NitroHUD Guide
Why the car reads faster than GPS, what the accuracy figure means, how to set up a windshield HUD at night, and how honest a phone acceleration timer can be.
- GPS speed versus the speedometer in the dashboardCar speedometers are legally required to never under-read, so they exaggerate. What GPS actually measures, when it is the better number, and when it is not.
- What the GPS accuracy figure actually tells youThe plus-or-minus metres on your screen is a confidence radius, not an error bar for speed. What changes it, what makes it lie, and when to distrust the reading.
- Setting up a phone head-up display that actually worksWhy the readout has to be mirrored, where the phone should sit, what a night display should look like, and the limits of a reflection on glass.
- How honest can a phone acceleration timer be?One fix per second, a start that has to be detected, and no rollout allowance. What a phone acceleration timer can measure honestly and what it cannot.
- What a g-force meter is really showing youWhat one g means, what a road car really pulls under braking and cornering, why calibration matters, and how to tell a real peak from a pothole.
- Reading km/h, mph and trip odometersThe exact conversion, a table for the speeds that matter, and why a satellite trip counter and the car's odometer never quite agree.
- Trip logs, CSV and GPX: what to export and whyWhat each format holds, which one to use for spreadsheets and which for maps, and why keeping the log on the phone is the point rather than a limitation.
- Keeping the screen on without cooking the phoneA bright display and a satellite receiver are a real load. What drains the battery in a car, why charging in sunlight is the worst case, and how to avoid it.
A speedometer you can read at a glance, and a head-up display your windshield reflects. NitroHUD shows GPS speed with the accuracy figure printed beside it, mirrors the readout for windshield use at night, logs the trip you are on, and times acceleration runs with your personal bests kept. No ads, no account, and trips stay on the phone.
Get NitroHUD on Google PlayAbout NitroHUDThese guides explain how satellite positioning, phone sensors and car instruments behave in general. Figures are typical values, not promises about your vehicle or your device. Nothing here is driving advice: obey the speed limits and the traffic rules where you are, keep your view of the road clear, and carry out any acceleration or braking test only where it is legal and safe to do so.