Is it possible to make an ios / android application that does not allow itself to be closed?

Question

Android

The task is to create an information application on ios or android, which will be downloaded to tablets. These tablets will lie in the hallway of a private clinic. Customers will come and take them. It is necessary that only this application is displayed on the tablet and the client cannot go to the menu and open any other application. How to implement this?

Answer 1

There are several solutions, from simple to complex.
1) Cheap and cheerful - for your application, remove all on-screen controls and redefine `onBackPressed` in the application. Minus - nothing prevents the system from killing the application, the user needs to restart the device, when updating the application from Google Play, it is necessary to launch the application again.
2) Make your application the default launcher. When the device starts, the application will start. Minus - you can remove the application by manipulating the bootloader, or by connecting the device to the PC.
3)Android for business, kiosk mode - https://developer.android.com/work/dpc/dedicated-d.... By manipulating the device, you can limit the functioning of the device, it is quite possible to lock it on one application. Minus - there are certain difficulties with the automatic updating of the application, it is more difficult with development, not mainstream, expensive.
4) Own firmware. Anything can be done. Cons: Expensive and time consuming.