Delta Chat

Communicate instantly via e-mail

Delta Chat is a messaging app that is completely compatible with the existing e-mail infrastructure.

So, with Delta Chat you get the ease of well-known messengers with the reach of e-mail. Moreover, you're independent from other companies or services -- as your data are not related to Delta Chat, you won't even add new dependencies here.

Some features at a glance:

  • Secure with automatic end-to-end-encryption, supporting the new Autocrypt standard
  • Fast by the use of Push-IMAP
  • Largest userbase -- receivers not using Delta Chat can be reached as well
  • Compatible -- not only to itself
  • Elegant and simple user interface
  • Distributed system
  • No Spam -- only messages of known users are shown by default
  • Reliable -- safe for professional use
  • Trustworthy -- can even be used for business messages
  • Fully OpenSource and Standards based

Donate

Packages

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 0.510.1 (550) - Added on 2019-07-11

    This version requires Android 4.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • read your contacts
      Allows the app to read data about your contacts stored on your phone, including the frequency with which you've called, emailed, or communicated in other ways with specific individuals. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • take pictures and videos
      This app can take pictures and record videos using the camera at any time.
    • access approximate location (network-based) only in the foreground
      This app can get your location based on network sources such as cell towers and Wi-Fi networks, but only when the app is in the foreground. These location services must be turned on and available on your phone for the app to be able to use them.
    • access precise location only in the foreground
      This app can get your exact location only when it is in the foreground. These location services must be turned on and available on your phone for the app to be able to use them. This may increase battery consumption.
    • record audio
      This app can record audio using the microphone at any time.
    • change your audio settings
      Allows the app to modify global audio settings such as volume and which speaker is used for output.
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • control vibration
      Allows the app to control the vibrator.
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • android.permission.INSTALL_SHORTCUT
    • view Wi-Fi connections
      Allows the app to view information about Wi-Fi networking, such as whether Wi-Fi is enabled and name of connected Wi-Fi devices.
    • set wallpaper
      Allows the app to set the system wallpaper.
    • android.permission.RAISED_THREAD_PRIORITY
    • ask to ignore battery optimizations
      Allows an app to ask for permission to ignore battery optimizations for that app.
    • com.sec.android.provider.badge.permission.READ
    • com.sec.android.provider.badge.permission.WRITE
    • com.htc.launcher.permission.READ_SETTINGS
    • com.htc.launcher.permission.UPDATE_SHORTCUT
    • com.sonyericsson.home.permission.BROADCAST_BADGE
    • com.sonymobile.home.permission.PROVIDER_INSERT_BADGE
    • com.anddoes.launcher.permission.UPDATE_COUNT
    • com.majeur.launcher.permission.UPDATE_BADGE
    • com.huawei.android.launcher.permission.CHANGE_BADGE
    • com.huawei.android.launcher.permission.READ_SETTINGS
    • com.huawei.android.launcher.permission.WRITE_SETTINGS
    • android.permission.READ_APP_BADGE
    • com.oppo.launcher.permission.READ_SETTINGS
    • com.oppo.launcher.permission.WRITE_SETTINGS
    • me.everything.badger.permission.BADGE_COUNT_READ
    • me.everything.badger.permission.BADGE_COUNT_WRITE
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.

