There´s no iOS Version for SunSDR Transceivers.
It works on MacOS (up to Monterey) good but has a bit high CPU load with Ver. 2.
Latency is very good between Mac and Sun. Flexradio is up to 500ms latency, unbelievable that the US guys have so much fun with this piece of crap...
I had only problems with my Flex 6400 before, Firmware bugs, high latency, you have to buy the "good" german Software for the Mac or from Don (dogpark).
I compared both side by side and the SunSDR2DX is so much better, i sold the Flex very quick.