Syncydo and OneCal compared
Both keep your calendars in step so you're never double-booked. The main differences are the free plan, the price, and which calendars each one covers.
Updated November 12, 2026
At a glance
| Product | Free plan | Paid, per month | Calendars |
|---|---|---|---|
| Syncydo | 2 calendars, no time limit | $3.99 for 5 calendars $6.99 for 10 | Google, Outlook and Microsoft 365, Zoho, iPhone and Android calendars |
| OneCal | 14-day trial | $5 for 2 calendars $10 for 5 $25 for 50 billed yearly | Google, Outlook, iCloud |
Prices and plans checked on each product's own website on November 10, 2026. They change, so check before you buy. Prices in US dollars.
What OneCal does well
OneCal is an established calendar sync tool with thousands of customers. It also offers booking links and a plan for up to 50 calendars, which suits teams and people with a lot of accounts.
What Syncydo does
- Holds your time everywhere. A meeting in one calendar becomes a private Busy hold in the others, both ways, so nobody books over it.
- You decide who sees what. Colleagues and clients see Busy. Only you see the details.
- One view of your day. Every calendar in one list, with clashes flagged and a Join button on each call.
- Free for 2 calendars, for as long as you like. No card, no trial clock.
- Your AI assistant can read it. On Plus and Pro, Claude, ChatGPT or Gemini can read your whole week, read-only, and find time that's free everywhere.
Which to pick
- Pick Syncydo if you have 2 calendars and want it free for good, if 5 calendars at $3.99 a month suits you, or if you use Zoho or phone-only calendars.
- Pick OneCal if you want booking links in the same tool, or you need more than 10 calendars.
Questions
Is Syncydo cheaper than OneCal?
For 5 calendars, Syncydo Plus is US$3.99 a month, or US$29.99 a year. OneCal's 5-calendar plan was US$10 a month billed yearly when checked on November 10, 2026. Syncydo is also free for 2 calendars.
Can I move from OneCal to Syncydo?
Yes. Turn off the syncs in OneCal so its holds are removed, then connect the same calendars in Syncydo. It takes about a minute.