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Best Proton Calendar Apps

250+ iOS apps curated and reviewed

4.4 avg rating
20 free apps
Updated August 2026

From beginner-friendly picks to power-user tools, our proton calendar list covers 250+ iPhone apps updated through August 2026. Compare ratings, prices, and screenshots in one place.

Compare top Proton Calendar Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Proton Calendar: Secure EventsProton Calendar: Secure EventsFree4.0★ (1.4K)NoNoAug 2026
2Proton Drive: Cloud StorageProton Drive: Cloud StorageFree4.1★ (1.1K)NoYesAug 2026
3Proton AuthenticatorProton AuthenticatorFree4.4★ (242)NoNoAug 2026
4Proton Mail - Encrypted EmailProton Mail - Encrypted EmailFree4.8★ (47K)NoYesAug 2026
5Proton Pass - Password ManagerProton Pass - Password ManagerFree4.8★ (7.5K)NoYesAug 2026
6Proton Wallet: Secure BitcoinProton Wallet: Secure BitcoinFree4.8★ (239)NoNoAug 2026
7Proton VPN: Fast & SecureProton VPN: Fast & SecureFree4.6★ (93K)NoYesAug 2026
8Lumo AI by ProtonLumo AI by ProtonFree3.8★ (485)NoYesAug 2026

Top Picks for Proton Calendar

Proton Calendar: Secure Events#1

Proton Calendar: Secure Events by Proton AG

Keep your schedule private
Editor's Choice
📊 Productivity
4.0😐(1.4K ratings)
FreeIn-App Purchases
Proton Calendar: Secure Events screenshot 1
Proton Calendar: Secure Events screenshot 2
Proton Calendar: Secure Events screenshot 3
Proton Calendar: Secure Events screenshot 4
Proton Calendar: Secure Events screenshot 5
Proton Calendar: Secure Events screenshot 6

This app helps you manage your schedule with privacy in mind. It offers various viewing options, reminders, and recurring event creation. All your data is protected by end-to-end encryption and strict Swiss privacy laws, ensuring your personal information is not tracked or harvested.

What We Love

  • 🚀 Intuitive interface
  • 🔒 Secure and private
  • 👍 Good integration with Proton suite
  • 👍 Visually appealing design

Room to Improve

  • 🐛 Slow performance and crashes
  • 🔍 Lacking search functionality
  • 📅 Missing advanced calendar views (week, month)
Proton Drive: Cloud Storage#2

Proton Drive: Cloud Storage by Proton AG

Private files & photos backup
Strong Contender
📊 Productivity
4.1😐(1.1K ratings)
FreeIn-App Purchases
Proton Drive: Cloud Storage screenshot 1
Proton Drive: Cloud Storage screenshot 2
Proton Drive: Cloud Storage screenshot 3
Proton Drive: Cloud Storage screenshot 4
Proton Drive: Cloud Storage screenshot 5
Proton Drive: Cloud Storage screenshot 6

Securely store and back up your files and photos with end-to-end encryption. Access your content across devices, share securely with password protection, and enjoy peace of mind with Swiss privacy laws. Offers free storage with upgrade options.

What We Love

  • 🚀 Fast and efficient
  • 🔒 Secure and private
  • 👍 Simple and intuitive UI
  • 💡 Integrated with iOS Files app

Room to Improve

  • 🐛 Buggy and unreliable
  • 🔋 High battery consumption
  • 📥 Slow upload/download speeds
Proton Authenticator#3

Proton Authenticator by Proton AG

Secure 2FA Authenticator
Worth Considering
📊 Productivity
4.4😊(242 ratings)
Free
Proton Authenticator screenshot 1
Proton Authenticator screenshot 2
Proton Authenticator screenshot 3
Proton Authenticator screenshot 4

Securely manage your two-factor authentication codes with an open-source, end-to-end encrypted authenticator app. It offers seamless cross-device syncing, effortless import from other apps, and robust backup options, all protected by strict Swiss privacy laws. Take control of your digital security with a trusted and private solution.

What We Love

  • 🚀 Cross-platform support
  • 🔒 Secure cloud sync
  • 👍 Easy import from other authenticators
  • 🚀 Convenient 'next' feature for codes

Room to Improve

  • 🐛 Buggy UI (scrolling jitters, random sorting)
  • 👎 Lack of customization options (pin favorites, change icons)
  • 🐛 Sync/login issues on iPad

More Proton Calendar apps to explore

4
Proton Mail - Encrypted Email
Proton Mail - Encrypted Email
Proton Mail - Encrypted Email
Fast, private, secure inbox
Free

This encrypted email service from Switzerland prioritizes user privacy with end-to-end encryption. It offers robust security features to protect your communications from phishing, spam, and tracking, allowing you to manage your inbox with ease.

