FWIW with iOS 11 re: your 1st point, the Safari/iCloud Keychain password store is available to native apps as well. https://www.cnet.com/how-to/how-to-use-ios-

FWIW with iOS 11 re: your 1st point, the Safari/iCloud Keychain password store is available to native apps as well. https://www.cnet.com/how-to/how-to-use-ios-11s-password-autofill-feature-in-apps/ https://www.cnet.com/how-to/how-to-use-ios-11s-password-auto... I've found it quite useful.