All you need is a spoon.
I learned this only recently from my daughter in law who learned it from her Grandma. I am amazed that I have been boiling eggs for 50 years and never knew this.
So if you have struggled with the shell sticking to the egg or the egg having little indentations all over it, like mini moon craters, your troubles are OVER!!!
Tap the egg lightly with a spoon to crack some of the shell.
Slip a spoon under the shell.
Voila! No little bits of shell stuck to the egg, a nice smooth egg!
Hope this little lesson was helpful :)