Reactive Phone is a renowned Russian mobile application developer established in 2009. They specialize in creating innovative and user-friendly mobile apps for iPhone, iPad, Android, and Windows devices. With over 18 million downloads, Reactive Phone has gained popularity for their flagship apps, Экзамен ПДД (PDD Exam) and Штрафы ПДД (Traffic Fines).

Экзамен ПДД has become the go-to app for students preparing for the road exam, while Штрафы ПДД facilitates the payment of traffic fines across Russia. Another popular app by Reactive Phone is Smart Driver, which serves as an anti-radar and dashcam tool, alerting drivers about speed cameras, police checkpoints, and other potential hazards. Acknowledged as the number one app for drivers by За рулëм magazine, Reactive Phone's apps have received numerous accolades and positive reviews.

They continue to expand their reach, with their applications available in multiple countries and languages