End-to-end encryptionPassword-protected emailsMultiple account support
📊 Productivity
(47K)
free with in-app purchases
5
Proton Pass - Password Manager
Proton Pass - Password Manager
Proton Pass - Password Manager
Secure end-to-end encryption
Free

Securely manage your online credentials with end-to-end encryption. This free password manager offers autofill, 2FA code generation, email alias creation, and data breach monitoring across all your devices. Protect your digital identity with robust Swiss privacy laws.

Autofill loginsStore unlimited passwordsGenerate 2FA codes
📊 Productivity
(7.5K)
free with in-app purchases
6
Proton Wallet: Secure Bitcoin
Proton Wallet: Secure Bitcoin
Proton Wallet: Secure Bitcoin
A safer way to hold Bitcoin
Free

This app provides a secure and user-friendly way to manage Bitcoin, giving users full control over their funds. It offers features like multi-device support, encrypted transactions, and a unique email-based sending option for enhanced privacy and ease of use.

Sole control of BTCIntuitive experience for newcomersSeamless multi-device support
💰 Finance
(239)
free
7
Proton VPN: Fast & Secure
Proton VPN: Fast & Secure
Proton VPN: Fast & Secure
Safe and unlimited proxy
Free

This app provides a secure, encrypted, and unlimited internet connection, protecting your privacy and unblocking content. It offers advanced security features and a strict no-logs policy, with both free and premium options available.

Unlimited data, no speed restrictionsStrict no-logs policyBypass geo restrictions
🔧 Utilities
(93K)
freemium
8
Lumo AI by Proton
Lumo AI by Proton
Lumo AI by Proton
Private Assistant from Europe
Free

This AI assistant prioritizes your privacy, offering help with productivity, curiosity, and staying informed. Developed by the team behind trusted encrypted services, it ensures your data remains secure.

Privacy-first AI assistantBoost productivitySatisfy curiosity
📊 Productivity
(485)
free with in-app purchases
9
Notion Calendar
Notion Calendar
Notion Calendar
For your work and life
Free

Manage your schedule and events with a unified view across multiple calendars. Integrate with your Notion workspace to link documents and projects directly to your events. Offers customizable widgets for quick access to upcoming appointments and event details.

Deep Google Calendar integrationConnect Notion docs and projectsMultiple time zone support
📊 Productivity
(7.2K)
free
10
Tuta Calendar: Secure Planner
Tuta Calendar: Secure Planner
Tuta Calendar: Secure Planner
Encrypted Events & Reminders
Free

This secure calendar app offers end-to-end encryption to protect your events and reminders. It features a user-friendly interface, cross-device syncing, and smart reminders, with a free plan and optional premium upgrades.

Quantum-safe end-to-end encryptionZero tracking and zero-knowledge architectureSecure event sharing
📊 Productivity
(156)
freemium
11
Teamup Calendar
Teamup Calendar
Teamup Calendar
The Shared Calendar for Groups
Free

This app facilitates efficient information sharing and task completion for groups through a shared calendar. It allows for organizing people, scheduling work, managing availability, and securely sharing events with teams or external parties.

View and update multiple sub-calendarsCentrally manage calendar via browserGranular access permissions
💼 Business
(9.3K)
freemium
12
NordVPN: VPN Fast & Secure
NordVPN: VPN Fast & Secure
NordVPN: VPN Fast & Secure
Safe & Quick VPN, Best Privacy
Free

Enhance your online privacy and security with a virtual private network. This app encrypts your internet traffic, shields your IP address, and protects your browsing from snoopers and cybercriminals. Enjoy fast, secure connections and access the internet with greater freedom.

Strong VPN encryptionThousands of VPN servers worldwideVPN auto-connect
🔧 Utilities
(697K)
subscription
13
Saturn Calendar
Saturn Calendar
Saturn Calendar
Manage and share your time
Free

This app is designed for students to manage complex school schedules, including rotating periods and group events. It simplifies planning with friends and classmates, allowing users to share schedules and coordinate activities easily. Stay organized for high school and college with features tailored to student life.

