How good are the clip on Macro lense for Iphone for a concert?

I'm going to a concert next week, and i want to get shots up close but our stadium doesn't allow big cameras. What's the best detachable iphone camera for a concert? Suggestions? Need As soon as possible!

Clip-on, phone, concert? Doom!

You really do not understand the meaning of "macro". Macro lenses are designed for use when shooting subjects up close, like less than 10 inches and at image to subject ratios of up to 1:1

What you need is a telephoto add-on lens for your mobile.

You can find them on Amazon.