Proton Calendar vs Bitwarden Authenticator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Proton Calendar
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.
- Agenda and day view
- View and reply to invites
- Automatic event addition from email
- Light and dark mode
- Multiple reminders
- Recurring events
- Cross-device sync
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A calendar is a record of your life: Proton Calendar helps keep it private. Make the most of your time - See your upcoming events as you like with agenda or day view - View and reply to invites - Events and invites are automatically added to your calendar from your Proton Mail inbox - View your schedule in light or dark mode - Add multiple reminders for your events - Create recurring events on a daily, weekly, monthly, yearly, or custom basis - Keep your calendar in sync across all your devices Private by default - No ads, no trackers, and no data harvesting - We can’t spy on your calendar or misuse your data - Protected by the same end-to-end encryption used in Proton Mail - Event names, descriptions, and participants are stored with zero-access encryption - Based in Switzerland, all your data is protected by strict Swiss privacy laws People before profits - Funded by users, not advertisers — Privacy is our business model - Built by scientists and engineers who met at CERN and MIT and founded Proton Mail - Used by high-profile journalists and organizations globally What others say about Proton: “Proton has now made it stupid-easy to encrypt your schedule. Information about what you plan to do, where, and with whom, can be just as sensitive as the messages you send and receive.” Gizmodo Follow Proton on social media for all the latest news and offers: Facebook: /proton Twitter/X: @protonprivacy Reddit: /protonmail Instagram: /protonprivacy EULA: http://www.apple.com/legal/itunes/appstore/dev/stdeula
Bitwarden Authenticator
Generate time-based one-time passwords for two-factor authentication on any website or application. This tool provides an extra layer of security for your accounts, ensuring your identity is verified and sensitive data remains protected from unauthorized access.
- Generates 2FA verification codes
- Supports TOTP for universal compatibility
- Simple and intuitive interface
- Adds an extra layer of protection
- Backed by a trusted company
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New from Bitwarden, provider of the password manager trusted by millions, Bitwarden Authenticator generates verification codes for two-factor authentication, ensuring your identity is verified when you log into accounts. Using industry-standards, Bitwarden Authenticator supports any website or application that uses TOTP. ADD AN EXTRA LAYER OF PROTECTION Generate verification codes to ensure your identity is verified, keeping your sensitive data out of reach of imposters. UNIVERSAL COMPATIBILITY Bitwarden Authenticator uses industry standard methods for verification code generation, so it will work with any website or application that utilizes time-based one-time passwords. EASY TO USE A simple, intuitive design and straightforward interface makes it easy to start incorporating authentication into your digital life Bitwarden empowers organizations to secure passwords, developer secrets, and passkeys. Visit Bitwarden.com to learn more about Bitwarden Password Manager, Bitwarden Secrets Manager and Bitwarden Passwordless.dev!
Screenshots
Verdict
The clearest difference is rating: Proton Calendar at 4.1 against Bitwarden Authenticator's 3.4. Proton Calendar also leads on ratings volume (1.6K vs 96). Bitwarden Authenticator's advantage is in-app purchases (none vs 2) and update cadence (fortnightly vs every 5 weeks). On price, review sentiment, ads and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Proton Calendar sells 2 one-off in-app purchases. Bitwarden Authenticator asks for nothing beyond the download.
Proton Calendar holds the better App Store score, 4.1 against 3.4. That said, the two scores are not equally well evidenced: Proton Calendar has 1.6K ratings behind it against 96, so its average is the more settled of the two. Written reviews split almost evenly too, at 41% and 41% positive.
Proton Calendar ships an update every 5 weeks, Bitwarden Authenticator fortnightly. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.
| Parameter | Proton Calendar | Bitwarden Authenticator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (1.6K ratings) — better | 3.4 (96 ratings) |
| Positive reviews | 40.7% of reviews | 40.8% of reviews — better |
| Number of ratings | 1.6K — better | 96 |
| Update frequency | Every 5 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 185 MB | 76 MB |
| Age rating | 4+ | 4+ |
| Developer | Proton AG | Bitwarden Inc |
Customer experience
Proton Calendar
Bitwarden Authenticator
User reviews
Proton Calendar
From 1.6K App Store ratingsWhat 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)
- 🔗 Limited integration with other calendars
Bitwarden Authenticator
From 96 App Store ratingsWhat we love
- 👍 Good start
- 🚀 Supports export and import
- 🔒 Backed by a trusted company
- 💡 Dedicated authenticator app
Room to improve
- 🐛 Crashes on launch
- 🐛 Search function not working
- 🐛 Backup not working as expected
- 🐛 Compatibility issues with older devices
Bugs and requests
Proton Calendar
Reported bugs
3 issues- Issues with time zone settings
- Notifications not working reliably
- Inability to edit shared events
Requested features
5 requests- Widgets for quick access
- Ability to invite and share calendars with others
- Support for importing/exporting calendar data
- Customization options (colors, alerts, etc.)
- iPad-optimized version
Bitwarden Authenticator
Reported bugs
3 issues- Search results showing placeholder codes
- Backup not restoring codes after device restore
- Crashes after app updates
Requested features
5 requests- Add icons for services
- Allow rearranging of entries
- Implement iCloud/cloud sync
- Add Apple Watch support
- Require biometric authentication on each app open
In-app purchases
Proton Calendar
- Mail Plus (1 year)$59.99
- Proton Unlimited$149.99
Bitwarden Authenticator
No in-app purchases
Questions
Is Proton Calendar free?
Is Bitwarden Authenticator free?
Which has better reviews, Proton Calendar or Bitwarden Authenticator?
Do Proton Calendar or Bitwarden Authenticator have ads?
Which is updated more often, Proton Calendar or Bitwarden Authenticator?
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