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Best Protonmail Calendar Apps

197+ iOS apps curated and reviewed

4.6 avg rating
19 free apps
Updated May 2026

Out of 197+ protonmail calendar apps on iOS, 19 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Top Picks for Protonmail Calendar

Proton Calendar: Secure Events#1

Proton Calendar: Secure Events by Proton AG

Keep your schedule private
Editor's Choice
📊 Productivity
4.0😐(1.3K 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

A secure calendar application that prioritizes user privacy by offering end-to-end encryption for events and invites. Keep your schedule organized and private with features like multiple reminders, recurring events, and synchronization across devices. Built by scientists and engineers from CERN and MIT, Proton Calendar is ad-free and funded by users, not advertisers. Join the privacy-focused community today.

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 Mail - Encrypted Email#2

Proton Mail - Encrypted Email by Proton AG

Fast, private & secure mail
Strong Contender
📊 Productivity
4.7😊(43K ratings)
FreeIn-App Purchases
#82in Productivity
Proton Mail - Encrypted Email screenshot 1
Proton Mail - Encrypted Email screenshot 2
Proton Mail - Encrypted Email screenshot 3
Proton Mail - Encrypted Email screenshot 4
Proton Mail - Encrypted Email screenshot 5
Proton Mail - Encrypted Email screenshot 6

A secure email platform that prioritizes user privacy and data protection through encryption features. Send and receive private emails with confidence.

What We Love

  • 🚀 Smooth performance
  • 🔒 Excellent security and privacy
  • 👍 Clean and intuitive interface
  • 💡 Expanding ecosystem of Proton services

Room to Improve

  • 🐛 Occasional crashes and bugs
  • ⏱️ Slow email loading times
  • 📝 Lacking advanced email management features
Proton Pass - Password Manager#3

Proton Pass - Password Manager by Proton AG

Secure end-to-end encryption
Worth Considering
📊 Productivity
4.8😐(485 ratings)
FreeIn-App Purchases
Proton Pass - Password Manager screenshot 1
Proton Pass - Password Manager screenshot 2
Proton Pass - Password Manager screenshot 3
Proton Pass - Password Manager screenshot 4
Proton Pass - Password Manager screenshot 5
Proton Pass - Password Manager screenshot 6

Proton Pass is a secure, open-source password manager developed by CERN scientists. It offers end-to-end encryption, unlimited password storage, autofill logins, and 2FA code generation. Safeguard your online identity with this free and privacy-focused app available on all devices.

What We Love

  • 🚀 Decent password manager
  • 🔒 Secure and encrypted
  • 👍 Integrated email alias feature
  • 👍 Competitive pricing

Room to Improve

  • 🐛 Autofill issues
  • 🐛 Logging out issues
  • 🐛 Buggy and unreliable

More Protonmail Calendar apps to explore

4
Microsoft Outlook
Microsoft Outlook
Microsoft Outlook
Secure Email, Calendar & Files
Free

Get organized and stay connected with our secure email and calendar application. Manage your schedule, emails, and contacts effortlessly on any device. Download now for seamless productivity.

📊 Productivity
(9M)
5
One Calendar
One Calendar
One Calendar
All calendars in ONE place!
Free

Access all your calendars from Google, Outlook, iCloud, and more in one convenient place with easy-to-read overviews and management of appointments and events on all platforms. Simplify your calendar management today!

📊 Productivity
(20K)
6
Mail: Email, Cloud, Calendar
Mail: Email, Cloud, Calendar
Mail: Email, Cloud, Calendar
Tackle your inbox email!
Free

An efficient and versatile mail app for iPhone, iPad, and iPod Touch supporting various email services with features like multiple account support, full synchronization, personalized spam filter, push notifications, mail caching, contact integration, and quick actions. Stay connected and organized with this user-friendly email application.

📊 Productivity
(1.7M)
7
Yahoo Mail: Your Email & Inbox
Yahoo Mail: Your Email & Inbox
Yahoo Mail: Your Email & Inbox
Secure, Fast, Simple
Free

A streamlined email app that organizes your inbox from various providers like Gmail and Outlook, offering features like one-tap unsubscribe and quick email sorting to help you stay organized and efficient. declutter your inbox, and stay on top of important emails with ease. Sign up now for a smoother email experience.

📊 Productivity
(4.7M)
8
Proton Drive: Cloud Storage
Proton Drive: Cloud Storage
Proton Drive: Cloud Storage
Private files & photos backup
Free

"Get secure and convenient cloud storage for all your files with our easy-to-use application. Safely store, access, and share your important documents anytime, anywhere."

