> AltStore is an iOS application that allows you to sideload other apps (.ipa files) onto your iOS device with just your Apple ID. AltStore re-signs apps with your personal development certificate and sends them to a desktop app, AltServer, which installs the re-signed apps back to your device using iTunes WiFi sync. To prevent apps from expiring, AltStore will also periodically refresh your apps in the background when on the same WiFi as AltServer.