Hetk vs OneCal: at a glance
| Hetk | OneCal | |
|---|---|---|
| Google Calendar | Yes | Yes |
| Microsoft Outlook | Yes | Yes |
| Apple iCloud | Yes | Yes |
| One-way sync | Yes | Yes |
| Bi-directional sync | Yes | Yes |
| Privacy controls | Replace the details with “Busy”, Flag the copy as private, title templates | Choose what event information to sync, on every plan |
| Real-time sync | Google and Outlook: yes (push). iCloud: checked every 5 minutes, less often if quiet | Yes |
| Scheduling links | No | Yes |
| Unified calendar view | No | Yes |
| Mobile apps | No (web app) | iOS and Android |
| Free trial | 21 days | 14 days |
Where Hetk wins
No cap on calendars
Hetk connects unlimited calendars on both plans and limits sync pairs instead: 3 on Personal, 8 on Professional. OneCal caps calendars by tier: 2, 5 or 50.
Longer free trial
Hetk offers a 21-day trial vs OneCal’s 14 days.
Where OneCal wins
Scheduling links
OneCal includes Calendly-style booking links. Hetk focuses purely on calendar sync, if you need scheduling links, you’d use a separate tool.
Unified calendar view
OneCal offers a combined calendar interface where you can view and manage all your calendars in one place. Hetk syncs events between calendars but doesn’t provide a separate calendar UI.
Mobile apps
OneCal has apps for iOS and Android. Hetk is a web application.
Cost and switching
This page compares features. For every tier and what each setup costs, see the OneCal pricing breakdown. For what you keep, what you give up and the steps to move, see the OneCal alternative page.
OneCal pricing, plan limits, apps and trial checked 2 October 2026 on OneCal's pricing page. Plans may have changed since.Feature-by-feature analysis
Both Hetk and OneCal sync calendars across Google, Outlook, and iCloud. Where they differ is scope.
OneCal wraps calendar sync into a broader platform that includes scheduling links and a unified calendar UI. If you want to manage multiple calendars from one interface and share booking availability, OneCal’s bundled approach makes sense.
Hetk takes the opposite approach: it is sync only. If you already manage your calendars in Google Calendar, Outlook, or iCloud and just want them synchronized, that is the whole product. The privacy controls (Replace the details with “Busy”, Flag the copy as private, title templates) are built in on both plans, so you choose what gets synced and how events appear across providers.
On speed: Changes in Google Calendar and Outlook usually arrive within seconds, through push notifications. A safety check runs every 15 minutes in case a notification is missed. Apple iCloud has no push. Hetk checks iCloud every 5 minutes, and less often for a calendar that has been quiet. OneCal also describes its sync as real time. We have not timed the two side by side.
FAQ
Does Hetk have scheduling links like OneCal?
No, Hetk focuses purely on calendar sync. If you need booking links, pair Hetk with a separate scheduling tool, or use OneCal, which includes them.
Can I use both Hetk and OneCal together?
You can technically, but it’s not recommended. Running two sync services on the same calendars risks duplicate events and conflicts. Pick one per sync relationship.
Does OneCal offer better privacy controls?
Both platforms include privacy controls on every plan. OneCal lets you choose what event information to sync between calendars. Hetk gives you Replace the details with “Busy”, Flag the copy as private, and title templates.
How do sync limits work on each platform?
Hetk supports unlimited calendars on both plans. The limit is on sync pairs: Personal supports up to 3 sync pairs, Professional supports up to 8. You can connect as many calendars as you need between those sync pair limits. OneCal does it the other way round: calendar syncs are unlimited on every plan, and the number of calendars is capped at 2, 5 or 50 by tier.
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