"btMv" is an app for reporting abuses of personal transportation in the city of Berlin/Germany. The Berlin Taxi Union e.V. along with authorities and lawyers is taking legal action against malicious behaviour in cabs, Uber and private vehicles, involved in personal transportation and unlawful behaviour. The app is publicly available and requires a valid account on our site https://berliner-taxi-vereinigung.de to be able to send abuse reports to our server. The app requires user permissions for accessing camera and geo coordinates. Legal information using the app is available at https://berliner-taxi-vereinigung.de/btv-gdpr. Please do not hesitate to contact us at [email protected] for any queries.