Comparison

Encrypted Email vs Yubico Authenticator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Encrypted Email

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.

Highlights
  • End-to-end encryption
  • Password-protected emails
  • Multiple account support
  • Inbox organization (folders, labels)
  • Dark mode
  • Phishing and spam protection
Read full description

Proton Mail is the encrypted email app trusted by over 100 million people. Get a secure, private email address protected by end-to-end encryption, with no ads, no AI training and no inbox scanning. Based in Switzerland and protected by some of the world's strictest privacy laws. Your inbox, your rules. Why choose Proton Mail for secure email • Free encrypted email: create a free @proton.me or @protonmail.com email address • Password-protected emails: send encrypted emails to anyone, even people who don't use Proton • Spam, phishing and tracker protection: with built-in spam filters, phishing alerts and email tracker blocking • Organize your inbox: with folders, labels and simple swipe gestures • Offline mode: read, write and organize emails offline, and everything syncs when you're back online • Private categories: keep important emails in focus with automatic, private categories • Multiple accounts: switch between multiple Proton Mail accounts in one secure email app • Get up to 1 GB of free email storage, or up to 15 GB with Mail Plus Secure email with encryption Everything in your inbox is stored with zero-access and end-to-end encryption, emails between Proton users can only be read by you and your recipient. Proton Mail can't read or scan your messages. Our open-source apps use OpenPGP encryption and are independently audited. A private alternative to temp mail Need a temp mail address for a sign-up? Create up to 10 free hide-my-email aliases on the web. They forward to your inbox, keep your real email address private, and can be disabled or deleted at any time. Switch to secure email Easy Switch moves your email to your new secure inbox with no manual exporting or importing. Connect Gmail to use your Gmail address alongside your Proton email in one secure inbox, or set up auto-forwarding from as many Gmail accounts as you like. The Wall Street Journal: "Proton Mail offers encrypted email, which makes it virtually impossible for anyone to read it except the sender and the recipient." How can Proton Mail be free? We believe everyone deserves private email. Free accounts are funded by our community of paid subscribers. Upgrade for more email storage, more addresses and custom domains. Follow Proton for the latest news and offers: Facebook: /proton X: @protonprivacy Reddit: /protonmail Instagram: /protonprivacy Learn more: https://proton.me/mail Our open-source code: https://github.com/ProtonMail

About

Yubico Authenticator

Secure your online accounts with hardware-backed two-factor authentication. Store unique credentials on a physical security key, eliminating the need to store sensitive data on your mobile device. Generate verification codes without an internet connection for enhanced account protection.

Highlights
  • Hardware-backed security key storage
  • Touch or NFC authentication
  • USB-C support
  • Biometric unlock (FaceID/TouchID)
  • QR code setup
  • User presence verification
  • Smart Card support
Read full description

Store your unique credentials on a hardware-backed security key and take it wherever you go from mobile to desktop. No more storing sensitive secrets on your mobile phone, leaving your account vulnerable to takeovers. With the Yubico Authenticator you can raise the bar for security. * The Yubico Authenticator will work with any USB, Lightning, or NFC-enabled YubiKeys. * As iPads do not have NFC, they will only work through a Lightning or USB connection. The Yubico Authenticator generates a code used to verify your identity as you are logging into various services. No connectivity needed! Features include: Touch or NFC Authentication - Touch the YubiKey sensor or simply tap a YubiKey with NFC to a mobile phone that is NFC-enabled to store your credential on the YubiKey USB-C support - Connect the YubiKey 5Ci or any USB-C type YubiKey. When prompted, depending on the key, touch the contacts on the sides of the key or the golden ring on the top Biometric support - Experience greater convenience by unlocking your YubiKey with FaceID or TouchID Easy Setup - QR codes available from the services you wish to protect with strong authentication User Presence - New codes generated with just a touch or NFC tap of the YubiKey Compatible - Secure all the services currently compatible with other Authenticator apps Secure - Hardware-backed strong two-factor authentication with secret stored on the YubiKey, not on the mobile device Versatile - Support for multiple work and personal accounts Portable - Get the same set of codes across our other Yubico Authenticator apps for desktops as well as for all leading mobile platforms Flexible - Support for time-based and counter-based code generation Smart Card - Support for Apple's CryptoTokenKit Extension making it possible to use certificates stored on your YubiKey to authenticate with other apps and sites Experience security the modern way with the Yubico Authenticator. Visit yubico.com to learn more.

