Best method to setup a tablet in KIOSK mode where it can only use Internet Browser to 1 website.

Hello Experts,
We need a tablet that will only do one thing.  Use the internet browser... and will only browse to one site.
This will mainly be for providing information to those near the device, but want the ability to ask the user a multiple choice question also.

In a perfect world, each time the unit powered on, it would open up the browser and would go automatically to a pre-determined site (And would not be able to go to any other site)

Is it possible to force ANDROID or IPAD to start the browser as soon as it's turned on?  Based on what I've read on EE, it is possible on a windows machine... but assuming that a decent Windows Tablet is going to be a substancially higher price than say an ANDROID tablet.   Having it work on a cheaper unit would be preferable.

Plus with Windows 10 seems like the OS is going to be a lot more.... "overhead" (for lack of a better word) than is needed.   This website will literally be the ONLY thing this device will ever do.