncGene

     Like

    Sync Contacts, Calendar and Tasks automatically Across iPhone, Android, Outlook, Gmail and apps

    Cost / License

    • Paid
    • Proprietary

    Platforms

    • iPhone
    • iPad
    • Software as a Service (SaaS)
    • US flagUnited States
    SyncGene screenshot 1
    SyncGene screenshot 2
    SyncGene screenshot 3
    Good alternative?
     
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