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Delta Chat
Chat over e-mail
Version History
Update Comparison
App Status
  • Earliest Version Launch Date Globally
    08/22/2020
  • Latest Version
    1.46.5
  • Time Since Latest Version
    10days21Hour
  • Total Updated Versions (last 1 year)
    12

Version Timeline

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Version History
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Version History

  • Version1.46.5
    06/24/2024
    Size:54.11M

    Chat over e-mail

    Update Log

    * contacts can be attached as "Cards" at "Attach / Contact"; when the receiver taps the cards, guaranteed end-to-end encrypted can be established
    * nicer display of "Contact Cards" (vcards), including the contact's avatar
    * lots of bug fixes
    These features will roll out over the coming days. Thanks for using Delta Chat!

    Screenshots
    App Description

    Delta Chat is a messenger that uses the largest, most diverse and decentralized communication system ever created: the existing e-mail server network. Just use your standard e-mail account and start chatting with any of your e-mail contacts, whether they have installed Delta Chat or not.
    Technically, Delta Chat is an e-mail application but with a modern chat interface. E-Mail in a new dress if you will. Chat and contact data remain on your devices. No uploads or centralized control of addressbook, calendar or other personal data. There simply are no Delta Chat servers where anything could be uploaded to.
    Use Delta Chat with anyone out of billions of people: just use their e-mail address. Recipients will see a simple e-mail and may directly reply with their own e-mail app. They don't need to install Delta Chat, visit websites or sign up anywhere. If you send a picture or other media to a chat group your chat recipients will see a nice regular e-mail with an attachment. If they send a message and attachments back, you will see the media in your chat for this contact.
    Delta Chat sends e-mails using your e-mail account and provider of choice. You can change mobile numbers without any trouble or even work without any SIM card or phone number at all. End-to-end encryption is established automatically when chat partners start communicating with each other.
    Delta Chat is a relatively young project, but already has a lot to offer. It employs a pragmatic and usability-driven approach to decentralized messaging. No re-inventing of wheels unless one of them causes actual trouble or concern. We rather often think about removing technology than adding yet more of it, trying to keep things maintainable and understandable for us and others. Most popular programming languages and many human languages are involved in the development of Delta Chat apps and the various activities around it.
    We are grateful for any help, be it contributing good bug reports, helping other users on the forum, participating in our open development with PRs and reviews, translations to more languages, working on new bots or setting up new experimental mail servers.

  • Version1.46.2
    06/04/2024
    Size:53.24M

    Chat over e-mail

    Update Log

    * fix: create new profile when scanning/tapping QR codes outside "Add Profile"
    * fix: timestamp in vcards is optional
    new features in the 1.46 release series:
    * new onboarding: you can create a new profile with one tap on "Create New Profile" - or use an existing login or second-device-setup as usual
    * make received VCards tappable
    * adding contacts manually at "New Chat / New Contact / Add Contact Manually"
    * faster reactions: access the reactions directly from the context menu, cleanup menu
    * show reactions in summaries
    * new map for - still experimental - location streaming (enable at "Settings / Advanced")
    * advanced settings resorted, you'll also find "password & account" and "show classic emails" there
    * one-to-one chats are read-only during reasonable run of securejoin
    * if securejoin is taking longer than expected, a warning is shown and messages can be sent
    * improve resilience by including more entries in DNS fallback cache
    * hide folder options if not supported by the used account
    * subsequent taps on the "Chats" icon scroll that chatlist to the top
    * show sum of unread chats on the chatlist's "Chats" icon
    * use "universal logging system", making the logs available in tools like "Console.app"
    * show recent log lines at "Advanced / View Log", if supported by the system
    These features will roll out over the coming days. Thanks for using Delta Chat!

    Screenshots
    App Description

    Delta Chat is a messenger that uses the largest, most diverse and decentralized communication system ever created: the existing e-mail server network. Just use your standard e-mail account and start chatting with any of your e-mail contacts, whether they have installed Delta Chat or not.
    Technically, Delta Chat is an e-mail application but with a modern chat interface. E-Mail in a new dress if you will. Chat and contact data remain on your devices. No uploads or centralized control of addressbook, calendar or other personal data. There simply are no Delta Chat servers where anything could be uploaded to.
    Use Delta Chat with anyone out of billions of people: just use their e-mail address. Recipients will see a simple e-mail and may directly reply with their own e-mail app. They don't need to install Delta Chat, visit websites or sign up anywhere. If you send a picture or other media to a chat group your chat recipients will see a nice regular e-mail with an attachment. If they send a message and attachments back, you will see the media in your chat for this contact.
    Delta Chat sends e-mails using your e-mail account and provider of choice. You can change mobile numbers without any trouble or even work without any SIM card or phone number at all. End-to-end encryption is established automatically when chat partners start communicating with each other.
    Delta Chat is a relatively young project, but already has a lot to offer. It employs a pragmatic and usability-driven approach to decentralized messaging. No re-inventing of wheels unless one of them causes actual trouble or concern. We rather often think about removing technology than adding yet more of it, trying to keep things maintainable and understandable for us and others. Most popular programming languages and many human languages are involved in the development of Delta Chat apps and the various activities around it.
    We are grateful for any help, be it contributing good bug reports, helping other users on the forum, participating in our open development with PRs and reviews, translations to more languages, working on new bots or setting up new experimental mail servers.

