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Caltsu
Ultra-Simple Calendar Sync

Keep Your Calendars in Perfect Sync

Connect your calendars and choose how they stay in sync: one-way or multi-way, what to copy, and how private it should be. Nothing else.

Privacy first
Undo friendly
Works silently
Dead simple
Start Free TrialSee How It Works

Trusted by professionals who value their privacy

SOC 2 Type II
GDPR Compliant
256-bit SSL

From Personal Calendar

Team Meeting

2:00 PM - 3:30 PM

Doctor Appointment

10:00 AM - 11:00 AM

To Work Calendar (Busy Only)

Busy

2:00 PM - 3:30 PM

Busy

10:00 AM - 11:00 AM

Features

Everything you need. Nothing you don't.

We built exactly one thing: perfect calendar syncing. Every feature serves that mission.

Core Feature
One-way & Two-way Sync
Choose exactly how your calendars should stay in sync. Copy from A to B, or keep both perfectly aligned.
Privacy First
Privacy Controls
Share just busy blocks, titles only, or full details. Your sensitive meetings stay private.
Growing
Multiple Calendars
Connect Google Calendar today. Outlook and Apple Calendar coming soon.
Peace of Mind
Undo Anything
Made a mistake? Undo the last 24 hours of changes with one click. No stress, no mess.
Fast
Real-time Updates
Changes sync instantly. Move a meeting? It updates everywhere automatically.
Smart
Duplicate Protection
Smart deduplication prevents the same event from appearing twice. It just works.
Quiet
Works Silently
Set it up once and forget about it. Only notifies you when something needs attention.
Secure
Safe by Default
Read-only first. We show you exactly what will change before writing anything.

Ready to keep your calendars perfectly in sync?

✓ 14-day free trial, no credit card required
How It Works

Three steps to perfect sync

No complex setup. No IT department needed. Just connect, configure, and you're done.

1
01

Connect Your Calendars

Sign in with Google to connect your calendars. Takes 30 seconds.

  • Google Calendar (available now)
  • Outlook & Apple coming soon
  • Secure OAuth connection
2
02

Choose Your Sync Rules

Pick a recipe or go custom. We keep it simple with plain English.

  • Pre-made recipes
  • Privacy controls
  • One-way or multi-way
3
03

Let It Run Automatically

That's it. Your calendars stay in sync. We only notify you if something needs attention.

  • Works in background
  • Real-time updates
  • Undo anytime
Ready to get started?

14-day free trial • No credit card required • Cancel anytime

Pricing

Simple, honest pricing

Start free. No hidden fees. Cancel anytime. We believe in earning your trust, not trapping you.

MonthlyYearlySave 20%
Perfect for Testing
Free
€0/forever
Try it risk-free. Perfect for testing our sync magic.

✅ What's included:

  • 1 sync rule
  • 2 calendar connections
  • One-way sync only
  • Syncs every 3 hours
  • Basic privacy (Busy Only)
  • Community support

⚠️ Limitations:

  • • No multi-way sync
  • • No real-time updates
  • • No advanced privacy controls
  • • No RSVP or color filters

🚀 Upgrade when:

  • Hit the 1 rule limit? → Upgrade
  • Want multi-way sync? → Upgrade
  • Need real-time updates? → Upgrade
Best Value
Pro
€5/per month
billed annually
€6Save €12/year
Everything you need. Never think about syncing again.

✅ What's included:

  • Everything in Free +
  • Unlimited sync rules
  • Unlimited calendar connections
  • Two-way sync
  • Real-time sync
  • Advanced privacy controls
  • RSVP + color filters
  • 24-hour undo window
  • Email alerts for token expiry
  • Priority support

🎯 Perfect for:

  • • Power users with multiple calendars
  • • Teams needing automatic sync
  • • Anyone who wants "set it and forget it"
30-day money-back guarantee

Try risk-free. If you're not completely satisfied, we'll refund every penny.

FAQ

Questions? We have answers.

Everything you need to know about calendar sync. Can't find what you're looking for? Just email us.

Privacy & Security

How It Works

Billing & Support

Ready to sync your calendars perfectly?

Stop juggling multiple calendars. Start your free trial today and experience the peace of mind that comes with perfect calendar sync.

Start Free Trial
14-day free trial
No credit card required
Cancel anytime

Instant Setup

Connect your calendars in under 30 seconds

Privacy First

Your sensitive events stay completely private

Set & Forget

Works silently in the background, no maintenance