Screenshots

Encrypted Email4 screens
Yubico Authenticator4 screens

Verdict

The call

The clearest difference is rating: Encrypted Email at 4.8 against Yubico Authenticator's 3.7. Encrypted Email also leads on ratings volume (49K vs 286) and update cadence (every 11 days vs monthly). Yubico Authenticator's advantage is in-app purchases (none vs 6). On price, review sentiment, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Encrypted Email sells 6 in-app purchases, starting at $5.99 per month. Yubico Authenticator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Encrypted Email holds the better App Store score, 4.8 against 3.7. That said, the two scores are not equally well evidenced: Encrypted Email has 49K ratings behind it against 286, so its average is the more settled of the two. Written reviews point the same way: 47% of Encrypted Email's written reviews are positive against 43% of Yubico Authenticator's.

UpkeepUpdate frequency

Encrypted Email ships an update every 11 days, Yubico Authenticator monthly. Both last shipped on October 22, 2026.

Scorecard6 real differences · 5 level
Encrypted Email versus Yubico Authenticator: the parameters behind the verdict, then further details
ParameterEncrypted EmailYubico Authenticator
PriceFreeFree
Rating4.8 (49K ratings) — better3.7 (286 ratings)
Positive reviews46.7% of reviews — better42.5% of reviews
Number of ratings49K — better286
Update frequencyEvery 11 days — betterMonthly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#71 — better—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.216.0 — better
Further details — not scored
Size272 MB4 MB
Age rating4+4+
DeveloperProton AGYubico

Customer experience

Encrypted Email

All ratings49,380 ratings
Positive94.4%
Neutral2.1%
Negative3.4%
Written reviews1,679 reviews
Positive46.7%
Neutral13.6%
Negative39.7%

Yubico Authenticator

All ratings268 ratings
Positive64.9%
Neutral6.7%
Negative28.4%
Written reviews320 reviews
Positive42.5%
Neutral11.9%
Negative45.6%

User reviews

Encrypted Email

From 49K App Store ratings

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
  • 💰 Expensive paid plans

Yubico Authenticator

From 286 App Store ratings

What we love

  • 🚀 Works well with Yubikey
  • 🔒 Secure storage of OATH secrets
  • 👍 Simple and easy to use
  • 🚀 NFC support added

Room to improve

  • 🐛 NFC not working on some devices
  • 🐛 Clunky UI for password-protected keys
  • 🐛 Crashes and freezes reported
  • 🐛 Incompatible with some devices (iPad, older iPhones)

Bugs and requests

Encrypted Email

Reported bugs

3 issues
  • Login issues and lost email data
  • Unreliable push notifications
  • Inconsistent user experience between app and web

Requested features

4 requests
  • Conversation threading and email previews
  • Customizable notification sounds
  • Offline email access
  • Improved syncing across devices

Yubico Authenticator

Reported bugs

4 issues
  • NFC not working reliably
  • Accounts disappearing after updates
  • Calculation of codes not working
  • Keyboard issues when using keys

Requested features

5 requests
  • Allow editing and rearranging of entries
  • Add support for multiple keys per account
  • Improve iPad/tablet support
  • Add dark mode option
  • Improve QR code scanning

In-app purchases

6 purchases

Encrypted Email

Subscriptions4
  • Mail Plus 1 month$5.991 Month
  • Unlimited 1 month$14.991 Month
  • Mail Plus 12 months$47.901 Year
Show 1 more
  • Unlimited 1 year$119.001 Year
One-time2
  • Mail Plus (1 year)$59.99
  • Proton Unlimited$149.99
None

Yubico Authenticator

No in-app purchases

Questions

Is Encrypted Email free?
Encrypted Email is free to download, with in-app purchases available.
Is Yubico Authenticator free?
Yubico Authenticator is free to download, with no in-app purchases.
Which has better reviews, Encrypted Email or Yubico Authenticator?
Encrypted Email is rated higher. Encrypted Email averages 4.8 out of 5 from 49K ratings, while Yubico Authenticator averages 3.7 from 286 ratings.
Do Encrypted Email or Yubico Authenticator have ads?
Neither Encrypted Email nor Yubico Authenticator shows ads.
Which is updated more often, Encrypted Email or Yubico Authenticator?
Encrypted Email ships an update every 11 days, and Yubico Authenticator monthly. Most recently, Encrypted Email was updated on October 22, 2026 and Yubico Authenticator on October 22, 2026.

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