Telescope lens for smartphones

I bought something that looks identical to this: https://www.amazon.com/FidgetFidget-Telescope-Telephoto-Universal-Cellphone/dp/B07HZ2H556/ but it was sold under a different name two years ago. Anyway, I was quite pleased with it. The 20x zoom was very helpful for getting birds in view then getting a nice close picture of them, and focusing is easy. It is sturdy, and has held up well. I took some great pictures with it and it fits in my pocket. If you can spend hundreds of dollars you can certainly get better optics, but this will be much better than a plain old cell phone camera. The only reason I don’t still use it is I now have a camera with a 40x zoom.