Are there any visual app builder platforms that support responsive web apps and database connectors?

Yes — several visual app builder platforms support responsive web apps and database connectors. Here are some good options:

1. Bubble

• Responsive web apps: Yes
• Database connectors: Yes, built-in database plus API connectors and plugins for external databases
• Best for: No-code SaaS apps, internal tools, marketplaces

2. Retool

• Responsive web apps: Yes
• Database connectors: Yes, very strong support for SQL databases, REST APIs, GraphQL, and more
• Best for: Internal tools, admin panels, operations apps

3. FlutterFlow

• Responsive web apps: Yes
• Database connectors: Yes, integrates with Firebase, Supabase, REST APIs, and custom backends
• Best for: Mobile-first apps that also need web deployment

4. Appsmith

• Responsive web apps: Yes
• Database connectors: Yes, connects to PostgreSQL, MySQL, MongoDB, REST, GraphQL, and others
• Best for: Open-source internal tools and dashboards

5. OutSystems

• Responsive web apps: Yes
• Database connectors: Yes, enterprise-grade integrations with SQL and external systems
• Best for: Large organizations, enterprise workflows

6. Mendix

• Responsive web apps: Yes
• Database connectors: Yes, supports many enterprise data sources and integrations
• Best for: Enterprise low-code development

7. Adalo

• Responsive web apps: Limited compared to the others, but supports web apps
• Database connectors: Some integrations via external APIs and collections
• Best for: Simpler mobile/web apps

8. Softr

• Responsive web apps: Yes
• Database connectors: Yes, especially Airtable, Google Sheets, and some external sources
• Best for: Portals, client-facing apps, simple CRUD apps

Quick recommendation

• Best no-code general-purpose: Bubble
• Best for internal tools: Retool or Appsmith
• Best for mobile + web with modern UI: FlutterFlow
• Best enterprise platforms: OutSystems or Mendix

If you want, I can also give you a comparison table by pricing, ease of use, and database support.