📊 Productivity
(965)
9
Fastmail – Email & Calendar
Fastmail – Email & Calendar
Fastmail – Email & Calendar
Privacy-first email with more
Free

Fastmail is an efficient email application that offers fast and secure email services with advanced features like customizable folders, powerful search options, and easy-to-use interface. Get organized and stay connected with Fastmail today.

📊 Productivity
(561)
10
Teamup Calendar
Teamup Calendar
Teamup Calendar
The Shared Calendar for Groups
Free

Teamup Calendar is a shared calendar application for groups that helps organize people, schedule work, and share events efficiently. It offers multiple sub-calendars, customizable fields, event attachments, and powerful timezone support. Visit https://www.teamup.com to get started and learn more.

💼 Business
(1.5K)
11
Calendar Op.2
Calendar Op.2
Calendar Op.2
Handy simple calendar
Free

Calendar Op.2 is a user-friendly calendar app that helps you organize your daily schedule effortlessly. Seamlessly integrates with the iOS calendar and offers a clean interface for easy use. Get organized and stay on top of your tasks with Calendar Op.2!

📊 Productivity
(13K)
12
Tiny Calendar Pro
Tiny Calendar Pro
Tiny Calendar Pro
Calendar App: Planner & Tasks
$19.99

A versatile calendar app designed to streamline your planning and organization needs. Sync schedules, set reminders, and manage events effortlessly. Stay on top of your agenda with Tiny Calendar Pro!

📊 Productivity
(2.3K)
13
AdGuard Ad Blocker for Safari
AdGuard Ad Blocker for Safari
AdGuard Ad Blocker for Safari
Ad Blocker, Browser Security
Free

Harness the power of AdGuard — an efficient ad-blocking tool designed to enhance your browsing experience. Say goodbye to intrusive ads and enjoy a faster, cleaner online journey. Try AdGuard now for a seamless browsing experience!

🔧 Utilities
(17K)
14
Calendar
Calendar
Calendar
by Apple Distribution International
Free

Stay organized and effortlessly manage your schedule with this calendar application. Easily create separate calendars for different aspects of your life, view events across various accounts in one place, and enjoy synchronization across all your devices. Schedule events, receive notifications, and simplify meeting invitations with this all-in-one calendar tool.

📊 Productivity
(1.5M)
15
PocketLife Calendar
PocketLife Calendar
PocketLife Calendar
Calendar Organizer & Reminders
Free

PocketLife Calendar is a versatile calendar organizer that helps you stay organized and never miss an important event. Manage your schedule effectively with ease. Download now for effortless event planning!

📊 Productivity
(41K)
16
Calendars: Schedule Planner
Calendars: Schedule Planner
Calendars: Schedule Planner
Reminder・Tasks Organizer・To Do
Free

Plan your day, schedule events, set reminders, and stay organized with this versatile calendar and planner app. Manage tasks, appointments, and to-do lists easily in one place. Download now and take control of your schedule!

📊 Productivity
(120K)
17
Calendar ·
Calendar ·
Calendar ·
Planner Organizer & Agenda
Free

Plan, organize, and manage your schedule effectively with this all-in-one planner and organizer app. Stay on top of your tasks, events, and appointments effortlessly. Download now to boost your productivity!

📊 Productivity
(59K)
18
Simple Calendar・Schedule app
Simple Calendar・Schedule app
Simple Calendar・Schedule app
simple and cool calendar app
Free

A simple and cool calendar app designed for those who prefer straightforward scheduling without complex features. With a focus on simplicity and a beautiful design, it offers an easy-to-use interface for managing appointments and tasks stress-free.

📊 Productivity
(1.9K)
19
Tiny Calendar: Planner & Tasks
Tiny Calendar: Planner & Tasks
Tiny Calendar: Planner & Tasks
Agenda, Organizer & Reminders
Free

Stay organized and on top of your schedule with this intuitive planner app. Easily manage your events, tasks, and appointments all in one place. Download now to simplify your day-to-day planning!

📊 Productivity
(20K)
20
Week Calendar - Smart Planner
Week Calendar - Smart Planner
Week Calendar - Smart Planner
Sync Agenda Tasks & Reminders
Free

Organize your schedule efficiently with a smart planner that synchronizes tasks and events seamlessly. Stay on top of your agenda effortlessly.

📊 Productivity
(10K)