Some particularly click-intensive actions should be avoided. One of the first things that I tried out was Mort Myre Fungus that is OSRS gold blooming for one hour. At my normal spot, on PC, I can normally generate 2600-2800 fungus per run. But involving having to tap-hold through Ghasts and Snails, using runescape cut a nearby tree once I actually tapped on the bloomed log near, and using runescape select items on the ground when tapping neighboring (and therefore opening the Area Loot port ), I just managed 1800 in the 1 run I did on Mobile. That's a significant drop-off in efficiency.
There are a number of items to notice: Mobile needs to work on recognizing tap, tap-hold, and swipe gestures somewhat better. Oftentimes while performing clue scrolls, I'd tap-hold my group of Fortune to teleport into the GE and don't pop up - and the moment I released the hold, the thing unequipped like I had only tapped it. Other times, I'd swipe (to drag an item or rotate the camera) only to have runescape act as if I had tapped the place the swipe started. In addition, in particularly taxing areas/situations (like battling Double Agents and Saradomin Mages, or if I am up on the very top of White Wolf Mountain), tapping objects to swap or equip things doesn't always register.
It functions, although I'll admit, it doesn't work as well as PC. You can, less or more, do pretty much anything you can do on PC, although I Buy Rs gold would not recommend high-intensity activities. Don't bother setting FPS over 30, you likely won't get 30 FPS all the time.