Mobile App Development — GreyCube Technologies

Mobile App Development

Build powerful Android, iOS and cross-platform apps around your ERPNext.

Take ERPNext beyond the desktop with custom mobile apps for field service, sales, employee self-service, warehouse management, CRM, dealer operations, and HR approvals. Built for Android and iOS, our apps connect directly to your Frappe backend, giving every team the tools and data they need, wherever they work.

One code for Android & iOSReact Native + Expo, shipped to Play Store and App Store
Personalised AppCustomized as per your organization specific requirements

Platforms

Built for every device your team carries

Native where it counts, shared where it saves you money — you get the same app quality on both stores.

Android apps

Native-grade Android builds published to Google Play, with access to device hardware and background services.

  • Background location & push
  • Kotlin native modules where needed
  • Play Store Submission, Firebase

iOS apps

Polished iOS apps through the App Store — we handle Apple's build, signing, provisioning and review requirements for you.

  • App Store submission & review
  • TestFlight beta distribution
  • Notification via APNs , Firebase

Cross-platform apps

One React Native + Expo codebase for both platforms — lower cost, faster releases and over-the-air updates without a store round-trip.

  • Single codebase for Android & iOS
  • EAS build & OTA updates

20+ apps in production

Field service, sales and delivery apps live on real ERPNext sites.

Built for Your Business

Customize features and workflows to match your organization’s requirements.

Straight to Frappe

Reads and writes hit your doctypes — no duplicate database to maintain.

One team, end to end

The ERPNext-side APIs your app needs are built by us — so there's no second vendor to manage and no bridge-API requirements to coordinate.

What we build

Apps for the task that happens off the desk

Work from anywhere, collect information on your phone, and keep everything updated in ERPNext.

Field Service & Job Cards

Technicians pick up jobs, capture readings, photos and signatures on site — all synced when they're back online.

Live: Job Cards | Services

Sales Force Automation

Orders, visits, beat plans and call logs from the field, feeding your sales pipeline in real time.

Live: AMRUT SFA

Location-Based Services & Routing

Track field staff in real time, trigger location-based actions and tasks, and plan the most efficient multi-stop routes.

Live: GPS Tracking

Inventory & Warehouse Management System

Barcode and QR stock moves, cycle counts and picking — accurate stock without the paper trail.

Live: Stock App | Jammy

Employee Self Service Management

Claims, reimbursements and approvals on the go — approve POs, leaves and quotes straight from a phone.

Live: ESS App

Your domain next

Tell us where you operate — we'll scope it.

In the field

A look inside the apps we've shipped

Real screens from live ERPNext mobile apps — swipe through to see how each one works.

Capabilities

What we can put in the app

The device features that make a mobile app worth opening instead of a mobile website.

Barcode & QR scanning

Scan items, assets and documents to pull up or update the matching ERPNext record instantly.

Push notifications

Alerts for new jobs, approvals and status changes over Firebase (FCM) and Apple (APNs).

Location-based services

Background geolocation, geofencing and optimized multi-stop routing for field and delivery teams.

Camera, photos & signatures

Attach site photos, scanned docs and on-screen signatures directly to the source document.

Biometric login

Fingerprint and face unlock, plus your existing ERPNext login works in mobile.

Shareable crash logs

Detailed crash logs appear right in the app, ready to be copied and shared so issues get fixed fast.

How we work

How an app ships

From a paper workflow to a published app, with the offline and store details handled along the way.

01

Discovery & flows

We map the field workflow, offline needs, target devices and the ERPNext data behind it.

02

Design & prototype

Screens and interactions designed for one-handed field use, validated on-device early.

03

Build & sync

React Native app wired to Frappe, offline outbox in place, tested against real data.

04

Ship & support

EAS builds to both stores, push set up, then OTA updates and monitoring after launch.

Under the hood

The stack we build on

Proven, well-supported tools — so the app stays maintainable long after launch.

React Native + ExpoOne codebase, native modules
EAS build & OTAApp store ready + live updates
Notification - FirebaseOn demand-or-scheduled notifications
Frappe REST API & SDKUse standard API, enforce standard permissions

Have a mobile app requirement stuck on paper or WhatsApp?

Tell us the field process — we'll scope the app, the offline model and the store path, and give you a straight answer on effort and timeline. No hard sell.