On September 30, 2020, Apple finishes the review of version 13.7.1 of PDF Notes S & PDF Notes C and they became Ready for Sale.
On September 29, 2020, I uploaded version 13.7.1 of PDF Notes S & PDF Notes C to App Store
PDF Notes S https://itunes.apple.com/app/id961336139
PDF Notes C https://itunes.apple.com/app/id1459073729
This version fixed bugs.