I would like to know if my target audience for my app will be majority mobile/tablet users, should I be building my app from the Mobile Preset setting?
I am currently trying to build it from the centered setting and then with the responsive feature but thats not working out to well for me as everything starts to compress together.
I would just put it in the custom setting, as tablets are much wider than 380px. Some phones too actually.
I always just develop my sites in custom, usually like 1200px wide for desktop sites but sometimes more. That way it looks good on desktop and I can make it look good on mobile.