Here's a big twitter thread about why you shouldn't use PortPass:
https://twitter.com/user/status/1442198861859090433
Most concerning in terms of security:
https://twitter.com/user/status/1442198902988435467
Edit: Looks like the guy running it has deleted his Twitter after being called out for all the numerous red flags and security issues. Apparently he has a history of scammy endeavours.
"reviewed by our AI", "Blockchain Secured" all BS claims and the app has a collection of fake 5 star reviews.