Comparison · Calendar apps
Calendar vs Proton Calendar: which is better in 2026?
Calendar ranks higher in our list of calendar apps (#2 against #5, score 91.0 against 85.5).
Choose Calendar if you want
Apple users who want a built-in calendar.
Built into macOS and iOS and syncs iCloud and Google accounts with no extra install. It runs only on Apple devices, and its scheduling tools are simpler than Fantastical's.
Choose Proton Calendar if you want
Privacy-focused calendars inside Proton's suite.
A calendar from the Proton privacy suite, with apps on six systems and a free account. It has fewer third-party integrations than Google Calendar, so it suits people who put privacy first.
The main differences
- Only Proton Calendar runs on Linux.
- Only Proton Calendar runs on Windows.
- Only Proton Calendar runs on Android.
- Only Proton Calendar runs on Web.
- Calendar is free; Proton Calendar is free plan, paid upgrades.
Side by side
 Calendar |  Proton Calendar | |
|---|---|---|
| Score | 91.0 | 85.5 |
| Rank in list | #2 of 6 | #5 of 6 |
| Price | FreeIncluded with macOS and iOS at no extra charge | Free plan, paid upgradesFree account; paid Proton plans add more features |
| Free to use | Yes | Yes |
| Open source | No | No |
| Platforms | macOSiOSmacOS, iOS | iOSAndroidmacOSWindowsLinuxWebiOS, Android, macOS, Windows, Linux, Web |
| Made by | Apple | Proton |
| Where events are kept | iCloud and added accounts | Proton's servers |
| Desktop app | Yes, built in | Yes |
| Best for | Apple users who want a built-in calendar | Privacy-focused calendars inside Proton's suite |
| Strengths |
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| Limits |
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| Links | Visit site | Visit site |
Questions about Calendar vs Proton Calendar
- Is Calendar better than Proton Calendar?
- Calendar ranks higher in our list of calendar apps (#2 against #5, score 91.0 against 85.5). Calendar is best for: apple users who want a built-in calendar. Proton Calendar is best for: privacy-focused calendars inside Proton's suite.
- Which is cheaper, Calendar or Proton Calendar?
- Calendar: Included with macOS and iOS at no extra charge. Proton Calendar: Free account; paid Proton plans add more features.
- Do Calendar and Proton Calendar run on the same platforms?
- Calendar supports macOS, iOS. Proton Calendar supports iOS, Android, macOS, Windows, Linux, Web.