According to the developers, the error is only ±3 km/h for users of the paid Pro version.
For the free database, the error is around 10%.
PROPAGATION AND REACTIONS
The app is already available in the UK, but it is not yet available in the French App Store and is marked as unavailable for Android.
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It was created by a British team to improve road safety “by drawing attention to the problem of speeding.”
However, this has raised concerns among some drivers about possible abuse and “occasional” reporting.
