Know your speed.
Every second.
Bolt Speedometer turns your iPhone into a precision GPS speed gauge — with a windshield HUD, DashCam, and complete trip history built in.
Free to download · iPhone
Everything your dashboard is missing.
One app, built to be the fastest, clearest speedometer on your phone.
Real-Time GPS Speedometer
Accurate, lag-free speed readings powered by your iPhone's GPS — no OBD dongle required.
Windshield HUD
Project your current speed onto the windshield for a heads-up, eyes-on-the-road view.
DashCam Recording
Capture your drives automatically with built-in DashCam recording, right alongside your speed data.
Trip History & Routes
Every trip is logged with route, distance, average speed, and duration — all in one screen.
MPH or KM/H
Switch instantly between imperial and metric units to match the way you drive.
Built for the road, glows in the dark.
A focused, high-contrast interface designed to be read at a glance — day or night.
See your speed without looking down
HUD mode mirrors your speed onto the windshield, so your eyes stay on the road.
DashCam that watches both ways
Record the road ahead and your cabin at once, with your live speed always on screen.
Every trip, mapped and remembered
Route, distance, duration, top speed, and average — saved automatically for every drive.
Get up to speed.
Download Bolt Speedometer free on the App Store, and let us know if you spot a bug or have an idea.