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Download Proton Mail: Encrypted Email 4.2.1 APK
Target: Android 14 (API 34)
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What's new in Proton Mail: Encrypted Email 4.2.1
- Improvements to the onboarding flow
- Fixed an issue where the soft keyboard would overlap the bottom sheet components
- Other minor fixes and improvements
About Proton Mail: Encrypted Email 4.2.1
Keep your conversations private. Proton Mail is encrypted email from Switzerland. Used by millions worldwide, our all-new email app protects your communications and has everything you need to easily manage your inbox.
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The Wall Street Journal says:
“Proton Mail offers encrypted email, which makes it virtually impossible for anyone to read it except the sender and the recipient.”
With the all-new Proton Mail app, you can:
• Create a @proton.me or @protonmail.com email address
• Send and receive encrypted emails and attachments with ease
• Switch between multiple Proton Mail accounts
• Keep your inbox tidy and clean with folders, labels and simple swipe-gestures
• Receive new email notifications
• Send Password-protected Emails to anyone
• Enjoy your inbox in dark mode
Why use Proton Mail?
• Proton Mail is free — We believe everyone deserves privacy. Upgrade to a paid plan to get more done and support our mission.
• Easy to use — Our all-new app has been redesigned to make it easier to read, organize, and write your emails.
• Your inbox is yours — We don’t spy on your communications to show you targeted ads. Your inbox, your rules.
• Rigorous encryption — Your inbox is secured on all your devices. No one can read your emails but you. Proton is privacy, guaranteed by end-to-end and zero-access encryption.
• Unmatched protection — We offer strong phishing, spam, and spying/tracking protection.
Industry Leading Security Features
Messages are stored on Proton Mail servers using end-to-end encryption at all times and are transmitted securely between Proton servers and user devices. This largely eliminates the risk of message interception.
Zero Access to Your Email Content
Proton Mail's zero access architecture means that your data is encrypted in a way that makes it inaccessible to us. Data is encrypted on the client side using an encryption key that Proton does not have access to. This means we don't have the technical ability to decrypt your messages.
Open-Source Cryptography
Proton Mail's open-source software has been thoroughly vetted by security experts from around the world to ensure the highest levels of protection. Proton Mail only uses secure implementations of AES, RSA, along with OpenPGP, while all of the cryptographic libraries used are open source. By using open-source libraries, Proton Mail can guarantee that the encryption algorithms used do not have clandestinely built-in back doors.
Proton Mail in the press:
“Proton Mail is an email system which uses end-to-end encryption, making it impossible for outside parties to monitor.” Forbes
“A new email service being developed by a group from MIT that met at CERN promises to bring secure, encrypted email to the masses and keep sensitive information away from prying eyes.” Huffington Post
Follow Proton on social media for all the latest news and offers:
Facebook: /proton
Twitter: @protonprivacy
Reddit: /protonmail
Instagram: /protonprivacy
For more information, visit: proton.me/mail
Our open-source code base: github.com/ProtonMail
Proton Mail: Encrypted Email 4.2.1 variants
This release may come in several variants. Consult our handy FAQ to see which download is right for you.
Version:4.15.0(11782) for Android 9.0+ (Pie, API 28)
Uploaded:August 4, 2025 at 4:20PM UTC
File size:89.85 MB
Downloads:3,590
Version:4.14.1(11750) for Android 9.0+ (Pie, API 28)
Uploaded:July 23, 2025 at 3:17PM UTC
File size:89.84 MB
Downloads:406
Version:4.14.0(11737) for Android 9.0+ (Pie, API 28)
Uploaded:July 21, 2025 at 5:35AM UTC
File size:89.84 MB
Downloads:138
Version:4.13.0(11667) for Android 9.0+ (Pie, API 28)
Uploaded:July 1, 2025 at 1:48PM UTC
File size:89.65 MB
Downloads:625
Version:4.12.1(11641) for Android 9.0+ (Pie, API 28)
Uploaded:June 21, 2025 at 8:29AM UTC
File size:89.53 MB
Downloads:333
Version:4.11.0(11554) for Android 9.0+ (Pie, API 28)
Uploaded:May 26, 2025 at 10:23PM UTC
File size:84.44 MB
Downloads:735
Version:4.10.1(11501) for Android 9.0+ (Pie, API 28)
Uploaded:May 20, 2025 at 7:37AM UTC
File size:84.4 MB
Downloads:202
Version:4.10.0(11444) for Android 9.0+ (Pie, API 28)
Uploaded:May 5, 2025 at 9:48PM UTC
File size:84.39 MB
Downloads:397
Version:4.9.1(11362) for Android 9.0+ (Pie, API 28)
Uploaded:April 13, 2025 at 8:26PM UTC
File size:83.57 MB
Downloads:401
Version:4.9.0(11321) for Android 9.0+ (Pie, API 28)
Uploaded:March 31, 2025 at 2:50PM UTC
File size:83.56 MB
Downloads:219
Version:7.5.1
Uploaded:December 15, 2025 at 7:04PM UTC
File size:123.51 MB
Downloads:134
Version:7.4.2
Uploaded:December 15, 2025 at 12:21PM UTC
File size:123.34 MB
Downloads:15
Version:7.5.0
Uploaded:December 11, 2025 at 6:50AM UTC
File size:123.49 MB
Downloads:152
Version:7.4.1
Uploaded:December 3, 2025 at 6:03PM UTC
File size:123.31 MB
Downloads:202
Version:7.3.0
Uploaded:November 20, 2025 at 9:23PM UTC
File size:121.19 MB
Downloads:262
Version:7.2.3
Uploaded:November 12, 2025 at 7:50PM UTC
File size:120.79 MB
Downloads:230
Version:7.2.1
Uploaded:November 3, 2025 at 6:19PM UTC
File size:119.83 MB
Downloads:190
Version:7.2.0
Uploaded:October 31, 2025 at 4:59PM UTC
File size:119.83 MB
Downloads:180
Version:7.0.14
Uploaded:October 16, 2025 at 8:08AM UTC
File size:118.69 MB
Downloads:334
Version:7.0.13
Uploaded:October 9, 2025 at 11:56AM UTC
File size:118.69 MB
Downloads:230
