2calendars vs. SyncThemCalendars: two close cousins, compared

Of all the tools people compare 2calendars to, SyncThemCalendars is the closest cousin. Both are built around the same core idea: copy your free/busy time between calendars automatically and in real time, with the option to hide everything behind a “Busy” block. If you’re choosing between the two, the differences come down to provider support, track record, and how each handles pricing, not the underlying approach.

SyncThemCalendars vs. 2calendars at a glance

Dimension	2calendars	SyncThemCalendars
Real-time sync	Yes, mirrors within seconds	Yes, “copy your free/busy times across your calendars in real time”
Sync direction	One-way ×2 (independent one-way legs)	One-way or two-way, your choice
Privacy default	”Busy” block by default, opt in to full detail, per connection	Can hide title, description, location, and more behind a “Busy” block
Providers	Google Calendar only	Google, Outlook, Apple iCloud
Multiple accounts	Yes, any number of Google accounts	Unlimited calendars
Free tier	Yes, 1 connection, forever free, no credit card	No permanent free tier, 14-day free trial, no credit card, paid after
Price	Free · Pro $9/mo · Business $19/mo	$3.99-$17.99/mo, yearly saves 20%
Category	Dedicated Google-to-Google sync	Dedicated multi-provider sync

When SyncThemCalendars is the better choice

If your calendars aren’t all on Google, say Outlook at work and iCloud on your phone, SyncThemCalendars covers that ground and 2calendars doesn’t, since 2calendars is Google-only. Someone who splits their working life between a corporate Outlook account and a personal Apple ecosystem simply isn’t a fit for a Google-only tool, no matter how good its privacy defaults are; SyncThemCalendars’ three-provider support is the actual requirement there, and its unlimited-calendars ceiling means that requirement scales past two accounts without needing a higher tier.

SyncThemCalendars also has a longer track record: it’s been running since 2019, and its own site cites strong third-party ratings (Capterra 4.9 from 120+ reviews, GetApp 4.9 from 52+, and 4.6 from 21,000+ installs on the Google Workspace Marketplace). For someone who weighs “how long has this company been operating and how many other people vouch for it” heavily, understandable, since a sync tool needs write access to your calendar, that history is a real point in its favor over a newer entrant. Its entry-level paid plan is also cheaper on paper, starting at $3.99/month for 5 syncs, and setup is billed as roughly a 2-minute process, so if you’re comfortable paying a small amount from day one rather than starting on a free tier, the total cost for a handful of calendars can undercut a Pro-tier competitor. If cross-provider coverage, a longer operating history, or that lower entry price matters more to you than a permanent free plan, SyncThemCalendars is a solid, purpose-built choice.

Where 2calendars fits

The honest difference isn’t that 2calendars does the core job differently; both tools can mirror free/busy time in real time behind a “Busy” block, and neither claims to be anything more exotic than that. The difference is that 2calendars is free where SyncThemCalendars is trial-then-paid. Every plan on SyncThemCalendars requires payment after a 14-day trial; 2calendars’ Free tier (1 sync connection) has no expiration and no credit card requirement at all.

Think of a freelancer running two Google accounts, one for a primary client relationship, one personal, who just wants each side to silently reflect the other’s busy time so they never get double-booked between a client call and a personal appointment. That’s a single connection, no team features, no multi-provider need. For exactly that shape of problem, paying a monthly subscription to a trial-then-paid tool is optional overhead; 2calendars’ Free tier handles it at no cost, indefinitely, and if that freelancer later picks up a second client’s Google account or two, the Pro tier’s 6 connections cover the growth without a per-sync add-on fee.

2calendars also adds health monitoring that flags a broken connection before you notice it yourself, and keeps sync direction and privacy settings independently configurable per connection, so a work-to-personal leg can show full details while the personal-to-work leg stays a plain “Busy” block. If your entire world is Google Calendar and you’d rather not pay anything to keep two accounts in sync, 2calendars is the more direct fit.

Want the full mechanics of how the mirroring works? See our guide to syncing two Google Calendars, or browse the best Google Calendar sync tools for a wider comparison.

Ready to try the free, Google-only option? Start free, one connection, no credit card, no trial clock.