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OpenAssistant

A simple, open-source local AI app.
A simple, open-source local AI app.

Uses 3.5GB RAM when active.

Features:
- multiple chats
- tool calling (works with several other apps in the Modern Apps ecosystem)
- streaming long responses
- multimodal input (photo upload & audio recording)
- markdown formatted text output
  • app screenshot
  • app screenshot

Versions

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 v2.5.4 (20260615) suggested Added on Jun 18, 2026

    arm64-v8a

    This version requires Android 12 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • 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.
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "dataSync"
      Allows the app to make use of foreground services with the type "dataSync"
    • run foreground service with the type "specialUse"
      Allows the app to make use of foreground services with the type "specialUse"
    • 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.
    • show notifications
      Allows the app to show notifications
    • Read calendar events and details
      This app can read all calendar events stored on your phone and share or save your calendar data.
    • read your contacts
      Allows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
    • 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.
    • record audio
      This app can record audio using the microphone while the app is in use.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • add or modify calendar events and send email to guests without owners' knowledge
      This app can add, remove, or change calendar events on your phone. This app can send messages that may appear to come from calendar owners, or change events without notifying their owners.
    • modify your contacts
      Allows the app to modify the data about your contacts stored on your phone. This permission allows apps to delete contact data.
    • com.vayunmathur.calendar.permissions.ACCESS_CALENDAR
    • com.vayunmathur.contacts.permissions.ACCESS_CONTACTS
    • com.vayunmathur.email.permissions.ACCESS_EMAIL
    • com.vayunmathur.findfamily.permissions.ACCESS_FAMILY
    • com.vayunmathur.music.permissions.ACCESS_MUSIC
    • com.vayunmathur.notes.permissions.ACCESS_NOTES
    • com.vayunmathur.openassistant.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 66 MiB PGP Signature | Build Log

  • Version v2.5.3 (20260612) - Added on Jun 14, 2026

    arm64-v8a

    This version requires Android 12 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • 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.
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "dataSync"
      Allows the app to make use of foreground services with the type "dataSync"
    • run foreground service with the type "specialUse"
      Allows the app to make use of foreground services with the type "specialUse"
    • 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.
    • show notifications
      Allows the app to show notifications
    • Read calendar events and details
      This app can read all calendar events stored on your phone and share or save your calendar data.
    • read your contacts
      Allows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
    • 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.
    • record audio
      This app can record audio using the microphone while the app is in use.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • add or modify calendar events and send email to guests without owners' knowledge
      This app can add, remove, or change calendar events on your phone. This app can send messages that may appear to come from calendar owners, or change events without notifying their owners.
    • modify your contacts
      Allows the app to modify the data about your contacts stored on your phone. This permission allows apps to delete contact data.
    • com.vayunmathur.calendar.permissions.ACCESS_CALENDAR
    • com.vayunmathur.contacts.permissions.ACCESS_CONTACTS
    • com.vayunmathur.email.permissions.ACCESS_EMAIL
    • com.vayunmathur.findfamily.permissions.ACCESS_FAMILY
    • com.vayunmathur.music.permissions.ACCESS_MUSIC
    • com.vayunmathur.notes.permissions.ACCESS_NOTES
    • com.vayunmathur.openassistant.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 66 MiB PGP Signature | Build Log

  • Version v2.5.2 (20260604) - Added on Jun 05, 2026

    arm64-v8a

    This version requires Android 12 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • 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.
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "dataSync"
      Allows the app to make use of foreground services with the type "dataSync"
    • run foreground service with the type "specialUse"
      Allows the app to make use of foreground services with the type "specialUse"
    • 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.
    • show notifications
      Allows the app to show notifications
    • Read calendar events and details
      This app can read all calendar events stored on your phone and share or save your calendar data.
    • read your contacts
      Allows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
    • 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.
    • record audio
      This app can record audio using the microphone while the app is in use.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • add or modify calendar events and send email to guests without owners' knowledge
      This app can add, remove, or change calendar events on your phone. This app can send messages that may appear to come from calendar owners, or change events without notifying their owners.
    • modify your contacts
      Allows the app to modify the data about your contacts stored on your phone. This permission allows apps to delete contact data.
    • com.vayunmathur.calendar.permissions.ACCESS_CALENDAR
    • com.vayunmathur.contacts.permissions.ACCESS_CONTACTS
    • com.vayunmathur.findfamily.permissions.ACCESS_FAMILY
    • com.vayunmathur.music.permissions.ACCESS_MUSIC
    • com.vayunmathur.notes.permissions.ACCESS_NOTES
    • com.vayunmathur.openassistant.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 63 MiB PGP Signature | Build Log

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