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Delta Chat

Decentral Private Messenger
116 Ratings
4.5
★★★★★
Age Rating
4+
Years
Developer
Language
EN
+44 More
Size
64.5
MB

Information

Apple ID1459523234
Bundle IDchat.delta
SellerSeller
Min iOS14.0
Min macOS11.0
Device familiesiphone, ipad, ipod
Released2020-01-08
Copyright© Delta Chat contributors
WebsiteLink ↗
Privacy policyLink ↗

Preview 2 platforms

iPhone 5 images

iPhone screenshot
iPhone screenshot
iPhone screenshot
iPhone screenshot
iPhone screenshot

iPad 3 images

iPad screenshot
iPad screenshot
iPad screenshot

What’s New Version 2.53.0

- "Calls" and "Channels" are available by default and are no longer experimental - Add outgoing ringing sound and call status - Resend the last 10 messages to new broadcast channel member - Consistent outgoing image quality between images with different aspect ratio - Enable PQC (Post-Quantum Cryptography) support. We do not generate PQC keys yet, this step is needed for forward compatibility - Add "Mark All as Read" to the profile switcher context menu - Improve avatar quality - Simplified classic provider handling - Add an option to process unencrypted messages to "Advanced / Relays / Edit / More Options". By default, only encrypted messages can be sent or received - Show full message screen now uses the system font - Click on location streaming info message to open the map - Ignore blocked contacts attempting scanning your QR code - Fix: Update the channel title after joining if the QR code included a wrong title - Fix: Don't send removal message to contact that hasn't been a chat member - Fix: Reactions could go to the wrong message if a new message was received while long pressing - Fix: update relay list when modified on other devices - Fix: Tapping "Me" in reactions overview would open the wrong contact on anything other than your first profile - Fix: Video and PDF thumbnails are now cached for smoother scrolling - Fix: Do not abort IMAP connection if setting the push token fails These features will roll out over the coming days. Thanks for using Delta Chat!

Description

Delta Chat is a reliable decentralized instant messenger that is easy and fun to use for friends, family, groups and organizations. Delta Chat is developed by a dedicated FOSS contributor community that jointly releases refinements and new features several times a year, across many stores and platforms world-wide. Features at a glance: • Private. Instant on-boarding without a phone number or other private data. • Friends & Family: Only chat with people you know. Unknown users cannot message or follow you without mutual consent. • Flexible. Supports multiple chat profiles and is easy to setup on multiple devices. • Reliable. Works under bad and adversarial network conditions. • Secure. Audited End-to-End encryption safe against network and server attacks. • Sovereign. Can be run with your own e-mail address or server. • FOSS. Fully Open Source/Free Software, built on Internet Standards.

