Many free or paid mobile app builder provide tutorials, a
community forum and other resources to help users get started. However, if you
need specific advice or support for your app, it might be more cost-effective
to choose a paid option that offers dedicated customer support. For example, a
company like BuildFire has an app strategist on hand to discuss your
requirements with you and recommend the right features.

https://infostans.com/best-mobile-app-builder/

Free vs. Paid Mobile App Builders: Which is the Right Choice for You?