Fish Eye:
Of course you can create this effect retrospectively with an app, but in my opinion, the picture looks better quality when it was shot directly to the lens.
WW:
The WW-effect exists, but could be a bit bigger.
Macro:
This lens has impressed me the most. I have long been annoyed about the fact that you can not make macro shots with smartphone. Ladybug, ant, plant, etc. can now be incorporated very beautifully photographed with a smartphone.
Conclusion:
Size, material, appearance and function at this price unbeatable. I have no comparisons. But I am very satisfied with this.