Android:

The exact procedure may differ depending on your browser and Android version. If you discover improvements to the following procedure, please let us know!

First open the organice web page in your mobile browser.

On Chrome, tap the "menu" button (three vertically stacked dots) and select "Add to homescreen".

On Firefox, tap the home icon with the plus sign inside it which is immediately to the right of the URL in the address bar.

Other browsers may have a similar procedure to one of these.

At this point, most browsers will present a popup banner with the option to "Add to homescreen" or "Install".

If you want the organice app icon on your home screen to jump to a specific .org file, and/or if you want multiple app icons on the home screen to jump to different files, things can get a bit more tricky. For instance, Chrome only offers "Add to homescreen" the first time; once it has been added, the option changes to "Open organice". Firefox allows creation of multiple home screen icons, but when opening any of these, organice does not jump directly to the specific file which was open when the icon was created.

Therefore if you want multiple organice bookmark icons on your homescreen which jump straight to particular files, you may have better luck using another technique. For example, you can use a third-party program called "Open Link With…". Once that's installed, from Chrome, visit the page in organice you want to make a homescreen icon for, then tap the "menu" button again, select "Share…", and then "Add To Home", then "organice". Once it's added, your home launcher may allow you to change the visible icon to the organice icon, or whatever other icon you choose.