Hinge Caliper

Hinge Caliper turns the hinge of iPhone Duo into a measuring tool. IMPORTANT: The caliper and protractor use the iPhone Duo hinge and only work on iPhone Duo. On other iPhone models, only the bubble levels and on-screen rulers are available. CALIPER (iPhone Duo only) Close your iPhone Duo on an object so it touches the outer edges of both halves. Hinge Caliper works out the object's thickness from the hinge angle. Hold still for a moment and the reading locks: your iPhone vibrates and speaks the measurement and hinge angle, so you don't need to see the screen. For best accuracy, calibrate once with an object of known size. PROTRACTOR (iPhone Duo only) See the exact opening angle of your iPhone Duo, from 0° to 180°, on a clear protractor dial. OUTER DISPLAY (iPhone Duo only) Optionally show the angle and caliper reading on the outer display while you work. iOS only allows this while the…