Accessibility

ipadiphonemacrealityDevicetvoswatch

Version history 25 versions

Build 887087737v2.53.02026-06-17 17:45:53
- "Calls" and "Channels" are available by default and are no longer experimental - Add outgoing ringing sound and call status - Resend the last 10 messages to new broadcast channel member - Consistent outgoing image quality between images with different aspect ratio - Enable PQC (Post-Quantum Cryptography) support. We do not generate PQC keys yet, this step is needed for forward compatibility - Add "Mark All as Read" to the profile switcher context menu - Improve avatar quality - Simplified classic provider handling - Add an option to process unencrypted messages to "Advanced / Relays / Edit / More Options". By default, only encrypted messages can be sent or received - Show full message screen now uses the system font - Click on location streaming info message to open the map - Ignore blocked contacts attempting scanning your QR code - Fix: Update the channel title after joining if the QR code included a wrong title - Fix: Don't send removal message to contact that hasn't been a chat member - Fix: Reactions could go to the wrong message if a new message was received while long pressing - Fix: update relay list when modified on other devices - Fix: Tapping "Me" in reactions overview would open the wrong contact on anything other than your first profile - Fix: Video and PDF thumbnails are now cached for smoother scrolling - Fix: Do not abort IMAP connection if setting the push token fails These features will roll out over the coming days. Thanks for using Delta Chat!
Build 886825003v2.52.02026-06-11 19:39:53
- "Calls" and "Channels" are available by default and are no longer experimental - Resend the last 10 messages to new broadcast channel member - Enable PQC (Post-Quantum Cryptography) support. We do not generate PQC keys yet, this step is needed for forward compatibility - Add "Mark All as Read" to the profile switcher context menu - Improve avatar quality - Simplified classic provider handling - Add an option to process unencrypted messages to "Advanced / Relays / Edit / More Options". By default, only encrypted messages can be sent or received - Show full message screen now uses the system font - Click on location streaming info message to open the map - Fix: Update the channel title after joining if the QR code included a wrong title - Fix: Don't send removal message to contact that hasn't been a chat member - Fix: Reactions could go to the wrong message if a new message was received while long pressing - Fix: update relay list when modified on other devices These features will roll out over the coming days. Thanks for using Delta Chat!
Build 885077985v2.51.12026-06-08 10:13:09
- "Calls" and "Channels" are available by default and are no longer experimental - Resend the last 10 messages to new broadcast channel member - Enable PQC (Post-Quantum Cryptography) support. We do not generate PQC keys yet, this step is needed for forward compatibility - Add "Mark All as Read" to the profile switcher context menu - Improve avatar quality - Simplified classic provider handling - Add an option to process unencrypted messages to "Advanced / Relays / Edit / More Options". By default, only encrypted messages can be sent or received - Show full message screen now uses the system font - Several bug fixes These features will roll out over the coming days. Thanks for using Delta Chat!
Build 884843465v2.49.22026-04-29 13:29:38
Added an App Clip to handle an invite link in case the app wasn't installed yet.
Build 884594319v2.49.12026-04-23 09:49:46
This version is a pure bugfix release: - When tapping an invite link, after app installation, offer corresponding chat - Fix: do not crash when swiping keyboard down - Fix: Mark a message as delivered only after it has been fully sent out - Fix: Do not create 1:1 chat on second device when scanning a QR code - Fix: Do not URL-encode proxy hostnames - Fix: Let search also return hidden contacts if search value is an email address - Fix: Make informational messages stick to the top of the chat - Fix sometimes wrong detection of self-messages - Fix sometimes wrong orientaton of images - Fix: in-chat unread counter on the back button was not always updated after marking chats as unread - Fix memory leak when opening chatlist and chat frequently - Fix: Ignore messages about group name change from non-member These features will roll out over the coming days. Thanks for using Delta Chat!
