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.