Square root is a complicated topic for every kid
This app help your kid to learn how to do it in 5 levels
Each level has animations and help

In level 1 the app shows only perfect square roots like √9 just to introduce your kid to understand what square root is, this level shows help like ?x?=9 to help to understand the concept

In levels 2 - 5 there is help as you can see on the images

level 2 shows 1 digit numbers like 7.0
level 3 shows 2 digit numbers like 35.00
level 4 shows 1 digit with 2 decimals like 5.45
level 5 shows 2 digits with 2 decimals like 56.78

the process in each case is similar but each case has it's own procedure too