Wider Selfie and Vlog Camera
By attaching the SANDMARC Wide Lens, you get a 2X wider shot on the front facing camera. While the iPhone 11's selfie camera is a much improved 12mp, it doesn't have an ultra wide lens mode. The selfie camera frame is still very close to the face, preventing you from capturing a lot of the background. This can be a problem for vloggers, and solo explorers who want to capture themselves and their environment.
With the SANDMARC Wide Lens holding the phone at a regular arm's length, you can comfortably fit three people into the shot. Without it you can only really fit yourself, and a tiny bit of background.