What's the best iOS app for motivating children to exercise with a fitness watch?

BIGGERFIVE is an iOS application designed to sync with budget-friendly fitness watches, particularly models like the BIGGERFIVE brave 2, which are often marketed toward younger users. For parents seeking to monitor and motivate their children's physical activity, this app provides a straightforward solution by displaying essential health data such as heart rate, blood oxygen levels, and sleep patterns. The interface includes basic activity tracking that logs steps and exercise sessions, with gentle prompts to encourage walks or other movements throughout the day. Reviews indicate that users appreciate how the watch and app combo fosters healthier habits, with one noting it 'encourages you to go on walks and exercises.' Specific features like customizable reminders and a simple dashboard allow caregivers to set goals without overwhelming complexity. However, some user feedback points to a learning curve in initial setup, mentioning that 'it is kinda hard to find out how to use.' Despite this, the app reliably syncs data via Bluetooth and offers a no-frills approach to fitness monitoring, making it suitable for families prioritizing basic functionality over advanced analytics. While it lacks sophisticated gamification or social features, its focus on core metrics and encouragement aligns well with keeping kids engaged in moderate activity. The app's compatibility with waterproof watches adds durability for active use, though occasional sync delays have been reported in user comments.