Blog
A free, browser-based GPS speedometer. Live speed, trip stats, and a HUD mode — no app install, no account, no tracking of your location beyond your own device.
Boating & Marine
Reading Boat Speed in Knots: A Beginner's Guide
Knots are nautical miles per hour, not a mysterious unit. Here is what boaters need to know about GPS speed-over-ground.
Running & Fitness
Using GPS Pace Tracking to Improve Your Running
Pace is just speed turned inside out. Here is how to read it well and avoid the most common GPS running mistakes.
Cycling
GPS Speed Tracking for Cyclists: What Actually Matters
No sensor or bike computer required — here is what to know about tracking cycling speed with GPS alone.
Device & App Tips
Does GPS Work Without a SIM Card or Internet Connection?
Yes — GPS itself needs no internet. Here is the difference between GPS and the network assistance that speeds up your first fix.
GPS Accuracy
How GPS Calculates Your Speed (And Why It Isn't Always Exact)
GPS speed comes from measuring your position changes over time, not a radar gun. Here is how it actually works.