OneCal Pricing 2026: Plans, Costs & Cheaper Alternatives

OneCal's published annual-billing rates are $5, $10 and $25 per user per month for Starter, Essential and Premium. Those are monthly equivalents paid as annual subscriptions: $60, $120 and $300 per user per year. Check the monthly-billing selection and any taxes on OneCal's own pricing page before buying. Facts checked October 12, 2026.

Its published plans cover 2, 5 and 50 connected calendars respectively. The page offers a 14-day trial without a credit card. For a continuing free option, SYNCDATE Free covers 2 accounts, 2 calendars and 1 sync with a 30-day forward window. We make SYNCDATE; compare current prices and arrangement limits yourself.

Compare the unit you are paying for

OneCal counts connected calendars per user and publishes unlimited sync configurations. SYNCDATE separately caps accounts, calendars across syncs, sync count and calendars within one arrangement. A total-calendar allowance does not mean every calendar can join one two-way Mirror.

For SYNCDATE, Plus covers up to 5 accounts, 20 calendars across 5 syncs and 4 calendars in a Mirror; Pro covers up to 20 accounts, 100 calendars across 20 syncs and 5 calendars in a Mirror. Push has its own higher per-sync limit. Check the intended directions before choosing the plan.

Check the features you would use

OneCal's current pages list copied-field controls and filtering, a unified view, booking links and CalDAV including Fastmail and Nextcloud. Do not choose SYNCDATE on the assumption that OneCal lacks those features. Compare the specific settings and account permissions instead.

A working OneCal setup may be worth keeping. SYNCDATE is worth evaluating when its Free arrangement or supported controls fit your job. If you only need calendars side by side, native viewing may already be sufficient. For Microsoft accounts, choose viewing or copying first.

Test the complete arrangement before deciding

Use non-sensitive calendars where practical. Test creation, a time change and deletion. Inspect the actual destination, omitted fields and Free/Busy state, then check the scheduling view other people use. A connected account or a Busy title alone does not establish blocked availability.

For asymmetric copies, review Busy one way and full detail the other. For the full vendor and migration decision, read the OneCal alternatives comparison.

Switch without two tools copying the same calendars

1. Record the original calendars, source and destination accounts, directions, copied fields, filters and date window. Identify the calendar colleagues or booking tools actually check.
2. Export or otherwise preserve the originals using your provider's supported method. An export is a recovery aid; importing it into the same calendars can create duplicates.
3. Test SYNCDATE on separate, non-sensitive calendars where possible. Review permissions and appearance before starting: the first run can copy existing eligible events.
4. Before enabling SYNCDATE on the production pair, stop the old tool from writing to that pair. Check its cleanup options first. OneCal's calendar-sync FAQ says deleting a sync offers an option to remove its clones. Removal can temporarily reopen previously blocked time. Keep the original events; never bulk-delete events merely because they look similar.
5. Inspect the destinations after cleanup. Retained copies from the old tool are not automatically adopted as SYNCDATE copies. If you cannot confidently distinguish originals from copies, stop and ask the old vendor or SYNCDATE support.
6. Start one reviewed SYNCDATE arrangement. Create a harmless Busy test event, move it, and delete it. Verify the corresponding destination copy, its omitted details and actual Free/Busy state. Repeat in the other direction for Mirror.
7. Check the Scheduling Assistant or booking tool against the destination calendar. Cancel the old subscription only after verifying the replacement and the vendor's separate cancellation procedure.

Two active services on the same pair can create duplicate copies or copy each other's output. There is no universal migration time or risk-free handover. If you need continuous availability during the switch, plan the gap explicitly before removing old blocks.

Choose the matching setup: Google–Outlook method choice, two Outlook accounts, iCloud with Outlook, or one Mirror across several accounts.