  • Version1.46.0
    06/01/2024
    Size:53.23M

    Chat over e-mail

    Update Log

    * new onboarding: you can create a new profile with one tap on "Create New Profile" - or use an existing login or second-device-setup as usual
    * make received VCards tappable
    * adding contacts manually at "New Chat / New Contact / Add Contact Manually"
    * faster reactions: access the reactions directly from the context menu, cleanup menu
    * show reactions in summaries
    * new map for - still experimental - location streaming (enable at "Settings / Advanced")
    * advanced settings resorted, you'll also find "password & account" and "show classic emails" there
    * one-to-one chats are read-only during reasonable run of securejoin
    * if securejoin is taking longer than expected, a warning is shown and messages can be sent
    * improve resilience by including more entries in DNS fallback cache
    * hide folder options if not supported by the used account
    * subsequent taps on the "Chats" icon scroll that chatlist to the top
    * show sum of unread chats on the chatlist's "Chats" icon
    * use "universal logging system", making the logs available in tools like "Console.app"
    * show recent log lines at "Advanced / View Log", if supported by the system
    These features will roll out over the coming days. Thanks for using Delta Chat!

    Screenshots
    App Description

    Delta Chat is a messenger that uses the largest, most diverse and decentralized communication system ever created: the existing e-mail server network. Just use your standard e-mail account and start chatting with any of your e-mail contacts, whether they have installed Delta Chat or not.
    Technically, Delta Chat is an e-mail application but with a modern chat interface. E-Mail in a new dress if you will. Chat and contact data remain on your devices. No uploads or centralized control of addressbook, calendar or other personal data. There simply are no Delta Chat servers where anything could be uploaded to.
    Use Delta Chat with anyone out of billions of people: just use their e-mail address. Recipients will see a simple e-mail and may directly reply with their own e-mail app. They don't need to install Delta Chat, visit websites or sign up anywhere. If you send a picture or other media to a chat group your chat recipients will see a nice regular e-mail with an attachment. If they send a message and attachments back, you will see the media in your chat for this contact.
    Delta Chat sends e-mails using your e-mail account and provider of choice. You can change mobile numbers without any trouble or even work without any SIM card or phone number at all. End-to-end encryption is established automatically when chat partners start communicating with each other.
    Delta Chat is a relatively young project, but already has a lot to offer. It employs a pragmatic and usability-driven approach to decentralized messaging. No re-inventing of wheels unless one of them causes actual trouble or concern. We rather often think about removing technology than adding yet more of it, trying to keep things maintainable and understandable for us and others. Most popular programming languages and many human languages are involved in the development of Delta Chat apps and the various activities around it.
    We are grateful for any help, be it contributing good bug reports, helping other users on the forum, participating in our open development with PRs and reviews, translations to more languages, working on new bots or setting up new experimental mail servers.

  • Version1.44.1
    03/28/2024
    Size:48.66M

    Chat over e-mail

    Update Log

    * show message content in notifications (previews are generated end-to-end-encrypted on the device and can be disabled in the system settings)
    * summaries use emojis for attachment type
    * "Message long-tap / Select More" added for read-only chats
    * paste QR codes from any QR code page
    * fix: open chats directly at the end, no more visible scrolling
    * fix input bar displayed during attach or info sometimes
    * fix: add white background to transparent avatars
    * fix crashes when exporting or importing huge accounts
    * fix: remove leading whitespace from subject
    * fix problem with sharing the same key by several accounts
    * fix remote group membership changes always overriding local ones

