Ever wanted to practice reading a vernier caliper but didn't have a set? No worries, now you can practice on any Android device using this free and easy app. Just slide your finger across to grip the red object and take your reading. Enter your guess and press "Check My Answer" to see if you got it right.

If you ever need help, press the "Teach Me" button and the correct scale lines to read will be highlighted by red arrows.

Keep practicing and you'll be able to read the vernier caliper like a pro!