This app was mentioned in 1 comment, with an average of 1.00 upvote
Apparently this is a thing: https://play.google.com/store/apps/details?id=com.essency.gunsonics
I doubt the earbuds offer a safe NRR.
I run the Westone DefendEar Digital 2s. If you're not interested in full custom, and associated price. You can look at the Westone DefendEar Digital Shooter.