If you have a laptop and has a wifi inbuilt then it would be a great app for you to convert your pc into a wifi router this app is just 1 mb which is quite small it is very usefull to the people who dont have wifi router.
But have a ethernet connection along with laptop you can transfer your net into the mobile and can keep a password so no one messes with your hotspot it is quite simple to install and it is supported by all the devices like android ipad and iphone very good app if you dont want a spend money on wifi router