Best way to make app?

When choosing to make an app. Do I go with "2D Core" or "2d Mobile Core"? Differences? Should I use something else? Also in the future after I design the app I want to merge it with some software I want to design. Should I design the app around the software or software around the app? Please explain the difference since I'm fairly new. I do want to become professional.

 

Make your game for Mobile, more people are on Android than IOS though.

 

If you are not already a programmer then choosing a future target isn't really relevant. Select a platform that you can use and easily test on. Choose an app that you would be happy using. It doesn't have to be a game if you are learning. And frankly I have no idea what design the app or the software means But basically you "architect" an app and if done correctly you can write that in any of a number of languages and target any number of platforms.

 

Whatever you choose can be changed later. For beginners, however, it is worth considering adding WebGL by default (https://docs.unity3d.com/Manual/webgl-building.html), you will quickly publish your project for others in the browser (https://play.unity.com/).