Thanks for your feedback.
Can you provide more details.
1. What is Nexus 4 Android version?
2. Please check if your ZD is reachable but in any case even if ZD is not reachable you should get error message not force close. If you are getting error message, it will help us analyse the problem if you can tell us what it is.
Thanks once again for trying out ZDRemote and I will be more than happy to help resolve issue.
The ZD5000 is available via a web browser from the mobile device. And the Nexus 4 is running 4.4.4. Just to clarify, I have tested with two different phones running slightly different versions of Android and both force close when attempting to login.