How to Know if a Plugin can be used with my Theme [closed]

So in theory WordPress extensions are all using its APIs to peacefully and happily coexist.

In practice the landscape of WordPress extensions is a brutal mess, with literally tens of thousands of them, produced by developers of drastically different qualification.

The two basic practices to mitigate and save your sanity:

  1. If you are in a planning stages and plan to use paid products, inquire with their developers for possible issues. It’s pretty valid pre–sale question, and for popular things they should typically be aware if anything is a problematic combination.

  2. Have a separate copy of site for testing. Typical practice among developers is to have a local site, more involved projects tend to also have dedicated staging servers. Even for relatively basic/personal site nothing should really be going into production right away, without being tried out in testing.