Practice gives you a fixed number of untimed questions with immediate answer feedback. Timed Round asks you to complete as many conversions as possible before the round clock expires. Speed Challenge gives every question its own time limit.
Difficulty changes the lengths being converted. Easy uses whole numbers from 1–100 meters or 3–330 feet. Medium uses one decimal place from 1.0–300.0 meters or 3.0–1000.0 feet. Hard can use two decimal places from 0.50–1000.00 meters or 2.00–3300.00 feet.
Answer Precision controls how your answer is rounded. One international foot equals exactly 0.3048 meter. To convert meters to feet, divide by 0.3048; to convert feet to meters, multiply by 0.3048. The app uses exact rational arithmetic, then checks whether your numeric answer rounds to the required precision.
When Both Directions is selected, questions alternate unpredictably between meters-to-feet and feet-to-meters. Equivalent numeric formatting is accepted, so an answer such as 62.10 is treated the same as 62.1 when appropriate.
You can press Enter to submit, P to pause, or Esc to end the current round. Timers pause automatically when the page is hidden.