Build 883796769v2.48.02026-04-02 12:23:17
- Increase resilience of multi-relay usage: if on relay goes down, messages are still received in the others - In the chat list, swipe a read chat to the right to mark it "unread" - Allow to switch profile when sharing or forwarding - Add group descriptions - Leave groups and channels before deletion - Support GIF stickers - Increase reply swipe sensitivity - Add tab bar icon bounce animation on tap - Tons of bug fixes
Build 882439649v2.43.02026-02-26 18:13:49
- Faster preview and notifications of large messages - Improve "Connectivity View" - Truncate file names in the middle, not at the end; important information are more often at the end - Experimental calls are now native - Fix: Notifications are now removed when you open their respective chat on a different device - Fix: No longer receive empty or ":" notifications when using experimental location sharing - Fix: Improve QR codes handshake on special server configurations - Fix: Fixed case where daymarkers could show the wrong date - Fix: Online indicator in the chat navigation bar now updates correctly when returning from background - Fix: Reset a previously removed setting that prevented adding new relays - Fix: Do not upscale small images - Fix: Restart I/O when there are new transports in a sync message - Fix: Disable partial search by contact address, which results in apparently random results as address is not shown - Fix: More reliable parsing of relay QR-codes and -links - Fix: Prevent possible infinite loop with invalid SMTP row - Fix: Sync broadcast subscribers list These features will roll out over the coming days. Thanks for using Delta Chat!
Build 881378866v2.35.02026-01-19 15:43:27
- Scanning a QR code with a relay ask for adding it as additional transport - Ask for device owner verification on profile deletion - Better logging - Simplify automatic deletion options - Fix: Show input-bar after QR scan immediately - Fix: Remove sometimes misleading "Please wait..." after QR code scan - Fix: Do not set normalized name for existing chats and contacts; it takes too long sometimes - Fix: Show relays in connectivity view by their hostname - Fix: Synchronize default relay immediately after changing it - Fix: Let securejoin succeed even if the chat was deleted in the meantime - Fix: Ask before sharing via a direct-share link - Fix: Show "Mark Read" icon on iOS 14/15 - Fix: Open chat after creating contact manually - Fix: Add manually added contacts to member list - Fix: Adding contacts manually is not possible for groups
Build 880494393v2.33.02025-12-11 11:12:56
- Handle additional relays - Improved metadata protection - Better multi-device: synchronize group creation across devices - Improve onboarding speed - Links in messages are now highlighted - Improve navigation in offline help - Lots of bug fixes These features will roll out over the coming days. Thanks for using Delta Chat!
Build 879220412v2.22.12025-10-30 18:23:37
- Disappearing messages options range from 5 minutes to 1 year now - Share email address for email contacts instead of vCard - In case of errors, tapping message text or status opens "message info" directly - Flatten profile menu - Show possible notification issues prominently in settings - Show addresses for address contacts only - Option to copy contact profile's "Encryption Info" to the clipboard - User colors get a more consistent appearance - Create user colors based on cryptographic identity instead of address - Withdraw all QR codes when one QR code is withdrawn - Support TLS 1.3 session resumption - Fix avatar color in vcards - Fix removing Exif data from corrupted images - Fix: Make calendar files available as an attachment - Fix transparency of larger stickers - Fix: do not show letter icon for partially downloaded messages - Fix: notifications now show up while the app is inactive in foreground (eg when in the app switcher) - Fix group creation and verification issues These features will roll out over the coming days. Thanks for using Delta Chat!
Build 877251807v2.11.02025-08-14 19:40:21
- Allow to clone email chats - Fix: Prevent the drag preview from showing upside down when long pressing reaction on an image - Fix some small bugs - Add Estonian translation These features will roll out over the coming days. Thanks for using Delta Chat!
Build 877027189v2.10.02025-08-07 01:56:07
