Speedometer Not yet rated

Speed shown rarely came close to real speed. I tested it by driving exactly 90 kph for about 5 mins. Speed shown fluctuated constantly between about 40 & 110. Most worrying of all was my top speed of 168!!! Will visit again at a later release.

One day I realised my car odometers were failing when my car got hot. I was using another app that tracked my running speed when I exercised and thought I could use my phone to get away with not incurring a speeding fine before I could afford the proper repair for the car. When my odomoters did work there was at most 2-3k's difference between the odometer speed and phone speed. This just shows the power of the iPhone.

Not bad at all for the price. I gave it a quick go this morning to see if I could calibrate my speedometer with it, and found that the results jumped around a bit from 65km/h up to 73km/h a bit faster than I think my car can actually accelerate - and I was trying to drive steadily at the time! But mostly it was pretty smooth. I'd like to see landscape mode as that's how it best fits on my dash, and maybe there's a bit more work to do on filtering the results. I think I only paid $1.19 (can't see the price while doing my review!) so seems like good value to me.