This app was mentioned in 2 comments, with an average of 4.00 upvotes
The Joule app. It's amazing.
Select meat, select doneness, select thickness, done. They even play a little food porn video for you ;)
I would recommend introducing them to the Joule app! Even though it's the controller for an Joule circulator, you don't have to have one to use it.
I love the way it gives you "visual doneness" videos showing what to expect with different temps and calculates cooking times based on thickness and fresh / frozen.