Battery Tracker BTR is a free iPhone application developed by Antigravity Batteries LLC. It falls under the category of Utilities & Tools and serves as a helpful tool for monitoring the real-time voltage of vehicle batteries.

With Battery Tracker BTR, users can easily keep track of their car battery's health. The app provides valuable information by testing the cranking and charging system voltage, allowing users to gauge the battery's condition. The real-time data can be conveniently displayed on a mobile device through the use of Bluetooth connectivity.

Battery Tracker BTR offers a simple and intuitive interface, making it accessible to users of all levels of technical expertise. Whether you are a car enthusiast or simply want to ensure the reliability of your vehicle's battery, this application provides a convenient solution for monitoring your battery's voltage in real-time.