Since Haculo.us was shutdown and Installous is gone, vShare is one of the only viable alternative. Here is a tutorial on how to install vShare on iOS 7.
You will need a jailbroken device (cydia should be installed) and of course, an active internet connection.
Step 1: Get AppSync (In cydia, go to Manage – Sources – Edit and then tap Add. Type repo.appvv.com and add source.
Step 2: Search for AppSync 7.0 in Cydia and install it.
Step 3: Search for vShare in Cydia and install it.
That`s all! You are now ready to download apps from iTunes for free.
Please note that we don’t recommend you using Installous, vShare or any other Installous alternative in order to install .IPA files. We don’t encourage app piracy, because we know that all the developers put effort in creating apps and expect getting money from this.