Can I pause, or slow down, the painting animation?

The painting animation in Waterlogue cannot be paused, but you can create a recording of your screen while Waterlogue is painting. This video is saved to Apple’s Photos app, where you can then step through it frame-by-frame, send it to your computer, etc.

Apple provides simple instructions for setting up full screen recording on your iOS device: https://support.apple.com/en-us/HT207935