Tuta Mail: Secure Email: iPhone vs Android
Tuta Mail: Secure Email by Tutao GmbH is on both the App Store and Google Play. Here are both versions together: downloads, users, revenue, ratings and chart positions, store by store with totals.
Rating
4.5 ★
19k ratings, both stores
Measured
Best rank now
#157
Android · 
Communication Free
Communication FreeMeasured
App Store
App details
App ID
922429609
Publisher
Tutao GmbH
On the store since
Nov 2014
11 years on the store
Minimum OS
iOS 16.0+
iPhone 8 and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
59
AF SQ AR HY BE BN BS BR BG CA HR CS …
Size
89 MB
Also listed in
Social Networking
Google Play
App details
App ID
de.tutao.tutanota
Publisher
Tutao GmbH
Content rating
Everyone
Tuta Mail: Secure Email downloads & installs
Both stores, worldwide. Bands are open; exact numbers are free with an account.
| Store | Downloads / day | Lifetime installs |
|---|---|---|
| iPhone | – | 100k+ |
| Google Play | – | 1M+ Measured |
| Total | – | 1M+ Confidence |
How this is calculated
iPhone: chart positions and rating growth per country, anchored on its own Android downloads; lifetime from ratings worldwide × installs per rating. Google Play: the daily change in its exact install count. The total adds every store.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend before Apple and Google take their fee.
| Store | Per day | Per month | Share |
|---|---|---|---|
| App Store | |||
| Google Play | |||
| Total | Confidence | 100% |
Business model: In-app purchase-led
How Tuta Mail: Secure Email makes money: subscriptions, one-off purchases and ads.
In-app purchases
One-off purchases
/mo
of revenue
Where it ranks now
Both stores, across every country we track.
Ratings
Both stores. Store data, measured.
| Store | Rating | Ratings |
|---|---|---|
| App Store | 4.3 ★ | 144 |
| Google Play | 4.5 ★ | 19k 1.4k written reviews |
| Both stores | 4.5 ★ weighted by ratings | 19k |
About Tuta Mail: Secure Email
PROTECT YOUR PRIVACY WITH TUTA MAIL – FREE, SECURE & ENCRYPTED EMAIL
Take control of your email with Tuta Mail, the world’s most secure email service, trusted by over 10 million users. With end-to-end encryption, your emails and contacts stay private. Fast, open source, and free: Tuta Mail is built with the highest security standards.
WHY CHOOSE TUTA MAIL?
Stay Secure
• Quantum-Safe Encryption: Your entire mailbox and contacts are fully end-to-end encrypted – only you can access them.
• Zero Tracking: We never track or profile you. Your data is yours.
• Anonymous Registration: Sign up without providing a phone number or personal details – for free or pay anonymously with cash or cryptocurrency.
• Open Source: Our code is publicly available for independent security review.
Boost Your Productivity
• Free Secure Email: Get a free email address with @tutamail.com, @tutanota.com, @tutanota.de, @tuta.io, or @keemail.me and 1 GB of free storage.
• Exclusive Domain: Upgrade to a paid plan to create a short @tuta.com email address.
• Auto-Sync: Your emails and contacts sync seamlessly across the app, web, and desktop clients.
• Offline Access: Read and manage your encrypted emails even without an internet connection.
• Contacts App: Sync your Tuta contacts to your phone.
Simple & Intuitive
• User-Friendly Interface: Clean, modern design with light and dark mode.
• Quick Swipe Gestures: Easily organize emails with swipe-to-archive or swipe-to-trash.
• Full-Text Search: Securely search your encrypted emails.
• Smart Notifications: Delete or move emails directly from notifications to save time.
BONUS: FREE ENCRYPTED CALENDAR APP
Your Tuta Mail account includes a free encrypted calendar, giving you the same privacy for scheduling and event management. Stay organized while keeping your data safe.
WHO IS BEHIND TUTA MAIL?
Freedom fighters committed to protecting freedom of speech and your right to privacy!
