Smart watch (Derbyshire Hill WA9)

Ax connected smart watch. A few years old. Worked smading when I first got it but been kicking about in a draw fir a couple of years and now can't get it to connect to the app. May not be anything wrong with the watch may just need resetting o'r something. I'm sure somebody that knows what they're doing can get it sorted. Watch and charger no instructions or box.