Been experimenting with old 2G iPhone (iOS update, jailbreak, etc). Just a quick note: If you ever wanted to know where the downloaded IPA’s are on your phone/pad, check the /private/var/mobile/Installous/Downloads folder. You can use a tool like DiskAid to connect to your device and store them locally.
I am currently doing the other way around.I am in principle against iTunes and avoid as much as I can, so I will try to see if I can install downloaded IPA from Installous. I think it should work.
PS. Coming back from Android to iOS, I realize how good Android is and how restricted iOS is.