简体中文
EnglishWhat is SyncThemCalendars?
Updated
SyncThemCalendars is a service that automatically copies events between your Google, Outlook, and Apple iCloud calendars. You connect two calendars, pick a source and a target, and it handles copying every upcoming event — either one-way or two-way. Setup is described as taking about two minutes, with no installs or IT project required. It's aimed at anyone juggling multiple calendars who wants to stop switching between apps and avoid double-booking. A 14-day free trial is available, and the site states no credit card is required to start.
How calendar sync works
The model is "set-and-forget." Once a sync is created, the service keeps copying events for you in real time, including free/busy times across your calendars.
The basic flow:
- Connect your Google, Outlook, or iCloud calendars.
- Choose a source and a target — the calendar events are copied from, and the one they're copied to.
- Pick a direction — one-way (mirror events from source to target only) or two-way (events mirror both ways).
- Done — the service copies every upcoming event automatically.
Key capabilities
| Capability | What it means |
|---|---|
| One-way or two-way sync | Choose whether calendars mirror events both ways or only copy from one to another |
| Multi-way direction | Sync direction is entirely up to you |
| Privacy controls | Hide the details of any field in the copied event — title, description, location, and more — behind a simple "Busy" block |
| Unlimited events | Every plan syncs an unlimited number of events across an unlimited number of calendars |
| Data use | The site states your data is only used to copy events between your calendars, nothing else |
Who it's for
The common thread in user reviews is managing several schedules at once. One reviewer describes running two small businesses, being active in their church, and managing a household — and using the sync to avoid overbooking themselves. Another needed to get an Outlook calendar showing up in Google Calendar on both desktop and phone after a free workaround failed. A third was trying to sync a shared webcal with a personal iCloud calendar.
If your problem is "my events live in more than one calendar system and I keep missing or double-booking things," that's the scenario this service targets. If you only ever use a single calendar, there's nothing to sync.
Privacy behavior worth knowing
The privacy feature is the one most likely to matter if you share calendars with others. Instead of copying an event's title, description, or location into the target calendar, you can replace those fields with a plain "Busy" block. That way a colleague or family member viewing the target calendar sees that you're occupied without seeing what the event actually is. You choose which fields to hide.
What the reviews say
The site cites ratings from real users: 4.9 on Capterra (120+ reviews), 4.9 on GetApp (52+ reviews), and 4.6 on the Google Workspace Marketplace (21K+ installs), with users described as "professionals around the world" and customers "since 2019."
Two recurring themes in the quoted reviews: it works across desktop and phone, and it solved a sync that free alternatives couldn't. One reviewer specifically notes a free method failed to show up on their phone calendar, while this one "did sync seamlessly with both desktop and phone Google calendar."
Getting started
Start a 14-day free trial from the site — the page states no credit card is required. From there, connect your calendars, create your first sync by choosing source, target, and direction, and decide whether to hide any event fields behind a "Busy" block. If you're unsure about direction, start one-way from your busiest calendar into the others; you can change it later.