Over time, they reportedly used it to determine which Uber drivers drove for Lyft, as well, offering them hefty bonuses and sending them more rider pings to entice them to drive exclusively for Uber. While the company denied that it tracked "dual appers" and that it sent dual-apping drivers more riders, it didn't confirm or deny the project's existence.

The lawsuit accuses Uber of engaging in unfair competition and invading Lyft drivers' privacy, violating the California Invasion of Privacy Act and Federal Wiretap Act in the process. Part of the court document obtained by The Verge reads:

"Plaintiff and the Class seek injunctive relief and damages caused by Defendants' unlawful invasion of privacy and interception of electronic communications and images in violation of the Federal Wiretap Act as amended by the Electronic Communications Privacy Act (hereinafter referred to as the "Wiretap Act" or the "Electronic Communications Privacy Act"), the California Invasion of Privacy Act ("CIPA"), and common law damages for invasion of privacy."

The plaintiff is now seeking $5 million in damages.