- In Delta Chat, version 2.x, everything is encrypted by default - no locks or other symbols required. - Version 2.x also comes with improved profiles Recent changes in 2.10.0: - Do not enlarge default icons as 'Saved Messages' or 'Device Chat' - Show 'Saved Messages' icon in title - When tapping an address, open existing encrypted chat, if any These features will roll out over the coming days. Thanks for using Delta Chat!
Build 876898575v2.9.02025-08-01 22:05:07
- Separate between unencrypted and encrypted chats, avoiding mixing of encrypted/unencrypted messages in the same chat - Removed padlocks, as encrypted is the default "normal" state. Instead, unencrypted email is marked with a small letter icon - Green checkmarks removed where they mostly refer to encryption, which is the default now. They are still used for profile's "Introduced by" - Classic email chats get a big letter icon making it easy to recognize - Option to create a new email with subject and recipients - Images with huge pixel sizes are sent as "Files" - Indicate which message was scrolled to - Easier recognizable date headlines - Improve sorting "Saved Messages" - Improve logging and error handling - Lots of bug fixes
Build 876799420v2.8.02025-07-31 11:18:30
- Separate between unencrypted and encrypted chats, avoiding mixing of encrypted/unencrypted messages in the same chat - Removed padlocks, as encrypted is the default "normal" state. Instead, unencrypted email is marked with a small letter icon - Green checkmarks removed where they mostly refer to encryption, which is the default now. They are still used for profile's "Introduced by" - Classic email chats get a big letter icon making it easy to recognize - Option to create a new email with subject and recipients - Images with huge pixel sizes are sent as "Files" - Indicate which message was scrolled to - Easier recognizable date headlines - Improve sorting "Saved Messages" - Improve logging and error handling - Lots of bug fixes
Build 875911852v1.58.62025-06-26 17:40:22
- Access "Media" by an dedicated icon in chat's upper right corner - "All Media" are available from the settings - Speed up opening profiles - Show "Disappearing Messages" state alrady in menu - Fix sending voice messages if "Settings / Chats / Media Quality" is set to "Worse Quality" - Fix: align avatar in groups to message - Fix: return correct results when searching for a space - Fix: show video recoding and similar errors in an alert - Fix: video compression on iOS 16 - Fix: attaching GIFs and webP from gallery - Fix: drag and drop videos on iOS 15 - Fix: attaching files on iOS 15 These features will roll out over the coming days. Thanks for using Delta Chat!
Build 874939777v1.58.52025-05-21 19:11:50
- Fix notification sound - Fix bitrate for "worse" outgoing media quality - Save multiple selected messages in one go - Improve voice message UI These features will roll out over the coming days. Thanks for using Delta Chat!
Build 874832315v1.58.42025-05-17 21:14:20
- Nicer profile, focusing on recognising contacts - Fix adding chats from different profiles to widget - Fix: Show errors if changing address fails - Fix long tapping chats on iPad These features will roll out over the coming days. Thanks for using Delta Chat!
Build 874669613v1.58.32025-05-11 08:30:30
- Select and send multiple images at the same time - Recode videos to reasonable quality and size - Attach images and videos as original files - Support pasted GIFs - Notifications in Notification Center are grouped by chat - More characters in notification before truncating - Bug fixes These features will roll out over the coming days. Thanks for using Delta Chat!
Build 874013772v1.58.12025-04-14 20:38:38
- Modernise "Close" button in overlay sheets - Full-screen display of own avatar from "your profile" settings - Tapping info messages with contacts open the contact's profile - Hide superfluous "Show Classic E-mails" advanced setting for chatmail - Add a message with further information when securejoin times out (instead of allowing to send unencrypted) - Forwarding messages do not inherit "Edited" state - Data saving: do not send messages to the server if user is the only member of the chat in single-device usage - Synchronize contact name changes across devices - Hide address in primary settings screen, so it cannot be passed around without e2ee info - Show self bio summary in primary settings screen - Further metadata protection: encrypt message's sent date - Bug Fixes These features will roll out over the coming days. Thanks for using Delta Chat!
