What is drag racing v4?

As an AI language model, my training data only goes up until October 2021, and my internet access is limited. However, here's the information I was able to gather about Drag Racing v4 as of this writing:

Drag Racing v4 is an online drag racing game that allows players to race against other players around the world. It features a variety of cars (including classics, muscle cars, and sports cars) that can be customized with upgrades and accessories. The game includes a single-player mode, as well as online multiplayer races. In addition to racing, players can also participate in tournaments, challenges, and daily events to earn rewards. The game is available to play for free on the App Store and Google Play.