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Bondwidth

Private, offline phone & contacts app that helps you keep up your bonds
New in version 1.0.0
First F-Droid release of Bondwidth — a private, fully offline phone, contacts and relationship app. Includes the default dialer with its own in-call UI, a full contacts manager, and per-person check-in cadences with birthday and anniversary reminders. Everything runs on-device with no network access.
Bondwidth is an all-in-one phone, contacts, and relationship app that works entirely on your device. No accounts, no servers, no tracking — and it quietly helps you stay close to the people who matter.

Friendship is small attentions, often. Set a check-in cadence for each person and Bondwidth gently flags who's getting too quiet, so you can reach out before silence becomes a habit. Birthdays and anniversaries are remembered for you, and the calls you make are counted automatically.

Private by design

* No internet permission at all — the app cannot reach the network, and its build pipeline fails if that ever changes.
* No accounts, no servers, no cloud. Everything stays in the app's private storage on your device.
* No analytics, no ads, no third-party trackers.
* Optional encrypted backups (AES-256-GCM) that only you can open.
* Optional biometric app lock and a "hide from screenshots" mode.

Phone

* Default dialer with its own in-call screen, Picture-in-Picture, and per-contact ringtones.
* T9 smart dial, speed dial, and dual-SIM call routing.
* Block numbers, missed-call notifications, call history and search.
* Colour-coded call directions, with optional WhatsApp / Signal shortcuts.

Contacts

* Browse, create, edit and delete contacts, with group filtering.
* Typed phone numbers, emails, postal address, website, organisation, notes and birthday.
* Find and merge duplicates; import and export vCard files.

Bonds

* Per-person check-in cadence with gentle overdue nudges.
* Birthday and anniversary reminders, with a "Mark as wished" action.
* An interaction timeline and an at-a-glance relationship dashboard.
* A home-screen widget for upcoming occasions and who you haven't spoken to lately.

Bondwidth is free software (GPL-3.0). Its phone and contacts features are derived from the Fossify Phone and Fossify Contacts projects.
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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 1.0.0 (1) suggested Added on Jul 18, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 8.0 or newer.

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

    Permissions
    • answer phone calls
      Allows the app to answer an incoming phone call.
    • directly call phone numbers
      Allows the app to call phone numbers without your intervention. This may result in unexpected charges or calls. Note that this doesn't allow the app to call emergency numbers. Malicious apps may cost you money by making calls without your confirmation.
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "phoneCall"
      Allows the app to make use of foreground services with the type "phoneCall"
    • route calls through the system
      Allows the app to route its calls through the system in order to improve the calling experience.
    • change your audio settings
      Allows the app to modify global audio settings such as volume and which speaker is used for output.
    • show notifications
      Allows the app to show notifications
    • read call log
      This app can read your call history.
    • 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.
    • read phone numbers
      Allows the app to access the phone numbers of the device.
    • read phone status and identity
      Allows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
    • 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.
    • use biometric hardware
      Allows the app to use biometric hardware for authentication
    • use fingerprint hardware
      Allows the app to use fingerprint hardware for authentication
    • display notifications as full screen activities on a locked device
      Allows the app to display notifications as full screen activities on a locked device
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • write call log
      Allows the app to modify your phone's call log, including data about incoming and outgoing calls. Malicious apps may use this to erase or modify your call log.
    • 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.phonepvr.friends.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 14 MiB PGP Signature | Build Log

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