I adopted Sharp3d perhaps 2 years ago, downloaded it on holiday in Lanzerote (as it happens) to keep the mind busy. HAven’t looked back since.
That was on the iPad Air 4th Generation 11”. I also have in on an iMac, but it’s on the iPad that it shines for me.
Last week upgraded to the iPad Pro 13” M5. Man it is sweeeeeet! Highly recommend!
I’m on a new M5 MacBook Air and Shapr3D was super performant in the beginning, but at least with the model I’m working on, it has slowed to virtually unusable levels when creating sketches (spinning and viewing the model is still very smooth). I describe my issue here: https://discourse.shapr3d.com/t/max-features-in-history/41160
I don’t know whether this issue is project-specific, if Shapr3D generally struggles with larger history models, or if this is a Mac-specific issue. I need to try testing on a Windows PC to see if things are any better.
The M5 is suppose to eat this stuff up. Low power mode?
Shapr3D couldn’t render the rat rig vcore 4 on my iPad Air. But did on my iMac i5. Haven’t tried it on the M5 iPad yet. Happy to see how it performs on this iPad M5 if you want to send me the file.
Mostly on my PC, but also on the ipad pro M4, especially when the weather is nice outside. 
Also have it installed on my Macbook Air M1, but I’d say that’s for rather light work only.
Home built Ryzen 7 PC running with a very lean and tuned install Win 11.
Nice how does it perform?
My son has an i9 with 5080 RTX I ought to try in on there to compare.
I’m still running a 2080 Ti. Honestly, no complaints on that front, it’s not that far behind current GPUs when no fancy stuff like raytracing is needed.
I think my i9-9900K is more of a bottleneck. 