Secure mobile calendar

Proton Calendar is a free agenda app created by Proton Technologies, the brains behind ProtonMail. As the name suggests, this app provides a calendar for you to record events, appointments, and important moments of your life. It uses end-to-end encryption to keep all personal information secure. Moreover, it syncs across devices, allowing you to track your schedule anywhere. However, the app is currently in the beta stage. It is only available to paid ProtonMail and ProtonVPN users. 

What does Proton Calendar offer?

Proton Calendar offers the same secured service that ProtonMail and ProtonVPN offer. Like the other products of Proton Technologies, the app offers the same end-to-end encryption and other privacy advantages of Proton’s services. With this, no one but you can access all events and information from your account. Even the developers cannot spy on your activities and misuse your data. Moreover, the app also has no ads or trackers

More than security, the app also comes with features that will help you organized your appointments. It allows you to manage up to 10 calendars so you can separate events for work, family, and friends. You can set recurring events and even add multiple notifications for each of them. Additionally, the app allows you to schedule appointments in both local and foreign time zones. Like other calendar apps, this one lets users create, edit, view, and delete events. You can even add emojis to any event. 

As noted, the app allows you to syncs across devices. With this, all your schedules are tracked no matter which device you use to update them. More than that, it also lets you migrate your existing events from other calendar apps, so you don’t have to add them one by one. However, as mentioned, the app is still in the beta stage. Only those who use the paid ProtonMail and ProtonVPN can use it for now. 

Verdict

All in all, Proton Calendar is a recommended app if you are constantly using a calendar service. The app has all the tools you need to record your schedules and events. Moreover, it lets you better organize them by separating personal and work. Above all, it provides advanced security features to ensure that your data is safe.

  • Pros

    • Supports up to 10 calendars
    • End-to-end encryption
    • Syncs across devices
    • Dark mode and light mode
  • Cons

    • Only available to paid ProtonMail and ProtonVPN users
 0/7

App specs

Also available in other platforms

Program available in other languages



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Is Proton Calendar - Private and secure calendar safe?

100/100

Score result: Clean

This file passed a comprehensive security scan using VirusTotal technology. It is safe to download.

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Scan Info

Last scan
Saturday, October 25, 2025
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File Integrity

File
AF3DWBfkGpzLDiMDFxTo4XhicYUCStAldu_bYSMV_CIXaT0cwn6e6jSfp0bsFArXRII0puku1uhuq_T-w-MlTa6v5hcSXvHZk_ef9A_0Ls-tgu53OfvC-vRBHWR3h2F-2tto_wZr2k3h2c0l3-1UUgZDkC2cFde_dg
SHA256
ae84e75060e04a67b0426b838f48eee2c0c3b31d61961b55dad41caf1133b391
SHA1
451b14a033a4644660e2b1ae734851030cd1095f

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Proton Calendar - Private and secure calendar has been thoroughly scanned by our advanced security systems and verified by industry-leading partners. This file comes from the official developer and has passed all our security checks, showing no signs of viruses, malware, or spyware.