I was looking for an app that would substitute for the dedicated and expensive rangefinder device that’s used for judging long distances while hunting and golfing, when I came across
Android Boy’s remarkable all-in-one $2.50 Smart Tools. This product has taken the smartphone-as-tool concept to the next level by providing tools for length and angle; distance; compass, including metal detector; and sound, including dB meter and vibration. The construction bubble, or spirit level, is a classic example of smartphone accelerometer technology that detects tilt in relation to the earth’s ground plane.
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