Định Vị 24h is a free Android travel and navigation app developed by Tracking System. It offers a comprehensive real-time tracking system that allows users to monitor and save real-time movement, simulate history, and draw routes from their location to their vehicle. The app has an automatic login feature and a power-saving mode for extended use.

With Định Vị 24h, users can update the status of their vehicles continuously and receive alerts from their devices, such as entering or exiting monitored areas, device vibrations, and power on/off. The app also supports anti-theft features through phone calls and supports multiple monitoring areas.

Overall, Định Vị 24h is a reliable and effective GPS tracking app for Android users who want to keep track of their vehicles for safety and security purposes. The app is easy to use and has a user-friendly interface that makes it accessible to anyone.