Bondwidth

Bondwidth

Private, offline phone & contacts app that helps you keep up your bonds

phonepvr Contact Phone & SMS

Download (15 MB)

Screenshots

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Description

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.

What’s new (1.1.1)

Fixes the app closing right after a fresh install, or whenever contacts access is not granted. Fixes a crash opening call history without call-log access. Fixes "App not installed" when updating a test build downloaded from GitHub: releases now install over those builds and keep your data. Test builds now install separately as "Bondwidth (dev)".

Versions

Version Date Size Requires Android Download
1.1.1 current
91d6e23d1d3879b4…
 2026-10-15 15 MB API 26
1.1.0
22c147231496ae43…
 2026-10-12 15 MB API 26
1.0.0
714cf7b20b05cf20…
 2026-07-18 15 MB API 26

Permissions

What the app asks the system for. Android only grants sensitive access after you confirm it.

  • Read contactsAccess the address book.
  • Change contactsCreate and change address book entries.
  • READ_CALL_LOG
  • WRITE_CALL_LOG
  • Place callsCall phone numbers without asking again.
  • Phone stateDetect ongoing calls and read device information.
  • READ_PHONE_NUMBERS
  • MANAGE_OWN_CALLS
Show 11 more permissions
  • ANSWER_PHONE_CALLS
  • Foreground serviceKeep running in the background, visible in the status bar.
  • FOREGROUND_SERVICE_PHONE_CALL
  • Prevent sleepingKeep the device from going to sleep.
  • Audio settingsAdjust volume and audio output.
  • USE_FULL_SCREEN_INTENT
  • NotificationsShow notifications.
  • BiometricsUnlock with fingerprint or face.
  • FingerprintUnlock with a fingerprint.
  • Run at startupStart automatically after the device is switched on.
  • friends.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

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