    Screenshots
    App Description

    Delta Chat is a messenger that uses the largest, most diverse and decentralized communication system ever created: the existing e-mail server network. Just use your standard e-mail account and start chatting with any of your e-mail contacts, whether they have installed Delta Chat or not.
    Technically, Delta Chat is an e-mail application but with a modern chat interface. E-Mail in a new dress if you will. Chat and contact data remain on your devices. No uploads or centralized control of addressbook, calendar or other personal data. There simply are no Delta Chat servers where anything could be uploaded to.
    Use Delta Chat with anyone out of billions of people: just use their e-mail address. Recipients will see a simple e-mail and may directly reply with their own e-mail app. They don't need to install Delta Chat, visit websites or sign up anywhere. If you send a picture or other media to a chat group your chat recipients will see a nice regular e-mail with an attachment. If they send a message and attachments back, you will see the media in your chat for this contact.
    Delta Chat sends e-mails using your e-mail account and provider of choice. You can change mobile numbers without any trouble or even work without any SIM card or phone number at all. End-to-end encryption is established automatically when chat partners start communicating with each other.
    Delta Chat is a relatively young project, but already has a lot to offer. It employs a pragmatic and usability-driven approach to decentralized messaging. No re-inventing of wheels unless one of them causes actual trouble or concern. We rather often think about removing technology than adding yet more of it, trying to keep things maintainable and understandable for us and others. Most popular programming languages and many human languages are involved in the development of Delta Chat apps and the various activities around it.
    We are grateful for any help, be it contributing good bug reports, helping other users on the forum, participating in our open development with PRs and reviews, translations to more languages, working on new bots or setting up new experimental mail servers.

  • Version1.44.0
    03/09/2024
    Size:45.57M

    Chat over e-mail

    Update Log

    - react with any Emoji to a message
    - enlarge the account switcher by swiping up
    - offer "Select more" in read-only chats as well
    - sync self-avatar and self-signature text across devices
    - bug fixes

    Screenshots
    App Description

    Delta Chat is a messenger that uses the largest, most diverse and decentralized communication system ever created: the existing e-mail server network. Just use your standard e-mail account and start chatting with any of your e-mail contacts, whether they have installed Delta Chat or not.
    Technically, Delta Chat is an e-mail application but with a modern chat interface. E-Mail in a new dress if you will. Chat and contact data remain on your devices. No uploads or centralized control of addressbook, calendar or other personal data. There simply are no Delta Chat servers where anything could be uploaded to.
    Use Delta Chat with anyone out of billions of people: just use their e-mail address. Recipients will see a simple e-mail and may directly reply with their own e-mail app. They don't need to install Delta Chat, visit websites or sign up anywhere. If you send a picture or other media to a chat group your chat recipients will see a nice regular e-mail with an attachment. If they send a message and attachments back, you will see the media in your chat for this contact.
    Delta Chat sends e-mails using your e-mail account and provider of choice. You can change mobile numbers without any trouble or even work without any SIM card or phone number at all. End-to-end encryption is established automatically when chat partners start communicating with each other.
    Delta Chat is a relatively young project, but already has a lot to offer. It employs a pragmatic and usability-driven approach to decentralized messaging. No re-inventing of wheels unless one of them causes actual trouble or concern. We rather often think about removing technology than adding yet more of it, trying to keep things maintainable and understandable for us and others. Most popular programming languages and many human languages are involved in the development of Delta Chat apps and the various activities around it.
    We are grateful for any help, be it contributing good bug reports, helping other users on the forum, participating in our open development with PRs and reviews, translations to more languages, working on new bots or setting up new experimental mail servers.

  • Versionv1.42.8
    12/19/2023
    Size:45.27M

    Chat over e-mail

    Update Log

    * fix checking for new messages in the background being aborted before finishing fetching the messages
    * fix: sync pin/archive across devices also for groups created by non-delta-chats clients
    * fix: show padlock in empty part if the whole message is empty
    * fix: more reliable message pushing from IMAP implementations as mailbox.org (renew IDLE timeout on keepalives and reduce it to 5 minutes)
    * update translations

    Screenshots
    App Description

    Delta Chat is a messenger that uses the largest, most diverse and decentralized communication system ever created: the existing e-mail server network. Just use your standard e-mail account and start chatting with any of your e-mail contacts, whether they have installed Delta Chat or not.
    Technically, Delta Chat is an e-mail application but with a modern chat interface. E-Mail in a new dress if you will. Chat and contact data remain on your devices. No uploads or centralized control of addressbook, calendar or other personal data. There simply are no Delta Chat servers where anything could be uploaded to.
    Use Delta Chat with anyone out of billions of people: just use their e-mail address. Recipients will see a simple e-mail and may directly reply with their own e-mail app. They don't need to install Delta Chat, visit websites or sign up anywhere. If you send a picture or other media to a chat group your chat recipients will see a nice regular e-mail with an attachment. If they send a message and attachments back, you will see the media in your chat for this contact.
    Delta Chat sends e-mails using your e-mail account and provider of choice. You can change mobile numbers without any trouble or even work without any SIM card or phone number at all. End-to-end encryption is established automatically when chat partners start communicating with each other.
    Delta Chat is a relatively young project, but already has a lot to offer. It employs a pragmatic and usability-driven approach to decentralized messaging. No re-inventing of wheels unless one of them causes actual trouble or concern. We rather often think about removing technology than adding yet more of it, trying to keep things maintainable and understandable for us and others. Most popular programming languages and many human languages are involved in the development of Delta Chat apps and the various activities around it.
    We are grateful for any help, be it contributing good bug reports, helping other users on the forum, participating in our open development with PRs and reviews, translations to more languages, working on new bots or setting up new experimental mail servers.

