Thanks for reaching out to us and for your interest.
Unfortunately ABP app for Safari works only on iPhone 5s and newer devices with iOS 9 and 64 bit memory.
This excludes the iPhone 4s, 5, and 5c; the iPad 2, 3rd-generation iPad, and 4th-generation iPad; 1st-generation iPad mini; and the 5th-generation iPod touch. All later devices work.
We would love to help you with that, but that is set by Apple.
Let us know if there is anything else we could help you with.
All the best,