Unfortunately, I have stopped using Sky Safari Pro 6 since it displays a shockingly unstable image on my Samsung Note 9 phone. No other planetarium app on my phone does this. Sky Safari 5 is equally unstable, with the display jittering erratically from left to right, rendering it useless as a night sky observing aid.
I wrote about this a long time ago, but no solution was forthcoming. My phone has Android version 10 software.
How can you explain this instability?