How to allow only specific users to check-in to a session?

Go to Program builder and click on the session which you want to be accessible for check-ins to users with custom role only, set the option “Who can check-in to this session” to custom roles and choose the custom role you just created. Click on Save. See screenshot below.

Now, simply assign this newly created custom role to users to whom you want to allow to be able to check-in to this session.

How can I create more than one administrator to manage my event platform?

Here’re the steps to create additional admins:

Go to Contacts.

Click on Add New button.

Choose administrator from the Usertype on the left sidebar.

Enter the required fields.

Click on Save button in the top right corner.

On the left sidebar, enable Admin Staff role under the Roles.

Click on Save button.

To send credentials to the new admin, click on Send Welcome Mail button to send the email with login details. Admin has to use these credentials to log in to the dashboard and manage the platform. 

Dashboard can be accessed from here: https://dryfta.com/log-in-to-your-dashboard/

How to display download app URL to attendees?

To display the download link to the website visitors, enable the mobile app widget by going to Website builder > Homepage widgets. This will display the download app link to play store and app store on the homepage of your event website.

You can also use the direct Download URLs to App Store and Play Stores. To view the direct download URLs, go to Event App Settings in your event platform in the sidebar.

How an attendee can use vCards & Meetings?

vCards
are contact details of each delegate. So, if a delegate wants to know
more about another delegate, he would send a vCard request. When another
delegate accepts the vCard requests, the requestee will be able to see
the contact details of the other delegate.

Meetings are
requests sent by one delegate to another delegate to setup a meeting
with him/her. Once a meeting request is sent, the another delegate, if
interested, would contact the delegate who requested the meeting.