If you constantly find yourself running out of storage space on your iPhone and checking how much memory a particular app is using, then you are going to love the new FAppSize tweak from Cydia. This handy 3D Touch tweak for iPhone allows users to quickly check the file size of any app right from the homescreen. To find the app size all you have to do is force tap on the app’s icon. If you have a non-6s device, then you can also make this hack work with tweaks like RevealMenu that artificially add 3D Touch like functionality to non-3D Touch devices.
With FAppSize 3D Touch shortcut menu for app size is added to all apps. From Settings you can configure FAppSize to display install size or include files created within the application. FAppSize tweak is available in Cydia for free. It requires iOS 9 to work.