Hammertrack is built as a Progressive Web App... that means that it'll behave like a native app (an app that you download from an app store), but you can get it directly here without going to an app store. 
Click/tap the Try Hammertrack button below, and then select "Sign Up" to get started.
After you are logged in, if you want to add employees as users, it's easy--just go to the Company Settings page using the menu in the upper right corner of your screen.
We hope you'll love Hammertrack!