Hi Hannah,
The size of your app is quite big and because of that, yesterday we had a problem in restoring your app from its backup, but just now we finally restore it and I installed it on Android 4.4.2 as well.
May I ask you to tell us the exact steps in reproducing the issue, since we need to understand the exact problem.
Thanks for your patience.
1 - Click the grey button in the top left corner to open the side panel
2 - Click "Sign In" enter user name & password - hannah
3 - Click "Customers"
All of the customers specific for this user will show in a collapsible set.
If you click the actual number, it is set up to save the number to local storage and then dial the number
If you click the phone icon to the left, it is set up to dial a predefined number
When I test the app in the browser a pop up comes up saying that I need an application to launch, and I don't have a phone program set up on my computer and then when I text it on my phone though the Appery Tester nothing happens. I have tried to set the JS to the local storage value and then also to a pre-defined number and nothing happens on either. Screen shots of my events/codes are above.
Thanks for telling us the exact steps. It really helped us to understand the problem furthermore. I want to tell you that while testing in browser, the error shows up as you said (You can see the image below). But when I tested it on the device, for calling section nothing works, but for email section, it runs the email program on the device (Email and Gmail to be specific). So, Hannah, we are looking for a solution to this problem and get back to you as soon as possible. 
Okay great thank you!
Also, for privacy issues, would you mind removing the image above, since it contains customer information? Thanks!
Hi Hannah,
We have deleted this answer.
Regards.
Hello,
Instead of
prewindow.location.href = "tel:" + localStorage.getItem("Phone");/pre
please use
prewindow.open("tel:" + localStorage.getItem("Phone"), '_system');/pre
Yes! That works! 
This will also be the same JS for Iphone's right?
Hannah,
Yes, it will.