Translation guide
A pedometer is a device that counts steps. In Japanese, the most common term is 歩数計 (ほすうけい), but 万歩計 (まんぽけい) is also widely used, especially for consumer devices. The loanword ペドメーター is understood but less common.
Referring to a device that counts the number of steps taken, such as a fitness tracker or a simple mechanical counter.
Standard term for a pedometer. Literally 'step count meter'. Used in technical and general contexts.
I wear a pedometer and walk every day.
Common term for a pedometer, especially consumer models. Literally '10,000-step meter', reflecting the popular goal of 10,000 steps per day.
Loanword from English. Recognized but less common than 歩数計 or 万歩計. May be used in technical or fitness contexts.
This pedometer accurately counts steps.
万歩計を買って、毎日一万歩を目指しています。
I bought a pedometer and aim for 10,000 steps every day.
I use the pedometer function on my smartphone.