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Multi-Store Grocery App — Flutter Source Code
Multi-store Flutter grocery platform for chain operators, franchise networks, and multi-location grocery businesses. Customer app, store app, shopper-picker app, and multi-store admin — manage every location from one dashboard. $3,000 Single Extended License.
live · 1,872 baskets today
pick accuracy 99.2%
Architecture
How the multi-store architecture works
This is the section that justifies the price step from $1,500 single-store to $3,000 multi-store. Everything below is built in — no custom engineering required to turn it on. Each store is a first-class entity, the multi-location data model runs per-store inventory, pricing, hours, and commission, and the customer app reads the right values based on which store the order is sourced from. None of this exists in the single-store sibling, which assumes one inventory table, one price list, and one zone.
Per-store data model
Every store is a first-class entity with its own inventory table, price list, operating hours, slot capacity, delivery zone polygon, staff roster, commission rate, and payout schedule. Two stores in the same chain run different prices for the same SKU without forking the codebase — no overrides, no hardcoded chain-level defaults.
Multi-zone delivery engine
Delivery zones are stored as MongoDB 2dsphere polygon-defined zones, each attached to one or more stores. When a customer enters an address, the backend uses $geoIntersects to surface only the stores that deliver into that zone — each with its own fee structure (flat, distance-based, or surge-tiered), slot capacity, and availability hours.
Store-level pricing and inventory
Each store manages its own stock through the store app. Out-of-stock items hide automatically for that store only, while neighbouring stores stay live. Promotional pricing is store-scoped or platform-scoped — a chain can run a coupon across all 30 stores or a single-store flash sale, applied per the store the cart is sourced from.
Zone-routed shopper-picker dispatch
Shopper-pickers are assigned to one or more zones. The backend matches each order to a shopper inside that zone and never dispatches across zones. This matters operationally — shopper retention drops fast when the app sends them across the city for a low-margin order.
Per-store commission terms
Every store has its own commission rate (5–15%) and payout cadence. The admin calculates payouts per store per period, exports per-store statements, and supports franchise reporting where each franchisee sees only their own performance.
Cross-store reporting at admin level
The multi-store admin rolls up data across every store: total orders, gross merchandise value, average order value, shopper utilisation by zone, refund rate per store, and CPG ad performance — scoped by store, zone, category, or date range, with drill-down into a single location's P&L.
Pick the tier
Why $3,000 versus $1,500 single-store
The price step is honest scope, not branding. The $1,500 single-store grocery app ships three apps and one admin against a single-store data model. This $3,000 build ships three Flutter apps and a multi-store admin against a per-store data model with MongoDB 2dsphere zones, store-scoped inventory and pricing, zone-routed shopper dispatch, a per-store commission engine, and cross-store reporting — roughly 40% more backend surface and a different data model, not a feature flag. Retrofitting multi-store onto a single-store codebase later runs 4–6 weeks of engineering at $25/hr, so buying the right tier on day one beats re-platforming on day 180. Want the marketplace pattern instead — multiple retailers, third-party shoppers? See the Instacart clone app.
Single-store
Readymade Grocery Online Store
One location · one catalog
One inventory table, one price list, one zone, one commission relationship. Adding a second store requires custom engineering. The right tier if you operate one location today and one location next year.
$1,500 one-time Multi-store
Multi-Store Grocery App
3–50 locations · per-store data model
Per-store inventory, pricing, hours, staff, commission, and MongoDB 2dsphere delivery zones — all from one multi-store admin. Unlimited stores, no per-store license fee. The right tier the moment you have a second location on the roadmap.
$3,000 one-time Custom
Bespoke Flutter agency build
Any architecture, any scope
Full ownership too, but 14–18 weeks and a budget that needs a round. IFA's three-tier grocery ladder is the only Flutter-native stack we know of in this category with a documented migration path between tiers.
From $40,000 After purchase
Customisation services — $25/hr
Source code is yours after purchase. Our team handles post-purchase customisation at $25/hr or a fixed-bid quote against a defined scope — fixed-bid quotes start at $2,000, hourly engagements bill weekly. See our Flutter development services and mobile app development services, or contact our team with your scope and we will come back with a quote inside one business day.
Per-store POS integration
Square, Shopify POS, Lightspeed, or bespoke REST connectors. 2–4 weeks per connector depending on whether the source system pushes updates or needs polling.
Custom zone configuration
Bespoke zone-pricing logic — time-of-day surge per zone, weather-aware delivery fees, capacity throttles tied to shopper supply.
Franchise reporting templates
Per-franchisee P&L exports, royalty calculation engines, and custom commission tiers for franchise networks.
Subscription membership tier
BigBasket BB Now or Instacart Plus-style monthly membership — a recurring-revenue add-on, typically 3–4 weeks of work.
