Since the ACjr lacks a network interface and embedded web server, the short answer is "no". But there is a way if you are willing to take a roundabout approach. There is a free software package for Windows and Linux called ACserial2web. It requires a computer to be directly connected to the Jr via serial cable, and, to be if any real use, to be left turned on 7/24. The software emulates the web server in an AC3; any app compatible with the AC3 will work with it.
In all honesty though, you'd be better off upgrading to an Apex, Apex Lite, or the recently-announced Apex Jr.