The Ultimate Car Speedometer App for Safe Driving: SpeedX

Your Phone as a HUD Speedometer

Modern cars have digital dashboards, but many older vehicles still rely on analog gauges that can be hard to read or slightly inaccurate. SpeedX transforms your iPhone into a crystal-clear digital speedometer with a heads-up display (HUD) mode that's visible day or night.

Key Features for Drivers

Speed Alerts Set custom speed thresholds and receive audio warnings when you exceed them. Perfect for maintaining safe speeds in variable limit zones.

HUD Mode Flip your phone's display to reflect off your windshield for a genuine heads-up experience. SpeedX reverses the display so it reads correctly when mirrored.

GPS-Based Accuracy Unlike your car's mechanical speedometer which can read 5-10% high due to tire wear and manufacturing tolerances, SpeedX calculates speed from GPS satellite data for true ground speed.

Units Tailored to You

Switch instantly between:

• km/h — Standard in most countries
• mph — US and UK preference
• knots — For nautical navigation
• m/s — Scientific and sports applications

Safety First

SpeedX is designed to be glanceable. Large, high-contrast digits mean you spend less time looking away from the road. Voice announcements keep you informed without taking your eyes off driving.

Download SpeedX today and experience a professional-grade digital speedometer that works in any vehicle, anywhere, completely offline.