    Download APK 25 MiB PGP Signature

  • Version 0.500.0 (548) - Added on 2019-07-02

    This version requires Android 4.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • read your contacts
      Allows the app to read data about your contacts stored on your phone, including the frequency with which you've called, emailed, or communicated in other ways with specific individuals. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • take pictures and videos
      This app can take pictures and record videos using the camera at any time.
    • access approximate location (network-based) only in the foreground
      This app can get your location based on network sources such as cell towers and Wi-Fi networks, but only when the app is in the foreground. These location services must be turned on and available on your phone for the app to be able to use them.
    • access precise location only in the foreground
      This app can get your exact location only when it is in the foreground. These location services must be turned on and available on your phone for the app to be able to use them. This may increase battery consumption.
    • record audio
      This app can record audio using the microphone at any time.
    • change your audio settings
      Allows the app to modify global audio settings such as volume and which speaker is used for output.
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • control vibration
      Allows the app to control the vibrator.
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • android.permission.INSTALL_SHORTCUT
    • view Wi-Fi connections
      Allows the app to view information about Wi-Fi networking, such as whether Wi-Fi is enabled and name of connected Wi-Fi devices.
    • set wallpaper
      Allows the app to set the system wallpaper.
    • android.permission.RAISED_THREAD_PRIORITY
    • ask to ignore battery optimizations
      Allows an app to ask for permission to ignore battery optimizations for that app.
    • com.sec.android.provider.badge.permission.READ
    • com.sec.android.provider.badge.permission.WRITE
    • com.htc.launcher.permission.READ_SETTINGS
    • com.htc.launcher.permission.UPDATE_SHORTCUT
    • com.sonyericsson.home.permission.BROADCAST_BADGE
    • com.sonymobile.home.permission.PROVIDER_INSERT_BADGE
    • com.anddoes.launcher.permission.UPDATE_COUNT
    • com.majeur.launcher.permission.UPDATE_BADGE
    • com.huawei.android.launcher.permission.CHANGE_BADGE
    • com.huawei.android.launcher.permission.READ_SETTINGS
    • com.huawei.android.launcher.permission.WRITE_SETTINGS
    • android.permission.READ_APP_BADGE
    • com.oppo.launcher.permission.READ_SETTINGS
    • com.oppo.launcher.permission.WRITE_SETTINGS
    • me.everything.badger.permission.BADGE_COUNT_READ
    • me.everything.badger.permission.BADGE_COUNT_WRITE
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.

    Download APK 26 MiB PGP Signature

  • Version 0.304.0 (547) - Added on 2019-05-09

    This version requires Android 4.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • read your contacts
      Allows the app to read data about your contacts stored on your phone, including the frequency with which you've called, emailed, or communicated in other ways with specific individuals. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • take pictures and videos
      This app can take pictures and record videos using the camera at any time.
    • access approximate location (network-based) only in the foreground
      This app can get your location based on network sources such as cell towers and Wi-Fi networks, but only when the app is in the foreground. These location services must be turned on and available on your phone for the app to be able to use them.
    • access precise location only in the foreground
      This app can get your exact location only when it is in the foreground. These location services must be turned on and available on your phone for the app to be able to use them. This may increase battery consumption.
    • record audio
      This app can record audio using the microphone at any time.
    • change your audio settings
      Allows the app to modify global audio settings such as volume and which speaker is used for output.
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • control vibration
      Allows the app to control the vibrator.
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • android.permission.INSTALL_SHORTCUT
    • view Wi-Fi connections
      Allows the app to view information about Wi-Fi networking, such as whether Wi-Fi is enabled and name of connected Wi-Fi devices.
    • set wallpaper
      Allows the app to set the system wallpaper.
    • android.permission.RAISED_THREAD_PRIORITY
    • ask to ignore battery optimizations
      Allows an app to ask for permission to ignore battery optimizations for that app.
    • com.sec.android.provider.badge.permission.READ
    • com.sec.android.provider.badge.permission.WRITE
    • com.htc.launcher.permission.READ_SETTINGS
    • com.htc.launcher.permission.UPDATE_SHORTCUT
    • com.sonyericsson.home.permission.BROADCAST_BADGE
    • com.sonymobile.home.permission.PROVIDER_INSERT_BADGE
    • com.anddoes.launcher.permission.UPDATE_COUNT
    • com.majeur.launcher.permission.UPDATE_BADGE
    • com.huawei.android.launcher.permission.CHANGE_BADGE
    • com.huawei.android.launcher.permission.READ_SETTINGS
    • com.huawei.android.launcher.permission.WRITE_SETTINGS
    • android.permission.READ_APP_BADGE
    • com.oppo.launcher.permission.READ_SETTINGS
    • com.oppo.launcher.permission.WRITE_SETTINGS
    • me.everything.badger.permission.BADGE_COUNT_READ
    • me.everything.badger.permission.BADGE_COUNT_WRITE
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.

    Download APK 24 MiB PGP Signature