Install paid apps without jailbreak? yes you can the option is this !
This is an china based software which helps to download latest iPhone apps easily problem is people does not know how to use the software. follow this link to download Kuaiyong. http://tinyurl.com/mosf33y
Now here is tutorial to install software on iPhone
Connect iPhone with USB cable
Open it (Your device now connected with software)
Now find your app and open it
Next window press RED color button (Download button)