Design language

Interesting to see how picky many users seem to be - I see differences in UI, but I simply use the software and don't really care about these minor app aspects. Important is the functionality of an app. If edges are rounded or not, if scrolling has momentum, if ui elements have animations - this is totally unimportant for my perception of an app.
Important for me are facts:
- does the app do for what I got the app
- as password manager, is the app designed with security in mind
- the app is not complicated to understand
- are the most used functions fast and convenient to use

If an app is beautiful, it's nice, but a password manager doesn't need to be beautiful. I don't buy a password manager because it's beautiful or more beautiful than a competitor. I get it, because it's fulfilling its role as password manager better than its competitors.