Question: Is there a tool that enables collaborative development of mobile apps, with role-based access for different contributors?

For team collaboration to build mobile apps with different roles for different team members, Modo App Center is a good all-in-one option. It's got a unified app management interface for collaborative app development with role-based collaboration, real-time analytics and quick deployment with instant updates. The service is designed to help companies spread digital innovation across their organization.

Another top contender is Mendix, a low-code platform for rapid development and deployment of mobile and web apps. Mendix features AI-assisted development, a visual IDE, one-click cloud deployment, governance tools and security. It's also got powerful collaboration tools for team development, making it good for a broad range of roles and industries.

If you're looking for a tool to add high-performance collaboration to your products, Liveblocks is worth a look. It's got features like presence, broadcast, comments, sharing and permissions that let you build a unified, real-time collaboration experience. It's deeply integrated with popular frontend frameworks and offers a range of pricing tiers.

For a no-code option, Bubble is a good option. It lets people create, design, test and deploy production-ready apps without writing code, using AI to generate pages and a drag-and-drop editor. Bubble offers scalable and secure hosting, collaboration tools and a range of pricing tiers, so it's good for startup projects and enterprise-scale apps.