I use Gboard because of it's customizability. I like adding words to the dictionary to make it easier to type usernames. Gboard lets you pin things so you can save for more than one hour. Never copy OTPs, always type them manually.

Nintype, although technically it’s the half baked community revival “Keyboard 71”

It has a lot of minor issues but it’s the only keyboard that does simultaneous two finger swiping. the learning dictionary is really good too. i can consistently type around 100wpm accurately with it.

any app is prob fine as long as you turn its internet access off. they literally have access to everything you type.

I laugh that the app from my bank throws an error saying all third-party keyboards are malware & unsafe.

I use AnySoftKeyboard still since it has a ton of keyboards & features (tho autocorrect needs improvements).

I use futo board. I like that it had the ability to process speech to text locally. I personally also disable the clipboard

I use futo keyboard because it's got great voice and swipe typing.

since I do copy OTP's

OTPs*

Heliboard I believe, installed the google swiping .so, I believe you can set it to ignore saving inputs or forget them after a time. I like the customization options, I can have solarized dark everywhere including my phone.

At the moment I don't use any keyboard app. I haven't found any that I really like. I used to use gboard which was nice before I became privacy concious and realised gboard could be tracking every key press I make.

If I am going to use a keyboard app I wouldn't use anything unless it is FOSS software.