Additional payment gateways
PayPal, Adyen, MercadoPago, or region-specific rails wired alongside the shipped Stripe and Razorpay support.
Advanced analytics
Cohort retention by store, shopper lifetime value, and zone-level unit economics on top of the cross-store reporting baseline.
Preview
See it in action
Customer
Store
Picker
Scope
What you get
Multi-location grocery delivery. Flutter-native. Four apps, one multi-store admin.
You receive the complete multi-location / chain operator package — the Flutter apps, the backend, and the full source code at handover — for a one-time $3,000. No subscription and no per-order fee: buy it once, brand it your way, and ship it under your own developer accounts. The list below is exactly what's in the box, and exactly what isn't.
In the box
What's included — and what's not
What you get
- Flutter customer app — iOS + Android, nearest-store auto-detect
- Flutter store app — per-location inventory, orders, staff
- Flutter shopper-picker app — zone-routed pick lists, barcode scan
- Multi-store admin dashboard — every location from one panel
- Per-store inventory, pricing, hours, and commission rates
- Multi-zone delivery configuration
- Cross-store reporting at admin level
- Real-time order tracking on map
- Stripe + Razorpay + COD payment support
- Full Flutter + NestJS + MongoDB + Redis source code
What's NOT included
- Single-store variant for solo operators (see the $1,500 single-store sibling)
- Per-store POS integrations beyond standard webhooks (paid add-on per POS)
- Franchise contract management or per-store legal agreements
- Server hosting or cloud infrastructure
- App Store / Play Store submission (paid add-on)
- Product inventory — you populate per location via the CMS
Buyer fit
Who's this for?
Supermarket chain (3–50 stores)
Regional chain adding delivery across all locations. One admin, multiple store panels, unified customer app.
Franchise grocery operator
Franchised grocery brand deploying the same ordering platform across independently operated franchise locations with per-store commission terms.
Dark store / rapid delivery network
Zepto or Getir-style micro-fulfillment operator running multiple warehouses with sub-30-minute delivery and zone-based dispatch.
B2B grocery aggregator
City-level platform onboarding multiple independent grocery stores to serve restaurants, cafes, and small businesses with case-pack pricing.
Features
Feature breakdown by role
Customer App
- ✓Nearest-store auto-detection by geolocation
- ✓Browse single store or aggregated cross-store catalogue
- ✓Per-store cart with location-aware pricing
- ✓Slot-based delivery scheduling per zone
- ✓Cart + coupons (store-level and platform-level)
- ✓Real-time order tracking on map
- ✓Multi-payment — Stripe, Razorpay, COD
- ✓Order history + cancel
- ✓Ratings + reviews per store
- ✓Push notifications
Store App (per location)
- ✓Per-store inventory + stock management
- ✓Store-level pricing and offers
- ✓Order accept / reject + status update
- ✓Store-specific operating hours and slot capacity
- ✓Staff management per location
- ✓Sales analytics scoped to this store
- ✓Payout history with per-store commission view
Shopper-Picker App
- ✓Zone-routed assignment — only orders inside the shopper's zone
- ✓Aisle-ordered pick list per store
- ✓Barcode scan verification
- ✓Substitution approval chat with customer
- ✓Real-time route navigation between store and customer
- ✓Earnings dashboard with per-zone rates
- ✓Order history
Multi-Store Admin Dashboard
- ✓Onboard, edit, and deactivate stores from one panel
- ✓Cross-store revenue, order, and inventory reporting
- ✓Per-store commission rate configuration (5–15%)
- ✓Multi-zone delivery fee engine
- ✓Coupon engine — platform-wide or store-scoped
- ✓Promoted store and product placement console
- ✓Push notification broadcast (all customers or geo-targeted)
- ✓Refund and dispute handling across all stores
- ✓Live operations map showing every active shopper and store
Customer App
Store App
Shopper-Picker App
Business model
Revenue model
Store-level commission (5–15%)
Charge each onboarded store a percentage of every order routed through the platform. Configurable per store and per category.
Zone-based delivery fees
Distance and zone-aware delivery charge — different fee structures for dense urban zones versus suburban or sparse-density zones.
Franchise fees from operators
Recurring fee from franchise locations using the shared platform — a steady revenue stream distinct from per-order economics.
Promoted store listings
Charge stores for top placement in the customer app for their geo-zone. Mirrors Instacart's CPG ad model at the store level.
CPG advertising
Sell promoted product placements to brands and suppliers across all stores. Highest-margin revenue line in mature grocery platforms.
your platform revenue
$0/month
One-time license $3,000 — pays for itself in — at these numbers.
Illustrative math — drag the sliders to your market.
