Thread: [UX] GPS Speed Calibration for 64bit iGO Luna / NextGen

Thank you for your interest!
You are right that car speedometers are not perfectly accurate either. However, the purpose of this module is different — it corrects the discrepancy between the GPS speed and the car's odometer reading, which in our case was consistently around 8%.
This specific discrepancy is common in older vehicles and can be caused by tire wear, non-standard wheel size, or simply the GPS receiver's characteristics on a particular device.
It is important to note that the module does not interfere with the raw GPS data in any way. The GPS receiver continues to calculate and report speed exactly as before. What the module does is apply a visual multiplier to the displayed speed — the number you see on screen, and the threshold at which overspeed warnings are triggered. Think of it as adjusting the needle on an analog gauge without touching the engine — the underlying data remains untouched.
Regarding arrival time estimation — yes, this is an additional benefit. When the displayed speed matches the actual vehicle speed more closely, route calculations and ETA should be more accurate.
The module does not claim to achieve absolute speed accuracy. It simply provides the driver with a simple tool to adjust the displayed speed to match what they observe in real driving conditions. The default value of 108% is our specific case — each user should calibrate it individually for their vehicle and device.