  • Version1.42.7
    12/11/2023
    Size:45.26M

    Chat over e-mail

    Update Log

    * fix: immediate feedback when tapping chat titles
    * fix crashes and notification issues due to races in shutdown event handler
    * fix crashes and notification issues due to account lock file
    * fix crashes and notification issues by fading out "encrypted database" experiment introduced in 1.28.0
    (database is still encrypted by the system, for existing "encrypted database" users a messages is shown)
    * fix: align "Disappearing Messages" options with the ones used on other systems
    * fix decryption errors when using multiple private keys
    * fix more log in errors for providers as 163.com; this was introduced in 1.42.3
    * sync changes on "Your Profile Name", "Show Class Mails", "Read Receipts" options across devices

    Screenshots
    App Description

    Delta Chat is a messenger that uses the largest, most diverse and decentralized communication system ever created: the existing e-mail server network. Just use your standard e-mail account and start chatting with any of your e-mail contacts, whether they have installed Delta Chat or not.
    Technically, Delta Chat is an e-mail application but with a modern chat interface. E-Mail in a new dress if you will. Chat and contact data remain on your devices. No uploads or centralized control of addressbook, calendar or other personal data. There simply are no Delta Chat servers where anything could be uploaded to.
    Use Delta Chat with anyone out of billions of people: just use their e-mail address. Recipients will see a simple e-mail and may directly reply with their own e-mail app. They don't need to install Delta Chat, visit websites or sign up anywhere. If you send a picture or other media to a chat group your chat recipients will see a nice regular e-mail with an attachment. If they send a message and attachments back, you will see the media in your chat for this contact.
    Delta Chat sends e-mails using your e-mail account and provider of choice. You can change mobile numbers without any trouble or even work without any SIM card or phone number at all. End-to-end encryption is established automatically when chat partners start communicating with each other.
    Delta Chat is a relatively young project, but already has a lot to offer. It employs a pragmatic and usability-driven approach to decentralized messaging. No re-inventing of wheels unless one of them causes actual trouble or concern. We rather often think about removing technology than adding yet more of it, trying to keep things maintainable and understandable for us and others. Most popular programming languages and many human languages are involved in the development of Delta Chat apps and the various activities around it.
    We are grateful for any help, be it contributing good bug reports, helping other users on the forum, participating in our open development with PRs and reviews, translations to more languages, working on new bots or setting up new experimental mail servers.

  • Version1.42.4
    11/25/2023
    Size:45.20M

    Chat over e-mail

    Update Log

    * fix possibly infinte IMAP loop on some providers; this was introduced in 1.42.3
    * fix log in error on some providers as 163.com; this was introduced in 1.42.3
    * fix: do not allow swipe-to-reply on daymarkers or other markers
    * fix instructions for how to play unsupported video formats

    Screenshots
    App Description

    Delta Chat is a messenger that uses the largest, most diverse and decentralized communication system ever created: the existing e-mail server network. Just use your standard e-mail account and start chatting with any of your e-mail contacts, whether they have installed Delta Chat or not.
    Technically, Delta Chat is an e-mail application but with a modern chat interface. E-Mail in a new dress if you will. Chat and contact data remain on your devices. No uploads or centralized control of addressbook, calendar or other personal data. There simply are no Delta Chat servers where anything could be uploaded to.
    Use Delta Chat with anyone out of billions of people: just use their e-mail address. Recipients will see a simple e-mail and may directly reply with their own e-mail app. They don't need to install Delta Chat, visit websites or sign up anywhere. If you send a picture or other media to a chat group your chat recipients will see a nice regular e-mail with an attachment. If they send a message and attachments back, you will see the media in your chat for this contact.
    Delta Chat sends e-mails using your e-mail account and provider of choice. You can change mobile numbers without any trouble or even work without any SIM card or phone number at all. End-to-end encryption is established automatically when chat partners start communicating with each other.
    Delta Chat is a relatively young project, but already has a lot to offer. It employs a pragmatic and usability-driven approach to decentralized messaging. No re-inventing of wheels unless one of them causes actual trouble or concern. We rather often think about removing technology than adding yet more of it, trying to keep things maintainable and understandable for us and others. Most popular programming languages and many human languages are involved in the development of Delta Chat apps and the various activities around it.
    We are grateful for any help, be it contributing good bug reports, helping other users on the forum, participating in our open development with PRs and reviews, translations to more languages, working on new bots or setting up new experimental mail servers.

