
Expo Application Services
6.2#14 in mobile app development platformsFrom $19 a monthFree planWeb
Visit

EAS suits teams building and deploying Android and iOS apps that want cloud-based build services, signing management, and store submission. Its Free plan may suit teams with modest build and workflow needs.
MIT App Inventor suits beginners and learners who want to create mobile apps with blocks rather than conventional coding. It also fits educators and project-based learning, with tools for sharing and remixing projects.