• Developed & Hosted in Germany: Adheres to strict GDPR data protection laws.
• Private by Design: We can’t access your data – secure password reset ensures your privacy.
• Secure Transmission: Industry-leading security with TLS, PFS, DMARC, DKIM, DNSSEC, and DANE for safe email delivery.
TRUSTED BY SECURITY EXPERTS
"Tuta provides an exceptional level of security and privacy... If security is your priority, there’s not much better than Tuta."
— TechRadar
"Since Tuta is open source and has amazing products in development, I moved my email there."
— Journalist Dan Arel
"Tuta’s email security is unmatched. Its mobile apps are fast and user-friendly, with fair pricing and a free option."
— CyberSynchs
JOIN MILLIONS WHO TRUST TUTA MAIL
Keep Your Email Private: Download Tuta Mail today and join millions who trust us for secure, encrypted communication.
Website: https://tuta.com
Open Source Code: https://github.com/tutao/tutanota
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Take control of your email with Tuta Mail, the world’s most secure email service, trusted by over 10 million users. With end-to-end encryption, your emails and contacts stay private. Fast, open source, and free: Tuta Mail is built with the highest security standards.
WHY CHOOSE TUTA MAIL?
Stay Secure
• Quantum-Safe Encryption: Your entire mailbox and contacts are fully end-to-end encrypted – only you can access them.
• Zero Tracking: We never track or profile you. Your data is yours.
• Anonymous Registration: Sign up without providing a phone number or personal details – for free or pay anonymously with cash or cryptocurrency.
• Open Source: Our code is publicly available for independent security review.
Boost Your Productivity
• Free Secure Email: Get a free email address with @tutamail.com, @tutanota.com, @tutanota.de, @tuta.io, or @keemail.me and 1 GB of free storage.
• Exclusive Domain: Upgrade to a paid plan to create a short @tuta.com email address.
• Auto-Sync: Your emails and contacts sync seamlessly across the app, web, and desktop clients.
• Offline Access: Read and manage your encrypted emails even without an internet connection.
• Contacts App: Sync your Tuta contacts to your phone.
Simple & Intuitive
• User-Friendly Interface: Clean, modern design with light and dark mode.
• Quick Swipe Gestures: Easily organize emails with swipe-to-archive or swipe-to-trash.
• Full-Text Search: Securely search your encrypted emails.
• Smart Notifications: Delete or move emails directly from notifications to save time.
BONUS: FREE ENCRYPTED CALENDAR APP
Your Tuta Mail account includes a free encrypted calendar, giving you the same privacy for scheduling and event management. Stay organized while keeping your data safe.
WHO IS BEHIND TUTA MAIL?
Freedom fighters committed to protecting freedom of speech and your right to privacy!
• Developed & Hosted in Germany: Adheres to strict GDPR data protection laws.
• Private by Design: We can’t access your data – secure password reset ensures your privacy.
• Secure Transmission: Industry-leading security with TLS, PFS, DMARC, DKIM, DNSSEC, and DANE for safe email delivery.
TRUSTED BY SECURITY EXPERTS
"Tuta provides an exceptional level of security and privacy... If security is your priority, there’s not much better than Tuta."
— TechRadar
"Since Tuta is open source and has amazing products in development, I moved my email there."
— Journalist Dan Arel
"Tuta’s email security is unmatched. Its mobile apps are fast and user-friendly, with fair pricing and a free option."
— CyberSynchs
JOIN MILLIONS WHO TRUST TUTA MAIL
Keep Your Email Private: Download Tuta Mail today and join millions who trust us for secure, encrypted communication.
Website: https://tuta.com
Open Source Code: https://github.com/tutao/tutanota
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Tuta Mail: Secure Email iPhone
Not in any tracked top chart right now.
