I've noticed the other day when using the mobile app, the spoiler said "Click to show spoiler"
*Sorry that it's not a freehand circle
Right now, this doesn't make the most sense as you really "tap" on the spoiler to reveal it. What I'm proposing is to change this to "Tap to show spoiler". This would make most sense as I can't imagine any scenario where you would be using a mouse with your phone.