How to Open Any Public GeoGebra Resource on Your Mobile Device
ADDITIONAL NOTE:
After selecting SEARCH (0:04), if you type in the GeoGebra resource ID (last string of 8 characters you see in the URL of the resource) of the resource you want to access within the text field, you'll be able to get this resource to appear right away.
Otherwise, as shown here, you'll have to type in the title of the resource (or part of its title) and scroll through the list a bit until you find it.