Updated 25 Oct 2026 · rankings refresh through the day
DeveloperTutao GmbH
CategoryProductivity
PriceFree
Released
Rating★ 4.3 (144)
Version361.261006.0
Age rating4+
First seen by us
18 Oct 2026
18 Oct 2026Installs (est.)100k+ worldwide
Rating
4.3 ★
144 ratings
Measured
Tuta Mail: Secure Email on the App Store
App details
App ID
922429609
Publisher
Tutao GmbH
On the store since
Nov 2014
11 years on the store
Minimum OS
iOS 16.0+
iPhone 8 and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
59
AF SQ AR HY BE BN BS BR BG CA HR CS …
Size
89 MB
Also listed in
Social Networking
Tuta Mail: Secure Email downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. iPhone downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend in Tuta Mail: Secure Email before Apple and Google take their fee.
How this is calculated
Not on any Top Grossing chart: monthly active users × spend per user for its category, measured on the charted apps nearest the bottom of the charts.
Business model: In-app purchase-led
How Tuta Mail: Secure Email makes money: subscriptions, one-off purchases and ads.
In-app purchases
One-off purchases
/mo
of revenue
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
4.3 ★
144 ratings
Measured
Ratings
144
Measured
About Tuta Mail: Secure Email
PROTECT YOUR PRIVACY WITH TUTA MAIL – FREE, SECURE & ENCRYPTED EMAIL
Take control of your email with Tuta Mail, the world’s most secure email service, trusted by over 10 million users. With end-to-end encryption, your emails and contacts stay private. Fast, open source, and free: Tuta Mail is built with the highest security standards.
WHY CHOOSE TUTA MAIL?
Stay Secure
• Quantum-Safe Encryption: Your entire mailbox and contacts are fully end-to-end encrypted – only you can access them.
• Zero Tracking: We never track or profile you. Your data is yours.
• Anonymous Registration: Sign up without providing a phone number or personal details – for free or pay anonymously with cash or cryptocurrency.
• Open Source: Our code is publicly available for independent security review.
Boost Your Productivity
• Free Secure Email: Get a free email address with @tutamail.com, @tutanota.com, @tutanota.de, @tuta.io, or @keemail.me and 1 GB of free storage.
• Exclusive Domain: Upgrade to a paid plan to create a short @tuta.com email address.
• Auto-Sync: Your emails and contacts sync seamlessly across the app, web, and desktop clients.
• Offline Access: Read and manage your encrypted emails even without an internet connection.
• Contacts App: Sync your Tuta contacts to your phone.
Simple & Intuitive
• User-Friendly Interface: Clean, modern design with light and dark mode.
• Quick Swipe Gestures: Easily organize emails with swipe-to-archive or swipe-to-trash.
• Full-Text Search: Securely search your encrypted emails.
• Smart Notifications: Delete or move emails directly from notifications to save time.
BONUS: FREE ENCRYPTED CALENDAR APP
Your Tuta Mail account includes a free encrypted calendar, giving you the same privacy for scheduling and event management. Stay organized while keeping your data safe.
WHO IS BEHIND TUTA MAIL?
Freedom fighters committed to protecting freedom of speech and your right to privacy!
• Developed & Hosted in Germany: Adheres to strict GDPR data protection laws.
• Private by Design: We can’t access your data – secure password reset ensures your privacy.
• Secure Transmission: Industry-leading security with TLS, PFS, DMARC, DKIM, DNSSEC, and DANE for safe email delivery.
TRUSTED BY SECURITY EXPERTS
"Tuta provides an exceptional level of security and privacy... If security is your priority, there’s not much better than Tuta."
— TechRadar
"Since Tuta is open source and has amazing products in development, I moved my email there."
— Journalist Dan Arel
"Tuta’s email security is unmatched. Its mobile apps are fast and user-friendly, with fair pricing and a free option."
— CyberSynchs
JOIN MILLIONS WHO TRUST TUTA MAIL
Keep Your Email Private: Download Tuta Mail today and join millions who trust us for secure, encrypted communication.
