the link shown on the web is not active
You can create an ArcGIS Online organization and account here: http://www.arcgis.com/features/free-trial.html
This will create a free trail account for you to test/play with ArcGIS Online for 60 days.
Once you have this account set-up, you will be able to download Survey123 Connect and you can use it to work with your ArcGIS Online organization.
Hope this helps,
You should be able to download Survey123 Connect from here: Survey123 for ArcGIS | ArcGIS
It requires that you login with your ArcGIS Online organization account.
How do I get the organizational account?. I logged on with the account that
I have still it is not active and hence I can not download. Thank you very
Retrieving data ...