How can I install the Dropbox app on an iPhone 3GS running iOS 6.1.6? THe newest version of the app is iOS7-only.
I've heard that if the app has been installed under your account, the App Store will let you use the last compatible version, but I have no devices running iOS7 to add it to my account with.
How can I get the Dropbox app onto this phone? The iPhone is jailbroken.