Website: https://tuta.com
Open Source Code: https://github.com/tutao/tutanota
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Take control of your email with Tuta Mail, the world’s most secure email service, trusted by over 10 million users. With end-to-end encryption, your emails and contacts stay private. Fast, open source, and free: Tuta Mail is built with the highest security standards.
WHY CHOOSE TUTA MAIL?
Stay Secure
• Quantum-Safe Encryption: Your entire mailbox and contacts are fully end-to-end encrypted – only you can access them.
• Zero Tracking: We never track or profile you. Your data is yours.
• Anonymous Registration: Sign up without providing a phone number or personal details – for free or pay anonymously with cash or cryptocurrency.
• Open Source: Our code is publicly available for independent security review.
Boost Your Productivity
• Free Secure Email: Get a free email address with @tutamail.com, @tutanota.com, @tutanota.de, @tuta.io, or @keemail.me and 1 GB of free storage.
• Exclusive Domain: Upgrade to a paid plan to create a short @tuta.com email address.
• Auto-Sync: Your emails and contacts sync seamlessly across the app, web, and desktop clients.
• Offline Access: Read and manage your encrypted emails even without an internet connection.
• Contacts App: Sync your Tuta contacts to your phone.
Simple & Intuitive
• User-Friendly Interface: Clean, modern design with light and dark mode.
• Quick Swipe Gestures: Easily organize emails with swipe-to-archive or swipe-to-trash.
• Full-Text Search: Securely search your encrypted emails.
• Smart Notifications: Delete or move emails directly from notifications to save time.
BONUS: FREE ENCRYPTED CALENDAR APP
Your Tuta Mail account includes a free encrypted calendar, giving you the same privacy for scheduling and event management. Stay organized while keeping your data safe.
WHO IS BEHIND TUTA MAIL?
Freedom fighters committed to protecting freedom of speech and your right to privacy!
• Developed & Hosted in Germany: Adheres to strict GDPR data protection laws.
• Private by Design: We can’t access your data – secure password reset ensures your privacy.
• Secure Transmission: Industry-leading security with TLS, PFS, DMARC, DKIM, DNSSEC, and DANE for safe email delivery.
TRUSTED BY SECURITY EXPERTS
"Tuta provides an exceptional level of security and privacy... If security is your priority, there’s not much better than Tuta."
— TechRadar
"Since Tuta is open source and has amazing products in development, I moved my email there."
— Journalist Dan Arel
"Tuta’s email security is unmatched. Its mobile apps are fast and user-friendly, with fair pricing and a free option."
— CyberSynchs
JOIN MILLIONS WHO TRUST TUTA MAIL
Keep Your Email Private: Download Tuta Mail today and join millions who trust us for secure, encrypted communication.
Website: https://tuta.com
Open Source Code: https://github.com/tutao/tutanota
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Latest updates
361.261006.0
Improvements in Tuta
• Improved progress indicator when indexing mails
• Download all mail details archives (one at a time) first, then download and index mails
• Added a delay before expanding folders during drag-and-drop
Bugfixes
• Logged errors retrieved as ? when getting logs
• Mail Details are not being cached and are deleted after indexing
• Other small bugfixes
A detailed list of the technical changes can be found on our client GitHub repository: https://github.com/tutao/tutanota/releases/tag/tuta-drive-android-release-361.261006.0
More from Tutao GmbH
Tuta Mail: Secure Email Android
Tuta Mail: Secure Email is #174 in Communication Free on Google Play in United Kingdom and charting in 5 of 23 countries we track.
Updated 25 Oct 2026 · rankings refresh through the day
DeveloperTutao GmbH
CategoryCommunication
PriceFree
Released
Installs1M+
Rating★ 4.5 (19k)
Updated
Content ratingEveryone
Rating
4.5 ★
19k ratings
Measured
Best rank now
#174
Communication FreeMeasured
Tuta Mail: Secure Email on Google Play
App details
App ID
de.tutao.tutanota
Publisher
Tutao GmbH
Content rating
Everyone
Tuta Mail: Secure Email downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Google Play shows an exact lifetime install count; downloads per day are its daily change (measured). When Play hasn't refreshed the count, they come from new ratings and Top Free chart positions. Confidence is the chance the real number is within half to double ours.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend in Tuta Mail: Secure Email before Apple and Google take their fee.
