How to setup autofill saved credentials on my iOS device

From you iOS device:

1. Open settings
2. Scroll down and select "Passwords"
3. Click "AutoFill Passwords"
4. Select "KryptPass-Mobile"

When you arrive at the login form of a website/app:

1. Select the username/email field
2. Above the keyboard you'll see a preview of the credential for that app/site - click either that credential or the key icon to select a different saved credential