For full-screen mode, install the iOS Snowbunny web browser (swipe in the address bar) or the Android Fullscreen web browser. The default preset is intended for iPad with a bluetooth keyboard, but you can change the appearance of the application.
This basic Linux can be used to practice programming in C, bash, support for awk and sed, create a pseudo-network (because this version of the emulator does not allow Linux to connect to the Internet), and learn the basic Linux commands thanks to the Busybox software. In the video bellow, I present the capabilities of the emulator in conjunction with iPad Mini Retina and a bluetooth keyboard:
For offline mode use free inuX application, run ftpd on it, upload JSLinux files to /etc folder with FileZilla, run httpd and open address http://localhost/etc/jslinux-mobile/index.html in Snowbunny browser.