How this is calculated
Not on any Top Grossing chart: monthly active users × spend per user for its category, measured on the charted apps nearest the bottom of the charts.
Business model: In-app purchase-led
How Tuta Mail: Secure Email makes money: subscriptions, one-off purchases and ads.
In-app purchases
One-off purchases
/mo
of revenue
Where it ranks on Google Play
Every top 200 chart it appears in across 23 countries.
| Country | Charts | Rank |
|---|---|---|
| United Kingdom | CommunicationFree | #174 |
| Germany | CommunicationFree | #157 |
 Australia | CommunicationFree | #184 |
 Italy | CommunicationFree | #186 |
 Netherlands | CommunicationFree | #186 |
Apps near Tuta Mail: Secure Email on the chart
Communication Free, around #174.
Ratings
Google Play, worldwide.
Rating
4.5 ★
19k ratings
Measured
Ratings
19k
Measured
Written reviews
1.4k
Measured
About Tuta Mail: Secure Email
PROTECT YOUR PRIVACY WITH TUTA MAIL - FREE, SECURE & ENCRYPTED EMAIL
Take control of your email with Tuta Mail, the world’s most secure email service, trusted by over 10 million users worldwide. With end-to-end encryption, your emails and contacts stay private. Fast, open source, and free: Tuta Mail is built with the highest security standards.
WHY CHOOSE TUTA MAIL?
Stay Secure
• Quantum-Safe Encryption: Your entire mailbox and contacts are fully end-to-end encrypted - only you can access them.
• Zero Tracking: We never track or profile you. Your data is yours.
• Anonymous Registration: Sign up without providing a phone number or personal details - for free or pay anonymously with cash or cryptocurrency.
• Open Source: Our code is publicly available for independent security review.
Boost Your Productivity
• Free Secure Email: Get a free email address with @tutamail.com, @tutanota.com, @tutanota.de, @tuta.io, or @keemail.me and 1 GB of free storage.
• Exclusive Domain: Upgrade to a paid plan to create a short @tuta.com email address or use your own domain.
• Auto-Sync: Your emails and contacts sync seamlessly across the app, web, and desktop clients.
• Offline Access: Read and manage your encrypted emails even without an internet connection.
• Contacts App: Sync your Tuta contacts to your phone.
• Simple & Intuitive
User-Friendly Interface:
• Clean, modern design with light and dark mode.
• Quick Swipe Gestures: Easily organize emails with swipe-to-archive or swipe-to-trash.
• Full-Text Search: Securely search your encrypted emails.
• Smart Notifications: Delete or move emails directly from notifications to save time.
BONUS: FREE ENCRYPTED CALENDAR APP
Your Tuta Mail account includes a free encrypted calendar, giving you the same privacy for scheduling and event management. Stay organized while keeping your data safe.
WHO IS BEHIND TUTA MAIL
Freedom fighters committed to protecting freedom of speech and your right to privacy!
• Developed & Hosted in Germany: Adheres to strict GDPR data protection laws.
• Private by Design: We can’t access your data - secure password reset ensures your privacy.
• Secure Transmission: Industry-leading security with TLS, PFS, DMARC, DKIM, DNSSEC, and DANE for safe email delivery.
TRUSTED BY SECURITY EXPERTS
"Tuta provides an exceptional level of security and privacy… If security is your priority, there’s not much better than Tuta."
- TechRadar
"Since Tuta is open source and has amazing products in development, I moved my email there."
- Journalist Dan Arel
"Tuta’s email security is unmatched. Its mobile apps are fast and user-friendly, with fair pricing and a free option."
