Free for 5th Anniversary of App Store until the 10th!
Speedometer+:
• places a highly accurate speedometer in the palm of your hand
• dedicated faces for mph, km/h, knots
• displays current speed with both an analog and digital readout
• records your maximum speed for a session
• ability to lock your maximum speed so it's not overwritten by
a new maximum speed
• ability to share your maximum speed with friends
• ability to reset your maximum speed in order to record a new
session
• high level of contrast in order to easily see in the daylight
• clear GPS accuracy indicator
• trip meter to measure distance you have traveled
• toggle a setting to keep measuring max speed & trip while
you're using other apps
• digital readout records up to 999 mph, 999 km/h, 99.9 knots

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Great for the following:
• driving
• on a train
• sailing/boating
• motorcycle rides
• plane rides
• anything where you want to measure speed

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Best results:
The accuracy of this speedometer is subject to the accuracy of the GPS
on your iPhone. Our GPS accuracy indicator helps you quickly see when
you're getting a good signal when the green light is on. The following
general rules will help you quickly get a good GPS signal:

• keep the unit in the line of sight of the sky
• try to stay close to the same position for a few moments
while the device gets a GPS lock
• even with a good GPS signal reading, the unit may take a
little bit of time on startup to get a GPS lock on especially when you
are moving fast

Note: Continued use of GPS running in the background can dramatically decrease battery life.