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Mobile app · Self-hosting

Gravel

A de-googled, hardened fork of the Pebble companion app for de-googled phones.

  • Free, with trade-offs
  • Android
  • Open source

Overview

Gravel is a firmware update mobile app, available on Android.

Features described in its F-Droid listing and in its GitHub repository: voice input and commands, reminders and due dates.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “The watch features are here: pairing, notifications and replies, calendar, music, health, weather, watchfaces and apps, firmware updates, and voice dictation.” — F-Droid, 10 November 2026
  • “The watch features are here: pairing, notifications and replies, calendar, music, health, weather, watchfaces and apps, firmware updates, and voice dictation.” — F-Droid, 10 November 2026
  • “The Notebook stores voice and typed notes and reminders on the phone (Android 9 and newer; voice notes also need a processor that can run both engines).” — F-Droid, 10 November 2026
  • “Notes are stored encrypted, and backups are encrypted files written where you choose.” — F-Droid, 10 November 2026

At a glance

Gravel is free, with trade-offs: it relies on a non-free online service.

Its licence (GPL-3.0) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • No advertising
  • Commercial use allowed

Weaknesses

  • Flagged by F-Droid: relies on a non-free online service

Sources and checks

  • Facts collected from F-Droid (credit card, source code, publisher, licence, free status, platforms, ads, commercial use, version) —
  • Last technical check: 5 November 2026
  • Description from F-Droid — F-Droid (citation courte)

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