I was using the Prisma app (like half of the world probably) and noticed the info bubble when you swipe with your fingers to adjust the strength of the effect.
This is my implementation (written in Swift) of this component, which comes with the Prisma look out of the box.
The component works with Storyboards, or you can create a bubble in code and get up’n running with 3 lines of code.
It’s also possible to alter the appearance of the bubble yourself by using a configuration struct.
For more info, just check the documentation!
The component is also available via CocoaPods.