A free app for Android, by 639663675.

In order to give users a comprehensive and practical experience, the Android app wwfit integrates the data and services of wearable technology. You can use the wwfit application to make actual bluetooth voice calls, send and receive SMS, as well as push third-party app messages in real-time.

Additionally, you can use this app to track your heart rate while sleeping, GPS running, and daily exercise steps. You can also use it to add up the data you have daily, weekly, and monthly. This app is available in a variety of languages, including Chinese, English, German, French, Japanese, Russian, Spanish, Italian, Malaysian, Polish, Portuguese, Korean, Thai, and Vietnamese.