Build 873276419v1.54.52025-03-16 20:50:59
- Edit your messages - Delete your messages for everyone - Search "Saved Messages" from title bar (it was available in profile before) - Remove "Manage Keys" and "Import Autocrypt Setup Message"; use "Add Second Device" - Allow better avatar (profile picture) quality - Remove notifications from chat that was deleted from other device - When a chat is deleted, also delete its messages from server - Add mute option "8 hours" - Improve deletion confirmation for "Device Messages" - Fix decompression get stuck, leading to random errors sometimes - Fix rare crash when switching server and server reports bad quota - Fix names of explicitly attached files - Fix hiding of "disappearing messages" icon in edit mode - Fix rare crash when viewing avatars - Fixed more minor bugs These features will roll out over the coming days. Thanks for using Delta Chat!
Build 872943528v1.54.32025-03-04 07:58:19
• Accessibility: voice over reads a reaction summary for messages • Sync message and chat deletion to other devices • Allow scanning multiple QR-invitation codes without needing to wait for completion to scan the next one • Do not allow non-members to change ephemeral timer settings of groups • Properly display padlock when the message is not sent over the network • When reactions are seen in one device, remove notification from your other devices • Don't disturb with notification when someone leave a group • Share files generated by webxdc apps directly • Tweak menu order • Save space by Deduplicating files on sending • Detect incompatible profiles from newer app version when importing them • Show sender in "Saved Messages" • Bug fixes These features will roll out over the coming days. Thanks for using Delta Chat!
Build 872444256v1.54.02025-02-12 21:56:35
- Improve "message menu": many options are now faster accessible - Unify buttons and icons - When forwarding to "Saved Messages", if possible, save the message including context - Option to copy scanned QR code text to clipboard - Fix "Add Second Device" issues when scanning older QR codes - Fix vcards reading issues - Fix: Allow to share contacts that do not have a chat These features will roll out over the coming days. Thanks for using Delta Chat!
Build 872173851v1.52.22025-02-02 16:15:46
- Add option to "Save" a message to the messages' context menu - Saved messages are marked by a little star - In the "Saved Messages" chat, messages are shown in context and have an option to go to the original - The app now requires less storage by deduplicating newly received/sent files - Show 'unconnected' and 'updating' states in profile switcher - Add 'Paste from Clipboard' to onboarding QR code scanners - Detect Stickers when dropped, pasted or picked from Gallery - Modernize menus - Clearer icons - Clearer QR code reset options - Bug fixes and more These features will roll out over the coming days. Thanks for using Delta Chat!
Build 871850701v1.50.52025-01-19 10:17:35
- Append dropped URLs to text field instead of attaching as file - Drag images from a chat and drop it to another chat or even to another app (use a second finger for navigating!) - Paste .webp images via drag'n'drop - Add "Copy Image" to messages' conext menu - Long-tap a proxy to share or delete - More modern attach menu - "Message Info" is moved to messages' context menu at "More Options / ..." - To easier differ between multiple profiles, set a "Private Tag" (long tap profile switcher) - In profile switcher's context menu, you have quick access to "Mute Notifications" for a profile - Sort profiles to top in profile switcher, see context menu - Allow cancelling profile edits, force a name when editing profile - Fix scrolling issue when cancelling a screen - Fix layout of 'No contacts found' message These features will roll out over the coming days. Thanks for using Delta Chat!
Build 871679727v1.50.42025-01-11 22:51:54
- New widget to access favourite chats (requires iOS 17) - Modern look for the settings pages - New Notification settings screen - Option to toggle notifications for mentions - Long-tap links for copying to clipboard - Much smoother, motion reduced message list when using attach or other options - Lots of bug fixes These features will roll out over the coming days. Thanks for using Delta Chat!

