Thunderbird is a 100% open source, privacy focused email app.
About this app
Help make the next Thunderbird release as awesome as possible by downloading Thunderbird Beta and getting early access to the latest features and bug fixes before they're officially released. Your testing and feedback are important, so please report bugs, rough edges, and share your thoughts with us!
Find our bug tracker, source code, and wiki at https://github.com/thunderbird/thunderbird-android.
We’re always happy to welcome new developers, designers, documenters, translators, bug triagers and friends. Visit us at https://thunderbird.net/participate to get started.
Thunderbird is a powerful, privacy-focused email app. Effortlessly manage multiple email accounts from one app, with a Unified Inbox option for maximum productivity. Built on open-source technology and supported by a dedicated team of developers alongside a global community of volunteers, Thunderbird never treats your private data as a product. Supported solely by financial contributions from our users, so you never have to see ads mixed in with your emails again.
What you can do
• Ditch multiple apps and webmail. Use one app, with an optional Unified Inbox, to power through your day.
• Enjoy a privacy-friendly email client that never collects or sells your personal data. We directly connect you to your email provider. That’s it!
• Take your privacy to the next level by using OpenPGP email encryption (PGP/MIME) with the “OpenKeychain” app, to encrypt and decrypt your messages.
• Choose to sync your email instantly, at set intervals, or on-demand. However you want to check your email, it’s up to you!
• Find your important messages using both local and server-side search.
Compatibility
• Thunderbird works with IMAP and POP3 protocols, supporting a wide range of email providers, including Gmail, Outlook, Yahoo Mail, iCloud, and more.
Why use Thunderbird
• The trusted name in email for over 20 years - now on Android.
• Thunderbird is fully funded by voluntary contributions from our users. We don’t mine your personal data. You are never the product.
• Made by a team that is as efficiency-minded as you are. We want you to spend minimal time using the app while getting maximum in return.
• With contributors from all over the world, Thunderbird for Android has been translated into more than 20 languages.
• Supported by MZLA Technologies Corporation, a wholly owned subsidiary of the Mozilla Foundation.
Open Source and Community
• Thunderbird is free and open source, which means its code is available to see, modify, use and share freely. Its license also ensures that it will be free forever. You can think of Thunderbird as a gift from thousands of contributors to you.
• We develop in the open with regular, transparent updates on our blog and mailing lists.
• Our user support is powered by our global community. Find the answers you need, or step into the role of a contributor - whether it’s answering questions, translating the app, or telling your friends and family about Thunderbird.
Licensed under Apache-2.0.
What's New in v21.0b2
Imported from the F-Droid repository index.
- Thunderbird version 21.0b2
- Fixed:
- - Manage Folders opened the wrong account instead of the selected account
- - Application crashed when attempting to change account color
Version history
Jul 1, 2026 · 10.3 MB · Android API 23–35 · code 55
Imported from the F-Droid repository index.
- Thunderbird version 21.0b2
- Fixed:
- - Manage Folders opened the wrong account instead of the selected account
- - Application crashed when attempting to change account color
SHA-256 e1f4a59e3e32ba645fa924eb9b8b5033472bdc3c3f34d9feb20d216f8df31204
Jun 24, 2026 · 10.3 MB · Android API 23–35 · code 54
Imported from the F-Droid repository index.
- Thunderbird version 21.0b1
- Changed:
- - Animation setting now allows On, Off, and System Default options
- - Modernized 'Fetching mail' account settings screen
- Fixed:
- - Modernized 'Composition defaults' screen
SHA-256 ebe8db3d20cedf22b0ffcc4df776a29d269fdc37c7649d4641f25e46d7602587
Jun 5, 2026 · 10.2 MB · Android API 23–35 · code 53
Imported from the F-Droid repository index.
- Thunderbird version 20.0b2
- New:
- - Enable easily discoverable way to configure and use Thundermail
- Fixed:
- - K-9 Mail crashed when scanning Thundermail QR code
SHA-256 5c63adf2664dd76802d88db84f792b9847be571231ac1f184c3cdeb5be2db28c
Will it run on your device?
92%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be net.thunderbird.android.beta is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 21.0b1 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Thunderbird Beta for Testers first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Thunderbird Beta for Testers, and a listing is removed when the evidence for it stops holding up.
Get Thunderbird Beta for Testers
Every source we list for net.thunderbird.android.beta is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
e1f4a59e3e32ba645fa924eb9b8b5033472bdc3c3f34d9feb20d216f8df31204
Signing certificate
056bfafb450249502fd9226228704c2529e1b822da06760d47a85c9557741fbd
Permissions Required
What each permission lets Thunderbird Beta for Testers do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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