Surprisingly accurate. When I go smoothly CW, measuring out 180 degrees in about 4 seconds, I often get within 1 degree. When I go CCW, however, it seems to be no better than 2 degrees, and often 3 or 4 degrees off. This is still around 2% accuracy, which is very good. I get this kind of error routinely, even if I let the gyro stabilize to minimize drift. It thus might be necessary to have two calibration values: one for CW and one for CCW turns.
I am also having troubles seeing that the calibration I'm setting is doing anything. While I really like the concept of how you calibrate it, it is a unclear when exactly it is using the calibration for its output. Since calibrating depends on measuring the angle with calibration off, it should be very straight-foward to have calibration on or off in the settings, and even to have a color indication in the goniometer view itself so that we know calibration is or isn't taken into account.
Other than that, I only have one small feature request: present a drop-down menu of angle formatting choices, since there are so many to toggle through.
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PaplooTheLearned
John 542
Mel Sydney
Adrian232
