On the left side of the Whistle web app is the primary navigation bar. For typical participants they will see up to four items depending on what you want to include as the program admin.  Some companies only want to include the wallet for example.  Other companies want only the Activity and Program tabs.  You can customize the participant view to what best fits your needs.

Below the first four participant are the admin tabs.  They are only visible to people with admin permission on Whistle.