The New VX4 arrives in Eco mode, which has a top speed of 15 miles per hour. That’ll get you where you’re going, but it’s not going to give you goose bumps. Curiously, Sport mode also tops out at 15 miles per hour, but it gets you there fast. The torque is so powerful in sport mode that it took most of my first ride to learn to brace myself against the rapid acceleration. In addition to the speed modes, you can also control the start settings (roll or throttle), top speeds, password settings, and more on the app, which is a common feature in electric scooters. What’s more impressive is that the app isn’t absolutely necessary, since you can access all of those controls through the bright, clear, TFT display. Photograph: Billy Brown At first, I was annoyed that I couldn't mount my phone on the handlebars. But once I realized that you can access every feature and adjustment on the display, I appreciated the ability to put my phone away and just enjoy the ride.…