  • Version1.42.3
    11/23/2023
    Size:45.01M

    Chat over e-mail

    Update Log

    - one-to-one chats guarantee end-to-end encryption for contacts with a green checkmark now
    - for everyone's simplicity, we also mark these chats with green checkmarks
    - groups are created automatically with guaranteed end-to-end encryption if possible
    - Accept/Blocked, Archived, Pinned, Mute is synced across all your devices

    Screenshots
    App Description

    Delta Chat is a messenger that uses the largest, most diverse and decentralized communication system ever created: the existing e-mail server network. Just use your standard e-mail account and start chatting with any of your e-mail contacts, whether they have installed Delta Chat or not.
    Technically, Delta Chat is an e-mail application but with a modern chat interface. E-Mail in a new dress if you will. Chat and contact data remain on your devices. No uploads or centralized control of addressbook, calendar or other personal data. There simply are no Delta Chat servers where anything could be uploaded to.
    Use Delta Chat with anyone out of billions of people: just use their e-mail address. Recipients will see a simple e-mail and may directly reply with their own e-mail app. They don't need to install Delta Chat, visit websites or sign up anywhere. If you send a picture or other media to a chat group your chat recipients will see a nice regular e-mail with an attachment. If they send a message and attachments back, you will see the media in your chat for this contact.
    Delta Chat sends e-mails using your e-mail account and provider of choice. You can change mobile numbers without any trouble or even work without any SIM card or phone number at all. End-to-end encryption is established automatically when chat partners start communicating with each other.
    Delta Chat is a relatively young project, but already has a lot to offer. It employs a pragmatic and usability-driven approach to decentralized messaging. No re-inventing of wheels unless one of them causes actual trouble or concern. We rather often think about removing technology than adding yet more of it, trying to keep things maintainable and understandable for us and others. Most popular programming languages and many human languages are involved in the development of Delta Chat apps and the various activities around it.
    We are grateful for any help, be it contributing good bug reports, helping other users on the forum, participating in our open development with PRs and reviews, translations to more languages, working on new bots or setting up new experimental mail servers.

  • Version1.40.3
    10/10/2023
    Size:42.83M

    Chat over e-mail

    Update Log

    * fix a crash when opening the connectivity view on newer iOS versions
    * update libwebp and other libs
    * remove meet.jit.si from default video chat instances as it requires login now
    * minimum system version is iOS 12 now

    Screenshots
    App Description

    Delta Chat is a messenger that uses the largest, most diverse and decentralized communication system ever created: the existing e-mail server network. Just use your standard e-mail account and start chatting with any of your e-mail contacts, whether they have installed Delta Chat or not.
    Technically, Delta Chat is an e-mail application but with a modern chat interface. E-Mail in a new dress if you will. Chat and contact data remain on your devices. No uploads or centralized control of addressbook, calendar or other personal data. There simply are no Delta Chat servers where anything could be uploaded to.
    Use Delta Chat with anyone out of billions of people: just use their e-mail address. Recipients will see a simple e-mail and may directly reply with their own e-mail app. They don't need to install Delta Chat, visit websites or sign up anywhere. If you send a picture or other media to a chat group your chat recipients will see a nice regular e-mail with an attachment. If they send a message and attachments back, you will see the media in your chat for this contact.
    Delta Chat sends e-mails using your e-mail account and provider of choice. You can change mobile numbers without any trouble or even work without any SIM card or phone number at all. End-to-end encryption is established automatically when chat partners start communicating with each other.
    Delta Chat is a relatively young project, but already has a lot to offer. It employs a pragmatic and usability-driven approach to decentralized messaging. No re-inventing of wheels unless one of them causes actual trouble or concern. We rather often think about removing technology than adding yet more of it, trying to keep things maintainable and understandable for us and others. Most popular programming languages and many human languages are involved in the development of Delta Chat apps and the various activities around it.
    We are grateful for any help, be it contributing good bug reports, helping other users on the forum, participating in our open development with PRs and reviews, translations to more languages, working on new bots or setting up new experimental mail servers.

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