This app was mentioned in 7 comments, with an average of 1.57 upvotes
For a better user experience, I use the webpage Fast by Netflix or the app Meteor
Both are free with no ads
https://play.google.com/store/apps/details?id=meteor.test.and.grade.internet.connection.speed
Best one I've found will even tell you app specific performance
Alternatively if you want something simple been using this for years
https://play.google.com/store/apps/details?id=org.zwanoo.android.speedtest
Pretty much any should work, just annoying with how much ads and crap come with some. I'm mostly using Meteor: https://play.google.com/store/apps/details?id=meteor.test.and.grade.internet.connection.speed
I use Meteor