I’m working on an Odoo project where the client needs a mobile app to manage sales, inventory, and customer data on the go. While Odoo offers a default mobile interface, we’re exploring a custom Odoo mobile app that can provide better performance and offline capabilities.

Has anyone here used an Odoo mobile app builder or developed a native app (Flutter/PWA) that integrates with Odoo’s backend via JSON-RPC or XML-RPC? I’m particularly curious about syncing real-time data, handling push notifications, and ensuring secure token-based auth.

Would love to hear what stacks or frameworks you've used and any pitfalls to avoid during development.
Thanks!