I can definitely tell you that using app builder worth it is quite easy to do and all you need to do in order to use app builder is just go to far site https://flipabit.dev/ . This is where you will be able to find all the secrets of using them and you will also be able to use it easily. Anyway, if you want to create your own app but you don’t have a lot of free time, then I would definitely suggest you to go to that website I installed them earlier and use that app builder.