This app was mentioned in 5 comments, with an average of 1.20 upvotes
This app can prevent you from double-texting.
Try these apps and see if they do what you want.
Link me: textstats, textalyzer, texty time
Texty Time: https://play.google.com/store/apps/details?id=com.aheadstudios.talkalytics
I actually wrote an app to prevent this https://play.google.com/store/apps/details?id=com.aheadstudios.talkalytics
You could try an app I made just for this purpose: Texty Time
Edit: Nvm, I saw that you said you were on iOS.