No pricing data captured yet — comparisons appear once the app has paid storefronts or in-app purchases.

Availability 174 of 175 storefronts

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Not available in: CN

Change log 29 changes · US

releaseNotes updated
- "Calls" and "Channels" are available by default and are no longer experimental - Add outgoing ringing sound and call status - Resend the last 10 messages to n
description updated
Delta Chat is a reliable decentralized instant messenger that is easy and fun to use for friends, family, groups and organizations. Delta Chat is developed by a
subtitle updated
Decentral Private Messenger
name updated
Delta Chat
Version 2.53.0 released
- "Calls" and "Channels" are available by default and are no longer experimental - Add outgoing ringing sound and call status - Resend the last 10 messages to new broadcast channel member - Consistent outgoing image quality between images w
Version 2.52.0 released
- "Calls" and "Channels" are available by default and are no longer experimental - Resend the last 10 messages to new broadcast channel member - Enable PQC (Post-Quantum Cryptography) support. We do not generate PQC keys yet, this step is n
Version 2.51.1 released
- "Calls" and "Channels" are available by default and are no longer experimental - Resend the last 10 messages to new broadcast channel member - Enable PQC (Post-Quantum Cryptography) support. We do not generate PQC keys yet, this step is n
Version 2.49.2 released
Added an App Clip to handle an invite link in case the app wasn't installed yet.
Version 2.49.1 released
This version is a pure bugfix release: - When tapping an invite link, after app installation, offer corresponding chat - Fix: do not crash when swiping keyboard down - Fix: Mark a message as delivered only after it has been fully sent out -
Version 2.48.0 released
- Increase resilience of multi-relay usage: if on relay goes down, messages are still received in the others - In the chat list, swipe a read chat to the right to mark it "unread" - Allow to switch profile when sharing or forwarding - Add g
Version 2.43.0 released
- Faster preview and notifications of large messages - Improve "Connectivity View" - Truncate file names in the middle, not at the end; important information are more often at the end - Experimental calls are now native - Fix: Notifications
Version 2.35.0 released
- Scanning a QR code with a relay ask for adding it as additional transport - Ask for device owner verification on profile deletion - Better logging - Simplify automatic deletion options - Fix: Show input-bar after QR scan immediately - Fix
Version 2.33.0 released
- Handle additional relays - Improved metadata protection - Better multi-device: synchronize group creation across devices - Improve onboarding speed - Links in messages are now highlighted - Improve navigation in offline help - Lots of bug
Version 2.22.1 released
- Disappearing messages options range from 5 minutes to 1 year now - Share email address for email contacts instead of vCard - In case of errors, tapping message text or status opens "message info" directly - Flatten profile menu - Show pos
Version 2.11.0 released
- Allow to clone email chats - Fix: Prevent the drag preview from showing upside down when long pressing reaction on an image - Fix some small bugs - Add Estonian translation These features will roll out over the coming days. Thanks for us
Version 2.10.0 released
- In Delta Chat, version 2.x, everything is encrypted by default - no locks or other symbols required. - Version 2.x also comes with improved profiles Recent changes in 2.10.0: - Do not enlarge default icons as 'Saved Messages' or 'Device
Version 2.9.0 released
- Separate between unencrypted and encrypted chats, avoiding mixing of encrypted/unencrypted messages in the same chat - Removed padlocks, as encrypted is the default "normal" state. Instead, unencrypted email is marked with a small letter
Version 2.8.0 released
- Separate between unencrypted and encrypted chats, avoiding mixing of encrypted/unencrypted messages in the same chat - Removed padlocks, as encrypted is the default "normal" state. Instead, unencrypted email is marked with a small letter
Version 1.58.6 released
- Access "Media" by an dedicated icon in chat's upper right corner - "All Media" are available from the settings - Speed up opening profiles - Show "Disappearing Messages" state alrady in menu - Fix sending voice messages if "Settings / Cha
Version 1.58.5 released
- Fix notification sound - Fix bitrate for "worse" outgoing media quality - Save multiple selected messages in one go - Improve voice message UI These features will roll out over the coming days. Thanks for using Delta Chat!
Version 1.58.4 released
- Nicer profile, focusing on recognising contacts - Fix adding chats from different profiles to widget - Fix: Show errors if changing address fails - Fix long tapping chats on iPad These features will roll out over the coming days. Thanks
Version 1.58.3 released
- Select and send multiple images at the same time - Recode videos to reasonable quality and size - Attach images and videos as original files - Support pasted GIFs - Notifications in Notification Center are grouped by chat - More character
Version 1.58.1 released
- Modernise "Close" button in overlay sheets - Full-screen display of own avatar from "your profile" settings - Tapping info messages with contacts open the contact's profile - Hide superfluous "Show Classic E-mails" advanced setting for ch
Version 1.54.5 released
- Edit your messages - Delete your messages for everyone - Search "Saved Messages" from title bar (it was available in profile before) - Remove "Manage Keys" and "Import Autocrypt Setup Message"; use "Add Second Device" - Allow better avata
Version 1.54.3 released
• Accessibility: voice over reads a reaction summary for messages • Sync message and chat deletion to other devices • Allow scanning multiple QR-invitation codes without needing to wait for completion to scan the next one • Do not allow non
Version 1.54.0 released
- Improve "message menu": many options are now faster accessible - Unify buttons and icons - When forwarding to "Saved Messages", if possible, save the message including context - Option to copy scanned QR code text to clipboard - Fix "Add
Version 1.52.2 released
- Add option to "Save" a message to the messages' context menu - Saved messages are marked by a little star - In the "Saved Messages" chat, messages are shown in context and have an option to go to the original - The app now requires less s
Version 1.50.5 released
- Append dropped URLs to text field instead of attaching as file - Drag images from a chat and drop it to another chat or even to another app (use a second finger for navigating!) - Paste .webp images via drag'n'drop - Add "Copy Image" to m
Version 1.50.4 released
- New widget to access favourite chats (requires iOS 17) - Modern look for the settings pages - New Notification settings screen - Option to toggle notifications for mentions - Long-tap links for copying to clipboard - Much smoother, motion
expanded screenshot