Does Android Dream of Excessive Sheets? There are varying prices for SkySafari and its variants. Celestron SkyPortal is freeware. SkySafari is distributed by Simulation Curriculum Corp, who also release Starry Night 7. I've run Celestron SkyPortal for a couple of years on an Android tablet (Asus Nexus 7) and I find it quite invaluable. I've recently discovered it runs well on my Asus ChromeBook. It apparently utilises the SkySafari rendering engine. Has anyone ran Celestron SkyPortal and SkySafari on Android/Chrome OS and if so is there much difference between them?