Hello,
I have SkySafari Pro ver 7.1.8.0 on Android.
When I am browsing around in Perseus I do NOT see NGC 1491. But if I search for it, then it is displayed.
The description says it is a "Bright Nebula" and I have "Bright Nebulae" checked in the Deep Sky>Object Type Selection setting.
Thanks for correcting this problem,
Lamar