TrackerMap is a free/open-source app that allows you to connect to any Traccar server in order to track your GPS devices.

Features:
- Locate and filter your GPS devices.
- Get reports (positions, events, and stops) and export them to XLSX.
- Send remote commands to your devices.
- Get push notifications of events.

The source code of this app is publicly available and licensed under the AGPLv3, which means you can do whatever you want with it, as long as you always release the source code with your modifications under the same license.

Source code: https://git.sr.ht/~avalos/trackermap-mobile