Every spot is taken. Join the waitlist for the next opening.
See all your calendars
in one place.
View your Outlook, Google, Apple, and other calendars together in one clear, read only calendar.
Free and paid spots are full. Join the waitlist for the next opening.
- Extension: calendar information stays on this device
- Optional web app: Cloud Sync stores only the calendar copies you choose
- Read only by design
Mini sample ready.
Conflicts
2 overlaps across your calendars:
Simple from the start
Three steps. No calendar migration.
- 1
Get your invite
Join the waitlist. We will email you when a free or paid spot opens.
- 2
Choose calendars
Use supported signed in Outlook or Google tabs, plus Apple or ICS calendars.
- 3
See one schedule
Check day, week, or month without changing the original calendars.
What manyCalendars does
The calendar view you wish work gave you.
The browser extension is the main product and keeps calendar information on this device. The optional web app works only when you choose Cloud Sync.
One read only view
See supported calendars together without editing the originals.
Day, week, and month
Move between the views you already understand.
Conflicts and time zones
Spot overlaps and keep local or client times visible.
Privacy mode masks event names
Turn event titles into “Busy” if privacy is needed. Source colors stay visible so you can still read your day.
manyCalendars is not limited to Outlook. It supports selected Outlook Web and Google Calendar tabs. Apple, Google, Outlook, and other calendars can connect when they provide a standard ICS feed or file. You can also create a local manual calendar.
Every method is read only and starts with a calendar you choose. It reads information your browser or calendar file can already access. It does not edit the original calendar.
- PrimaryLocal browser bridge
The extension runs in your browser and reads the supported calendar information already available to a signed in Outlook Web or Google Calendar page. Your provider login and browser session stay in your browser.
- StandardICS subscription feed
Add a normal
https://orwebcal://feed from Apple, Google, Outlook, or another provider. The extension checks that feed for read only updates. - SupportedA calendar tab you choose
Choose an open Outlook Web or Google Calendar tab. The bridge remembers the correct browser session for later refreshes. You never give manyCalendars your calendar password.
- FallbackPassive page data reading
When a supported calendar sends data to its own open page, the extension can read a copy of that data. It does not replay the request, replace the response, or send commands back to the calendar provider.
- Experimental fallbackVisible week or month check
As a last resort, the bridge checks the calendar view already visible to you. If it cannot verify the full date range, saved dates outside that view are protected instead of being deleted.
- ManualICS file import
Open or drop an
.icscalendar file. manyCalendars reads the file locally on your device. - ManualManual calendar
Create a local calendar and add events yourself when there is no feed, file, or supported calendar tab to connect.
The same rule applies every time: manyCalendars looks at a calendar you opened or supplied, much like you would. It then combines those read only copies on your behalf.
Currently at capacity
Free and paid spots are full.
Join one waitlist. We will email you when either kind of spot opens. There is no payment today.
The core calendar.
- No account for the free extension
- No credit card
- Day, week, and month views
- Conflict warnings
- Privacy mode masks event names
Currently full. The core calendar remains free forever.
Optional conveniences.
- Cloud Sync and companion web access
- More automation and reminders
- Premium appearance options
- Additional export and sharing tools
- Final features and prices announced before payment
No founder price or purchase is being offered now.
Try our other products
Simple tools for busy schedules.
Calendar Converter is a separate product you can use today. More small tools are on the way.
Turn a photo, PDF, spreadsheet, CSV, or text file into a calendar file.
Open Calendar ConverterConvert a meeting time for another time zone.
Count days and find a date without doing the math yourself.
Quick answers
The important parts.
Why is there a waitlist?
manyCalendars is currently at capacity. Free and paid spots are already taken. Join the waitlist and we will email you when the next spot opens.
Does it change my calendars?
V1 is read only. It does not edit, delete, accept, or decline events in the original calendar.
Do I need an account?
The Free extension works without an account and keeps calendar information on your device. The optional web app requires sign in and Cloud Sync because it opens only the calendar copies you choose to sync.
How do I stop using it?
Remove a source inside manyCalendars, or uninstall the extension. If you later use Cloud Sync, turn it off or delete the cloud copies from your signed in web calendar.
Which calendars does it support?
Supported Outlook and Google calendar tabs, plus Apple and ICS files or feeds. Browser and company policy can still limit access.
We are currently full
Get the next opening email.
One waitlist for Free and paid spots. No payment today.