Safe Speed shows your current speed from your built-in GPS. This is a very accurate way to determine if your car speedometer is accurate. Also below your current speed is your speed averaged over a 5 second period to yield even more precise results, so long as you can keep your car at a constant speed.Compatible with: Android 2.2+ including Honeycomb Tablets!Future Updates:1. Ability to change units (Mph, m/s, and Kph)2. Show graph of speed changes and elevation changes.3. Output trip into Google Earth KML format.4. Alert Driver to over-speeding set by the user.