Another Ionic app is not launched using deep link

Hi , 

I have two ionic app , say App A and App B , I want to open App B from App A using deep link. 

For testing , I simply created html page and used anchor tag there and then I open that html page in browser on my mobile . When I clicked on the link it does open the App B . 

I copied the same anchor tag and put it into App A but it is not working. Please please help me out. 