Flutter Development
Cross-platform mobile apps for iOS and Android — field tools, client portals, sales rep apps, and operations software that connects to your existing backend systems.
The problem
Most business software is built for people at desks. But a significant part of real operations happens away from a desk — sales reps visiting customers, field technicians at job sites, delivery drivers on routes, warehouse staff on the floor.
Without mobile tooling, those teams improvise. Orders get taken on paper and re-entered at the end of the day. Attendance is tracked in WhatsApp groups. Delivery confirmations are a phone call. Visit notes live in someone's notebook. The data gap between what's happening in the field and what's visible in your system can be hours — or never.
Managers who need real-time visibility are stuck waiting for end-of-day reports. Clients who want to track their orders have to call your office. Non-desk workers who need task assignments get them via a chat message that may or may not be seen.
A Flutter mobile app connected to the same backend as your web system closes this gap. When a sales rep enters an order on their phone, it appears in the web dashboard immediately. When a driver marks a delivery complete, the client's portal updates automatically. When a manager opens their phone, they see today's numbers — not yesterday's.
The key is that the mobile app isn't a separate system — it's another interface to the same data your business already runs on. One backend, one source of truth, multiple interfaces: web for office staff, mobile for field teams, portal for clients.
Flutter lets us build for iOS and Android simultaneously, which means your field team doesn't need to be on one platform, and you don't pay to build the same app twice.
Deliverables
We build purpose-specific Flutter apps — not generic app templates adapted to fit your workflow. Each app is scoped around the actual tasks your team needs to complete.
Order entry, payment collection, and customer visit logging — all from a phone, even when connectivity is poor.
Attendance check-in, visit tracking with GPS, daily task assignment, and end-of-day reporting for field teams.
Mobile-first portals where clients track their orders, view delivery status, and access account information without calling your office.
Barcode scanning, stock count capture, and warehouse lookup for teams doing physical inventory work on the floor.
Real-time sales summaries, team performance snapshots, and alert feeds for managers who are never sitting at a desk.
Route confirmation, proof-of-delivery capture, and GPS-based delivery tracking for drivers and dispatch teams.
Purpose-built tools for factory workers, technicians, and non-desk employees — replacing WhatsApp threads and paper forms.
Capabilities
One codebase ships to both iOS and Android. No duplicate development — same UI, same logic, same timeline.
Apps store data locally when offline and sync to the backend when connectivity is restored. Critical for field work.
Your mobile app and web system share the same API. Data entered on mobile is immediately visible in your web dashboard.
Order approvals, delivery confirmations, and task assignments pushed directly to the right person's phone.
Camera for photo capture, GPS for location tagging, barcode scanning for stock management — accessed through Flutter plugins.
A field rep, a manager, and an admin see different screens within the same app. One app, multiple user types.
We manage the build, signing, and submission process for both platforms — including updates after initial release.
If your business already runs on a web system or ERP, we build the API layer that bridges mobile to your existing data.
Who this is for
Sales reps take orders and collect payments at customer locations. The Upotto ERP mobile component was built for exactly this workflow — reps don't return to the office to reconcile data.
Production supervisors log output, track worker attendance, and flag equipment issues from the factory floor without walking to a shared terminal.
Drivers confirm route stops, photograph proof of delivery, and update order status in real time — while dispatch tracks them on a map.
Technicians receive job assignments, log visit notes, capture photos, and close tickets from a client site. No paper, no end-of-day re-entry.
Area managers visit stores and get real-time sales dashboards, stock alerts, and staff performance data — without calling head office.
If a significant portion of your team does work that happens away from a computer, they likely need purpose-built mobile tooling — not a spreadsheet on a phone.
Technology choice
Building separate native apps for iOS (Swift) and Android (Kotlin) means two codebases, two development tracks, two sets of bugs to fix, and two timelines to manage. For most businesses that aren't consumer app companies, that overhead isn't worth it.
Flutter solves this with a single Dart codebase that compiles to native binaries for both platforms. You get genuine native performance — not a web view wrapper — because Flutter's rendering engine draws every pixel itself, independent of the platform's native UI components.
Dart's strong type system means errors surface at compile time rather than in production. For business apps handling real financial or operational data, that matters.
Flutter's widget system gives precise control over animations and transitions — apps feel polished rather than sluggish, which matters when field workers are using them dozens of times per day.
Because Flutter apps consume standard REST APIs, the mobile app and the web system can share the exact same backend. A sale recorded on mobile appears in the web dashboard in real time. There's no separate mobile database to sync or maintain.
For most B2B use cases, Flutter gets you to market faster than two native apps and costs less to maintain long term. It's the right default for business software that needs to run on both platforms without a massive build budget.
Stack
Flutter
UI framework — cross-platform iOS & Android
Dart
Strongly typed, compiled language behind Flutter
NestJS
Backend API layer — REST endpoints for mobile
Node.js
Runtime for backend services
PostgreSQL
Primary relational database
REST APIs
Shared API contract between web and mobile
Firebase
Optional — push notifications, auth, analytics
Docker / Linux
Deployment infrastructure for backend APIs
How We Work
A structured approach that keeps projects on track without unnecessary ceremony.
We learn how your business operates, what the current pain points are, and what success looks like. No assumptions.
Define the technical scope, system architecture, data model, and integration touchpoints before writing a line of code.
Design interfaces that your actual users — operators, managers, field staff — can navigate without training.
Iterative builds with regular check-ins. You see working software early, not just status reports.
Functional, integration, and edge-case testing. We fix issues before they reach your users.
Production deployment with proper environment configuration, data migration support, and go-live assistance.
Post-launch monitoring, bug fixing, and feature iterations as your operations evolve.
Why Upotto
The Upotto ERP includes a Flutter mobile app that sales reps use daily for order entry and payment collection. We didn't prototype it — it runs in production.
A mobile field app needs to be focused, fast to load, and resilient to poor connectivity. We don't take a full web UI and shrink it — we design for mobile workflows from the start.
Most integration problems happen at the seam between mobile and backend. When we build both, there's no handoff friction and no guesswork about what the API returns.
App Store and Google Play submission involves signing certificates, metadata, screenshots, and review. We manage all of it — including future update releases.
Related Services
The backend APIs that power your mobile app's data, authentication, and business logic.
Explore serviceConnect your mobile app to existing systems — ERP, accounting, CRM, and third-party services.
Explore serviceWhen you need a complete system — web + mobile — built together around your operations.
Explore serviceFAQ
Tell us about your field operations, client-facing needs, or internal workflows. We'll scope a Flutter app that fits your backend and your team.
