# Best Scheduling Tools for iCloud and Proton, 2026

> Seven scheduling tools compared on what they do when your calendar is Apple iCloud or Proton, which most booking tools do not read live. Prices and limits read on 2026-11-08.

By Kate B. · Published 2026-11-08 · Updated 2026-11-08 · 9 min read · https://innvesti.com/reports/best-scheduling-tools-icloud-proton-calendar-users-2026/

## Quick answer

There is no single best scheduling tool for iCloud and Proton users, because the two calendars behave differently: iCloud can be read through an app-specific password or a published feed, while Proton Calendar documents no CalDAV and offers only a one-way share link. WhenMeet is the one free tool here that handles both, SavvyCal has the most direct iCloud sync, and Proton's own booking pages suit people who stay inside Proton.

## Key takeaways

- We found no Proton-documented CalDAV support for Proton Calendar (third-party reports say there is none), so outside tools generally cannot read it live; the practical routes are Proton's own booking pages (paid plans only) or a read-only share link that Proton says can take up to eight hours to update (proton.me/support, read 2026-11-08).
- WhenMeet is the only tool here that is free and covers both providers: iCloud through a published read-only feed it checks about every 15 minutes, and Proton or no calendar through hand-marked free time with no account (whenmeet.me, read 2026-11-08).
- SavvyCal has the most direct iCloud support in this group: it connects with an app-specific password, picks up Apple Calendar changes within about a minute, and can write bookings to an iCloud calendar, but letting people book needs a paid plan from $10 per user per month billed annually.
- Calendly's own community staff said in September and October 2024 that iCloud synchronization was not supported and might no longer be available for new users; we found no later reversal, so check before relying on it.
- Google Meet links need the host's booking to land on a Google calendar and Teams links need a Microsoft work or school calendar, so an iCloud-only host usually has to supply a Zoom or other link by hand.

## Ranked

1. **WhenMeet** — Best free option that covers iCloud, Proton and no-calendar guests. https://whenmeet.me
2. **SavvyCal** — Best for live iCloud sync on booking links. https://savvycal.com
3. **Proton Calendar booking pages** — Best for people who stay entirely inside Proton. https://proton.me/support/calendar-appointment-scheduling
4. **Cal.com** — Best free plan with unlimited calendars, if you accept an app-specific password. https://cal.com
5. **OneCal** — Best for iCloud-only users who also want two-way calendar sync. https://www.onecal.io
6. **Fantastical Openings** — Best for people already living in the Apple ecosystem. https://flexibits.com/fantastical
7. **Calendly** — Familiar brand, but a weak fit for iCloud. https://calendly.com

## Comparison

| Tool | iCloud route | Proton route | Free to let people book? |
| --- | --- | --- | --- |
| WhenMeet | Published read-only feed, checked about every 15 min | Hand-marked free time, no account | Yes (up to 2 calendars) |
| SavvyCal | App-specific password, changes in about a minute | Not listed | No; Basic from $10 per user per month (annual) |
| Proton booking pages | Not confirmed on Proton's page | Native | No; paid Proton plan |
| Cal.com | App-specific password | None found | Yes (single user, unlimited calendars) |
| OneCal | Native, per vendor | None found | No; 2-week trial, then from $5 per user per month |
| Fantastical Openings | Supported account type | Not listed | No; Individual plan or higher |
| Calendly | Not supported for new users per 2024 staff posts | None found | Yes (one calendar connection) |

## FAQ

### Does Calendly work with iCloud Calendar?

Not reliably for new users. Calendly community staff said in September and October 2024 that iCloud synchronization was not supported and might no longer be available for new users, while saying existing users were not meant to lose it. We found no later reversal, so confirm in your own Calendly account before depending on it.

### Can I use a booking link with Proton Calendar?

Yes, but only through Proton's own booking pages on a paid Proton plan. Proton documents no CalDAV support for Proton Calendar (third-party reports say there is none), so outside booking tools generally cannot read it live. A read-only share link exists, and Proton says changes can take up to eight hours to appear.

### How does WhenMeet read an iCloud calendar?

You publish the calendar in Apple Calendar and add its public link in WhenMeet's settings. WhenMeet checks that read-only feed for busy times about every 15 minutes, so it is not a live free/busy connection like Google or Outlook.

### What is an app-specific password and why do iCloud tools need one?

It is a password you generate in your Apple Account for a single app. SavvyCal and Cal.com both state that your main Apple password will not work; revoking the app-specific password in your Apple Account disconnects the tool.

### Can an iCloud-only host get a Google Meet or Teams link on bookings?

Usually not. SavvyCal says Google Meet needs the booking on a Google calendar and Teams links need a Microsoft work or school calendar; Fantastical says the same for Google Meet and requires a professional or school account for Teams. An iCloud host typically adds a Zoom or other link by hand.

### Which option is free for iCloud users?

Cal.com's free single-user plan and WhenMeet's free plan both let people book at no cost. SavvyCal and Fantastical require paid plans to share booking links, and OneCal offers a two-week trial.

## How we evaluated

We opened each vendor's help and pricing pages on 2026-11-08 and recorded how the product reads iCloud and Proton calendars, what plan is needed to let people book, and any stated limits. We then cross-checked the Calendly and Proton claims with separate searches and the Calendly community thread. We did not connect real iCloud or Proton accounts to each tool, so the ranking reflects documented behavior; pricing and integrations change, so verify before buying.

- Documented route for reading an iCloud calendar and for a Proton calendar
- Whether the sync is live or delayed
- Cost to let other people book
- Meeting-link options when the host is not on Google or Microsoft
- Honest limits stated by the vendor

## Sources

- [WhenMeet, calendars, pricing and booking links](https://whenmeet.me)
- [Proton, how to use appointment scheduling in Proton Calendar](https://proton.me/support/calendar-appointment-scheduling)
- [Proton, share your calendar via a link](https://proton.me/support/share-calendar-via-link)
- [SavvyCal, iCloud and Apple Calendar](https://savvycal.com/icloud)
- [SavvyCal pricing](https://savvycal.com/pricing)
- [Cal.com, connect Apple Calendar](https://cal.com/help/en/articles/9929520-connect-apple-calendar-with-cal-com)
- [Cal.com pricing](https://cal.com/pricing)
- [OneCal, iCloud calendar scheduling](https://www.onecal.io/icloud-calendar-scheduling-app)
- [OneCal pricing](https://www.onecal.io/pricing)
- [Flexibits, Fantastical pricing and plans](https://flexibits.com/pricing?product=fantastical)
- [Flexibits, Fantastical Openings help](https://flexibits.com/fantastical/help/openings)
- [Calendly pricing](https://calendly.com/pricing)
- [Calendly community, iCloud calendar sync no longer possible](https://community.calendly.com/how-do-i-40/icloud-calendar-sync-no-longer-possible-2487)
- [OneCal, Calendly no longer supports iCloud Calendar](https://www.onecal.io/blog/calendly-no-longer-supports-icloud-calendar)