- CyberSynchs
JOIN MILLIONS WHO TRUST TUTA MAIL
Keep Your Email Private: Download Tuta Mail today and join millions who trust us for secure, encrypted communication.
Website: https://tuta.com
Open Source Code: https://github.com/tutao/tutanota
PRICING
Tuta offers a free plan for everyone, plus premium plans with extra feat
Take control of your email with Tuta Mail, the world’s most secure email service, trusted by over 10 million users worldwide. With end-to-end encryption, your emails and contacts stay private. Fast, open source, and free: Tuta Mail is built with the highest security standards.
WHY CHOOSE TUTA MAIL?
Stay Secure
• Quantum-Safe Encryption: Your entire mailbox and contacts are fully end-to-end encrypted - only you can access them.
• Zero Tracking: We never track or profile you. Your data is yours.
• Anonymous Registration: Sign up without providing a phone number or personal details - for free or pay anonymously with cash or cryptocurrency.
• Open Source: Our code is publicly available for independent security review.
Boost Your Productivity
• Free Secure Email: Get a free email address with @tutamail.com, @tutanota.com, @tutanota.de, @tuta.io, or @keemail.me and 1 GB of free storage.
• Exclusive Domain: Upgrade to a paid plan to create a short @tuta.com email address or use your own domain.
• Auto-Sync: Your emails and contacts sync seamlessly across the app, web, and desktop clients.
• Offline Access: Read and manage your encrypted emails even without an internet connection.
• Contacts App: Sync your Tuta contacts to your phone.
• Simple & Intuitive
User-Friendly Interface:
• Clean, modern design with light and dark mode.
• Quick Swipe Gestures: Easily organize emails with swipe-to-archive or swipe-to-trash.
• Full-Text Search: Securely search your encrypted emails.
• Smart Notifications: Delete or move emails directly from notifications to save time.
BONUS: FREE ENCRYPTED CALENDAR APP
Your Tuta Mail account includes a free encrypted calendar, giving you the same privacy for scheduling and event management. Stay organized while keeping your data safe.
WHO IS BEHIND TUTA MAIL
Freedom fighters committed to protecting freedom of speech and your right to privacy!
• Developed & Hosted in Germany: Adheres to strict GDPR data protection laws.
• Private by Design: We can’t access your data - secure password reset ensures your privacy.
• Secure Transmission: Industry-leading security with TLS, PFS, DMARC, DKIM, DNSSEC, and DANE for safe email delivery.
TRUSTED BY SECURITY EXPERTS
"Tuta provides an exceptional level of security and privacy… If security is your priority, there’s not much better than Tuta."
- TechRadar
"Since Tuta is open source and has amazing products in development, I moved my email there."
- Journalist Dan Arel
"Tuta’s email security is unmatched. Its mobile apps are fast and user-friendly, with fair pricing and a free option."
- CyberSynchs
JOIN MILLIONS WHO TRUST TUTA MAIL
Keep Your Email Private: Download Tuta Mail today and join millions who trust us for secure, encrypted communication.
Website: https://tuta.com
Open Source Code: https://github.com/tutao/tutanota
PRICING
Tuta offers a free plan for everyone, plus premium plans with extra feat
What's new in 360.260921.0
Default language – en-US
New features in Tuta:
-You can now add aliases to shared mailboxes
Bugfixes & Improvements
- Introduction of collapse mail body button
- Fix print mail action only prints the first page
- Labels
- Check folder and label names for duplicates everywhere
- Fixed unread mails count for labels
- Sort nested labels as expected
A detailed list of the technical changes can be found on our client GitHub repository: https://github.com/tutao/tutanota/releases
New features in Tuta:
-You can now add aliases to shared mailboxes
Bugfixes & Improvements
- Introduction of collapse mail body button
- Fix print mail action only prints the first page
- Labels
- Check folder and label names for duplicates everywhere
- Fixed unread mails count for labels
- Sort nested labels as expected
A detailed list of the technical changes can be found on our client GitHub repository: https://github.com/tutao/tutanota/releases