How to choose the screen resolution for your project?

Questions
1

Defolfd can “deployment to six target platforms from the same code in one click”.

However, all platforms have probably different screensizes.
How do you deal with that during development? What is best practice?
Pick just one that has an average size?
Or target first one platform, come back, change the settings and do some work, deliver, etc.

2

The one thing that can really affect the look, is the different aspect ratios. That is when you can start to get weird scaling. Other than that, I guess it’s sort of finding a good middleground. But generally I think it’s better to scale down, than up. Have you read about layouts imnthe documentation?