Is keystroke lock recommended for iPad or iPhone?

It would seem much easier to use the built-in Apple on-screen keyboard, and to not use third-party apps with keyboards, and to use the existing insecure-connection browser warnings for any websites somehow still not using network connection security that browsers have all required for some years, and to use the end-to-end connection security provided by iMessage and such.

All of that is built-in, and the default.

Based on a quick review of one of the third-party apps, I’m unclear what the app might be offering, past providing a third-party keyboard with a lock icon shown, and what the Apple iPhone and iPad already provide.

As for the “Apple” point of view, this is a user-to-user forum, while the folks that work for Apple may or may not read postings around here, and only seldom reply.

It's recommended by the people who sell the apps! It's pointless on an iphone or ipad.