An activity tracker is a useful tool for you to keep track of your workout. It has a built-in sleep tracker so you can measure your sleep quality.
From Amazon
Fitbit Charge 3 special edition with NFC The innovative health and fitness tracker, frost white/aluminium/graphite grey (includes black replacement strap), one size fits all
Gadcet
Fitbit Charge 3 NFC Special Edition Advanced Fitness Tracker with Heart Rate, Swim Tracking & 7 Day Battery - Rose-Gold/Lavender, One Size