what is the best tool for making video for a mobile app?

Recommend looking into a cast or screen mirroring app. ChromeCast does this along with others. Then you could use Loom for free to record your screen which is mirroring your screen. LOL

use Kinemaster - it's for smartphones only BUT it allows A Roll and B Roll layering which you will need and thank me for... free too

ahah nice hack Eric :) I choose rotato.xyz not that expensive finally $50. It does the screen recording very well ! I bought a music for $10 on storyblocks.com And I am doing the video editing on Adobe premiere. It's my 1st attempt, I'll share the result. For sure it will cost me a lot of hours. @eharris04 do you have the result of your video ? I am curious :)