Link to Other Apps
You can link to other apps using the app's deep link url like this:
<a href="zoomus://" target="_system">Open Zoom</a>
You must use a system target to open the device browser, and then your device will take care of the rest.
To find an app's deep link url, you should look through their documentation, or contact them.
Open a link using the system's browser
The same _system link target can also send any link from the app to the device's default browser. This can be helpful for things like PDFs or other files where you want to give the user the freedom to interact with the file however they want.
<a href="https://mysite.com/document.pdf" target="_system">Open PDF</a>