Proton Calendar reviews
Proton Calendar's iPhone and iPad app averages 4.1 out of 5 from 1,507 ratings on the App Store in the United States, as read on Oct 5, 2026.
The rating
4.1
out of 5 for the iPhone and iPad app
- 5 stars58%
- 4 stars14%
- 3 stars13%
- 2 stars7%
- 1 star8%
1,507 ratings on the App Store in the United States, read Oct 5, 2026. It rates the app, not everything the product does. See the listing
We have not yet read enough reviews of Proton Calendar to say what people praise and criticise. The links below go to where the reviews are.
Check for yourself
- App Store listingEvery rating and review, at the source
- G2Reviews from people who use it at work
- RedditThreads where people discuss it
- Hacker NewsDiscussions among developers
These open each site’s own pages. Nothing on this page is copied from G2 or Reddit.
What Proton Calendar's own pages show
Suits
- People who want event details kept unreadable to the provider
- Existing Proton Mail users who want invitations handled in the inbox
- Privacy-focused organizations standardizing on Proton's business suite
Limits worth knowing
- Proton Free allows 3 personal calendars; Mail Plus and higher plans allow 25.
- Calendar sharing and booking pages need a paid plan, and Mail Plus and Proton Unlimited include only 1 booking page.
- Calendar has no subscription of its own: paid features come with Mail Plus, Proton Unlimited or a business plan.
- Desktop use is through the Proton Mail app for Mac, Windows and Linux, a 14-day trial on free accounts; the Linux app is labeled beta.
Read from the vendor’s pages, not from reviews. The tool page lists them.
Common questions
How is Proton Calendar rated?
Proton Calendar's iPhone and iPad app averages 4.1 out of 5 from 1,507 ratings on the App Store in the United States, as read on Oct 5, 2026. That is the store's rating of the app, not a score from ToolGPA.
Are these ToolGPA's own reviews of Proton Calendar?
No. This page reports what other people say. Any rating shown is the store's, and any praise or complaint listed is a theme from public reviews and discussions, summarised in our words with a link to where it was said. Where ToolGPA has reviewed Proton Calendar itself, that review and its grades are on Proton Calendar's main page.
Where can I read more reviews of Proton Calendar?
This page links to Proton Calendar's App Store listing where it has one, and to searches for it on G2, Reddit and Hacker News, so you can read what people wrote in full.