My ride-hailing system is built in Flutter for both Android and iOS, with push notifications already wired in, yet three key pieces still need attention before launch. First, ride-event push notifications have stopped flowing between the passenger app, driver app and the web-based admin panel. When someone requests, cancels, or is marked as “arrived”, nothing updates in real time. I need the notification flow repaired, verified end-to-end and any server-side tweaks (FCM topics, tokens, sockets, etc.) completed so each role sees live status instantly. Second, the “extra charges” selector in the passenger app no longer feeds the correct price to the fare calculation. The chosen add-ons should update the total immediately and surface the final amount to both the driver app and the admin panel. Please trace the fare logic, fix the calculation, and ensure the values persist to the database. Finally, once everything is stable, I want the production builds delivered and published on Google Play and the App Store under my developer accounts, complete with signing, screenshots and store listings. Deliverables • Working push notifications for request, arrival and cancel events, visible in both apps and the admin panel in real time. • Accurate extra-charge fare calculation reflected across all three interfaces. • Approved releases live on Play Store and App Store, with full source and build instructions. If you have solid Flutter, Firebase/FCM (or equivalent) and store-submission experience, this should be straightforward. I’ll provide source code, server access and developer-account credentials once we start.