I have some experience with vuejs, built some apps in vue even build some couple of Single Page Applications in vuejs. I wanted to try my hands on a mobile application so I wanted to know if I should move on with my vue native or switch to react native.
I would say if you already have experience with Vue and you like Vue then it would make sense to choose it. Build on our existing knowledge. Vue is also much simpler than React but just as powerful imho.
First I doubt any one here actually writes mobile apps. They are downloaded and completely run on the device only.
An example of a mobile app is an anitvirus program for mobile.
As far as a web mobile app, over time why not learn both Vue and React.
The reason I say that is if you are still young, and at some point seeking a career at a large company, they may use react instead of vue. But look at Flutter also as suggested.