Rotating period supportBlock schedule managementSocial schedule sharing
📊 Productivity
(68K)
free
14
Calendar - 2026
Calendar - 2026
Calendar - 2026
2026 Calendar Planner,Reminder
Free

This daily planner and reminder app helps you organize tasks, meetings, and events with customizable views and notifications. It offers to-do lists, checklists, and the ability to add locations and notes to your schedule.

Daily to-do listsMultiple calendar views (day, week, month, year)Notification reminders
📊 Productivity
(7)
free with in-app purchases
15
Shamsi+ Calendar | تقویم پارسی
Shamsi+ Calendar | تقویم پارسی
Shamsi+ Calendar | تقویم پارسی
Persian Calendar |تقویم ایرانی
Free

This app offers a fast, lightweight, and beautifully designed Shamsi calendar with full Persian and Gregorian date support. It features customizable event selection, comprehensive event management, and modern, user-friendly widgets. Stay organized with its intuitive interface and updated holiday display.

Lightweight and fast performanceBeautifully designed widgetsModern and user-friendly interface
🔧 Utilities
(449)
free
16
Custom Holiday Calendar
Custom Holiday Calendar
Custom Holiday Calendar
Create Your Own Holidays
Free

Design your personal yearly calendar by adding custom holidays, work schedules, and special events. This app offers complete control over what days are marked, ideal for personal use or professional tracking.

Create custom holidaysAdd personal days offTrack work schedules
🔧 Utilities
(2.2K)
ad-supported
17
Calendarly: Calendar Wallpaper
Calendarly: Calendar Wallpaper
Calendarly: Calendar Wallpaper
Lock Screen Notes & Countdown
Free

Display your calendar directly on your Lock Screen as a live wallpaper. See your schedule instantly without opening any apps. Customize layouts, colors, and spacing for a personalized view.

Live calendar wallpaper on Lock ScreenAutomatic background updatesCustomizable layouts and colors
📊 Productivity
(19)
free with in-app purchases
18
Morgen Calendar & Planner
Morgen Calendar & Planner
Morgen Calendar & Planner
Calendars & Tasks in one app
Free

This app consolidates your calendars and tasks into a single, powerful productivity tool. Schedule meetings, manage to-dos, share your availability, and join virtual calls seamlessly, all from your mobile device. It syncs with your existing calendars and task managers for a unified workflow.

Consolidate all calendarsManage and schedule tasksShare scheduling links
📊 Productivity
(195)
free with in-app purchases
19
Calendar All-In-One Planner
Calendar All-In-One Planner
Calendar All-In-One Planner
Sync Agenda Tasks & Reminders
Free

Enhance your standard mobile calendar with advanced features for better organization. This app offers a clear overview, powerful reminder functions, and easy event management. Customize your schedule with color-coding, templates, and support for various calendar services.

Syncs iCloud, Exchange, Google calendarsDay, week, month, year viewsDrag and drop event relocation
📊 Productivity
(96)
free with in-app purchases
20
Simple Calendar・Schedule app
Simple Calendar・Schedule app
Simple Calendar・Schedule app
simple and cool calendar app
Free

This app offers a streamlined calendar experience, focusing on essential features for easy event management. It's designed for users who prefer simplicity and a clean interface over complex functionalities. Get organized with core calendar tools and helpful notifications.

Calendar viewEvent creationSearch functionality
📊 Productivity
(2.3K)
ad-supported

FAQ about Proton Calendar

What are the best proton calendar apps for iPhone?
Proton Calendar: Secure Events tops our proton calendar apps ranking as of August 2026, with a 4.0-star average from 1.4K App Store ratings, and it's free to download.
Yes — 20 of the top proton calendar apps we rank are free to download, including Proton Calendar: Secure Events and Proton Drive: Cloud Storage.
Proton Calendar: Secure Events has no ads and has no in-app purchases, according to its App Store listing as of August 2026.
We track 250+ proton calendar apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
Proton Calendar is a privacy-focused application designed to help you manage your schedule and events. It offers features like different viewing modes, the ability to view and reply to invites, and automatic addition of events from your email inbox. It ensures your schedule remains private and secure.
Your data is protected by the same end-to-end encryption used in Proton Mail. Event names, descriptions, and participants are stored with zero-access encryption, meaning even Proton cannot access your data. The app is also based in Switzerland, adhering to strict privacy laws.

Related searches

proton calendar: secure events