The one calendar

The chosen
one.

A calendar, chosen by you.

Six calendars in, you stop pretending one of them is the real one. chosencal mirrors them all into one warm place — Google, Outlook, Apple, Fastmail, Titan, any CalDAV. No more double-booking.

(Yes, we're aware of how the headline sounds. We meant it.)

Begin

Coming soon

App Store

Beta — request access

Google Play

hello@chosencal.com

Synced 4 calendars2s ago
healthy
CoreJune 2026
Product reviewGoogle Calendar
Investor syncMicrosoft Outlook
Deep workFastmail CalDAV

Speaks the calendars you actually use

Google Calendar
Microsoft Outlook
Apple iCloud
Fastmail
Titan
mailbox.org
Posteo
Radicale
Baikal
Nextcloud
ProtonMail Bridge
Any CalDAV server
Google Calendar
Microsoft Outlook
Apple iCloud
Fastmail
Titan
mailbox.org
Posteo
Radicale
Baikal
Nextcloud
ProtonMail Bridge
Any CalDAV server

Features

Everything the others
won't build.

Multi-provider sync, mutual scheduling, and an AI that actually learns when you take meetings.

Multi-provider sync

Every account.
Every protocol.

Google Calendar, Microsoft Graph, Apple iCloud, raw CalDAV. The providers other tools ignore — Fastmail, Titan, Baikal, Radicale, mailbox.org, Posteo — all first-class.

GoogleOutlookAppleFastmailTitanCalDAV

Mirroring

Reschedule once.

Every busy block updates everywhere — automatically.

Slots

Booking links that know.

Respects every connected calendar. Not just one.

⊹ CoInside

An AI that learns when you actually take calls.

When both people use chosencal, CoInside proposes mutually-good times based on real meeting history. No public availability sharing. No wall of slots. Just better answers.

  • ✦Learns from your last 90 days of meetings
  • ✦Respects both people's preferred windows
  • ✦Penalizes back-to-back stacks for breathing room
  • ✦Works across timezones automatically

How we compare

Built for the people they ignore.

The incumbents skip CalDAV and skip mutual scheduling. We built the tool for the rest of us.

chosencalOneCalCalendlyReclaim
Google Calendar✓✓✓
Microsoft Outlook✓✓✓
Apple iCloud✓✓—
Fastmail · Titan · CalDAV———
Mutual scheduling———
Auto-learned preferences——✓
AI suggested times——✓
Booking links✓✓—
Real-time sync✓—✓
No telemetry———

How it grows

Connect once. Stay synced.

Five minutes to set up. No Zapier, no scripts, no MCP servers. Sign in and pick which calendar holds your life.

i.

Connect every account

Sign in with Google or Microsoft to import your accounts in one click. Add CalDAV providers — Fastmail, Titan, Apple, Radicale — with username and password.

ii.

Pick your Core

One calendar becomes your unified hub. Every event from every other source mirrors here, so you only have one place to look.

iii.

Share your Slots link

A booking page that respects every connected calendar. Free for both parties to use. CoInside kicks in if you're both chosencal users.

Stop saying “let me check my other calendar.”

Five minutes to set up. Five accounts deep. Free to try.

Pricing

Free to start.
Simple when you grow.

No artificial limits. No upsell screens. Cancel anytime.

Free

$0

forever, no card needed

  • 2 connected calendars
  • 1 Slots booking link
  • 1 Chosen person
  • 60-second sync
  • Event create, move, delete
  • Day / week / month views
Get started
Most popular

Solo

$9

/mo

per month

  • 5 connected calendars
  • 3 Slots booking links
  • 3 Chosen people
  • 20-second sync
  • CoInside AI scheduling
  • Event details & meeting links
  • Calendar rename
Start free trial

Pro

$19

/mo

per month

  • Unlimited calendars
  • Unlimited Slots links
  • Unlimited Chosen people
  • Real-time sync (push)
  • Custom booking branding
  • Webhook integrations
  • Priority support
Start free trial

All prices in USD. Annual billing saves 20%. Need a team plan? Get in touch.

Frequently asked

Questions, answered.

How is chosencal different from OneCal?+

OneCal is focused on Google, Outlook, and Apple — and it doesn't do CalDAV. chosencal supports every CalDAV provider (Fastmail, Titan, Radicale, mailbox.org…), and has CoInside — an AI suggester for mutual scheduling between chosencal users. It's built for the people OneCal ignores.

Why does it look like a leather notebook instead of a SaaS app?+

Because every other calendar tool looks the same — clean white, sans-serif, blue accents. We wanted chosencal to feel like a place, not an interface. Warm, considered, made by humans for humans. The design is opinionated on purpose.

Is my calendar data secure?+

OAuth tokens are encrypted at rest, we don't read event content beyond what's needed for sync, and we have zero telemetry.

Will CoInside work if the other person isn't a chosencal user?+

No — CoInside requires both sides on chosencal so it can intersect availability and learn from both calendars. If the other person isn't a user, they get the standard Slots booking page (just like Calendly), which still respects every one of YOUR connected calendars.