The "親子のきずな" app allows for seamless integration between a Bluetooth-enabled smartphone and the kids' mobile phone F-03J. This enables easy tracking if the child wanders off, notifications on their return home even when apart, and enhanced monitoring features.

One of the key features includes the "Watchful Alert," which notifies both the parent's smartphone and the kids' mobile phone when the child moves out of the monitoring range (Bluetooth connection range), providing peace of mind in case of separation.

Moreover, the app offers the "Welcome Home Notification," informing parents on their child's return home even when they are away for work or errands. It allows flexible settings based on the child's lifestyle, such as school commutes, extracurricular activities, and friends' visits.