You have options for quality when exporting a project, from 480p to 4k. I usually stick with 1080p.
You sure? I don’t have any problems with it.
So I have actually lots of experience with mobile editing, and the best software on Android or if you have no budget on iOS is Kinemaster. It offers everything including Green Screen, but it takes some time to get used to.
If you have iOS and a budget I would recommend LumaFusion