Reference
Guides
How satellite speed measurement actually works, and how to get good numbers out of it.
- Sept 2026How accurate is a GPS speedometer?Doppler vs position, and what the accuracy number is actually telling you.
- Oct 2026Is GPS Speed More Accurate Than Your Speedometer?The legal reason your dashboard is optimistic, and by how much.
- Oct 2026Using HUD mode safelyTurning a phone and a windscreen into a heads-up display.
- Sept 2026How Fast Is a Knot? Knots to mph and km/h for BoatsWhy the sea measures speed differently, and how to read it.
- Sept 2026Tracking cycling speed with your phoneA bike computer you already own, and the stats that matter.
- Sept 2026Speedometer Stuck at 0? Fix Location on iPhone and AndroidWhat to tap when the browser says location is blocked or the dial will not leave 0.