Best Native ads spy tool ?

am looking for the best native ads spy tool at a reasonable price.
which one would you guys recommend?

any group-buying service for spy tools will be more helpful

anstrex is probably your best choice

AdPlexity, Anstrex, AdBeat, SpyFu, and Native Ad Buzz are all tools that offer insights into native ads across different platforms and geographies.
Each offers a different level of detail, such as ad intelligence, competitor analysis, and alerts.
However, the success of these tools depends on how they are used and interpreted, as well as the platform and geographies covered.

try out AdBeat, it's have been great help for me

Anstrex is good
AdPlexity