The "Real-Time Altitude Measurement Tool" is a GPS toolbox designed for iPhone users, developed by 俊芳 付. This app aims to enhance your outdoor activities by leveraging your phone's GPS capabilities. It provides real-time altitude measurements, speedometer features including speedometer, odometer, and speeding alerts, accurate compass display of current direction, latitude and longitude queries supporting map annotations, and route planning with simulated route calculation.

Experience a variety of tools combined in this app, all focused on simplicity and practicality. Download now for a user-friendly GPS experience.

• *Note:** Using the GPS speed measurement service requires continuous location tracking in the background to provide real-time speed and cumulative mileage information, which may consume more battery and affect battery life.