# Sentinel

> Background GPS tracker. Sends your location via SMS and Telegram.

Canonical page: [https://chrome-stats.com/d/io.github.marco\_zanella.sentinel](https://chrome-stats.com/d/io.github.marco_zanella.sentinel)

## Overview

- **ID:** `io.github.marco_zanella.sentinel`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Marco Zanella
- **Category:** TOOLS
- **Last updated:** 2026-06-18
- **First published:** 2026-06-18
- **Publisher country:** IT
- **Data as of:** 2026-09-11
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=io.github.marco_zanella.sentinel)
- **Website:** [https://marco-zanella.github.io/sentinel/](https://marco-zanella.github.io/sentinel/)
- **Privacy policy:** [https://marco-zanella.github.io/sentinel/privacy.html](https://marco-zanella.github.io/sentinel/privacy.html)

## Description

Sentinel runs silently in the background and periodically delivers your device&#39;s GPS location to the people you choose.<br><br>  Configure recipients in priority-ordered groups. Each ping includes your coordinates, accuracy radius, and a Google Maps link. If the primary group fails to deliver, Sentinel automatically falls back to the next one.<br><br>  Recipient types:<br>  • SMS — sent directly from your device<br>  • Telegram — via a bot you control<br><br>  Features:<br>  • Configurable tracking interval (1 to 60 minutes)<br>  • Manual &quot;Send Now&quot; for on-demand delivery<br>  • Delivery log with full history<br>  • Battery optimisation exemption prompt for reliable background operation<br>  • Device name label in every message<br><br>  Sentinel stores nothing on external servers. Your location goes only to the recipients you configure.<br>  - Screenshots — you need at least 2 phone screenshots. Connect your device, open the app, take screenshots of the home screen and the configuration screen. Transfer them to your computer and upload them here. Minimum size: 320×568 px, maximum: 3840×3840 px.<br>  - Feature graphic — a 1024×500 px banner image. Can be simple: your app icon on an indigo background with the word &quot;Sentinel&quot; in white. Any image editor works; even a quick Inkscape file is fine.

## Rankings

- #3,171,310 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/io.github.marco_zanella.sentinel)