You kinda answered it actually, "I saw in your patreon something about day 4 of Anders and Gil" --What I post in Patreon belongs to Patreon.
Parker, Mark, Gil, Anders' day 4 are Patreon-only for now
Parker's Day 4 will be released in 24 hours, or maybe earlier. The rest are May, June, July, respectively
As for the Android version, an error with the package is likely happening because you tried to install the same version of the game OR you went from higher version to lower version.
The rollback error is probably because you didn't close the game properly in previous session.