BYJU’S Learning App PC Version is downloadable for Windows 10,7,8,xp and Laptop.
If you have windows 10, then just go to Microsoft store and type on search bar BYJU and install.
If you have another os like windows 7 then install bluestack or another third party app as they are android simulator for windows. These will help you install all android apps.
Byju's is an application which is developed to run in android atmosphere. So you cant download it on laptop. Meanwhile, you can download bluestacks on your laptop which then will allow you to run Byju's on youy laptop.
The application you asked for is an android app which is available on the Google Play Store and it cannot be run on windows without installing any emulator.
To download this app on Windows or Mac PC/Laptop, firstly you are required to download an emulator on your PC/Laptop. In that emulator, you will be able to run any android app including your asked app. Some popularly known Android emulators are Nox Player, Bluestacks etc.
I hope this information helps you.
For further doubts feel free to ask in comment section.