After Working on it alone for a year, the founder and original developer of Nova Launcher Kevin Barry has stopped working on Nova Launcher and the open sourcing efforts. More Info: https://teslacoilapps.com/nova/solong.html
"Private" from other people who may have access to your phone, but not private from Google. I use it to segment my work and personal stuff, and can still get notifications for both accounts, where as separate users wouldn't get that.