How do I get Dex on my phone?

Excuse me, could you please elaborate on the process of obtaining Dex on my mobile device? I'm quite intrigued by the platform and would like to have it accessible on my phone for convenience. Is there a specific application that I should download from an app store, or is there a different method that I should follow? Additionally, are there any requirements or steps that I need to take in order to ensure a smooth installation and usage of Dex on my phone? Thank you for your assistance.