Why Flutter
The Flutter advantage
One codebase, iOS + Android
Flutter compiles a single Dart codebase to native iOS and Android binaries. You ship two apps without maintaining two separate codebases or two separate engineering tracks.
60fps on every screen
Flutter renders directly to a Skia/Impeller canvas — no JavaScript bridge, no WebView overhead. Every scroll, transition, and live-tracking update runs at 60fps on mid-range Android hardware.
One team to maintain and extend
Because the entire stack — customer app, vendor app, driver app — is Dart, a single Flutter developer can fix a bug and redeploy to both stores. No context-switching between Swift and Kotlin teams.
Faster release cycles
IFA ships Flutter apps. Our 250+ Flutter developers have delivered readymade products and custom builds since 2010. When you need a new feature, the team that built the product extends it — no handoff friction.
Tech
Stack we ship
Frontend
FlutterDart
Backend
NestJS
Data & cache
MongoDBMongooseRedis
Payments
StripeRazorpay
Maps, push & SMS
MapboxFCM
Process
How we deliver
-
Discovery + configure
Confirm store count, zones, commission terms, payment rails. Source code delivered within 24 hours of purchase.
-
Brand + onboard stores
Apply brand identity. Onboard each store with its catalogue, hours, pricing, and zone assignment via the multi-store admin.
-
Configure zones + payments
Define delivery zones using MongoDB 2dsphere polygon-defined zones, set per-zone fees, wire Stripe and Razorpay, and configure per-store commission rates.
-
Launch + support
Submit customer and shopper apps to Play Store and App Store. Launch store-operator app to franchise team. 60 days of crash triage and zone-config tuning included.
Pricing
$3,000 Single Extended License
Recommended
Multi-location / chain operator
$3,000 one-time
Full Flutter source code for iOS + Android. Buy once, customise, rebrand, and launch — no subscription, no per-order fee.
- Flutter customer app source code (iOS + Android)
- Flutter store-operator app source code (per-location panel)
- Flutter shopper-picker app source code
- NestJS + MongoDB + Redis backend source code
- Multi-store admin dashboard source code
- MongoDB 2dsphere multi-zone configuration module
- Setup documentation
- 3 months email support
- No per-store license fees — one $3,000 payment covers unlimited stores
Post-purchase customisation available — $25/hr. Request Customisation
Compare
Readymade vs Custom
| ★ Readymade · $3,000 | Custom build · from quote | |
|---|---|---|
| Price | $3,000 | From $40,000 to $80,000+ |
| Timeline | 5–7 weeks to configure + launch | 14–18 weeks |
| Source code | Included — yours to own | Included — yours to own |
| Multi-store architecture | Built in — unlimited stores | Built to spec |
| Customisation | Brand + config level | Full — any scope |
| Per-store POS integration | Standard webhooks + paid connector add-on | Unlimited connectors |
| Support | 3 months email | Dedicated project team |
FAQ
Common questions
How is this different from the single-store grocery app at $1,500?
The Multi-Store Grocery App ($3,000) is built around a multi-location data model — every store has its own inventory, pricing, hours, staff, commission rate, and delivery zone, all managed from one admin. The Readymade Grocery Online Store ($1,500) is a single-store product without multi-location management, multi-zone dispatch, or cross-store reporting. If you operate one location, the $1,500 sibling is the right tier. If you operate three or more locations, run a franchise, or aggregate independent stores, this is the correct product.
How many store locations can the app support?
There is no hard cap. The architecture supports unlimited stores from one admin panel — operators run anywhere from 3 stores to 50+ on the same codebase. For very large deployments (100+ stores), contact us for a pre-purchase scope review so we can confirm Redis and MongoDB sizing for your peak load.
Is there a per-store license fee?
No. The $3,000 Single Extended License is a one-time payment that covers unlimited stores on one production deployment. No per-store fee, no per-seat fee, no recurring royalty.
Does the admin support franchise reporting?
Yes. The multi-store admin breaks down orders, revenue, and commission by store, by zone, and by date range. Franchise operators can scope a store-level view per franchisee and export per-store reports for franchise accounting.
Does the app support multiple delivery zones?
Yes. Delivery zones are defined as MongoDB 2dsphere polygons and configurable per store location. Each zone can have its own delivery radius, fee structure, slot capacity, and availability hours. Customers see only the stores that deliver to their address.
Can I integrate per-store POS systems?
The backend exposes standard inventory and order webhooks that most modern POS systems can read and write. Bespoke POS connectors (Square, Shopify POS, Lightspeed, or custom REST endpoints) are a paid add-on — typically 2–4 weeks of work per connector at $25/hr.
What is the source code stack?
Flutter (Dart) for the customer, store, and shopper-picker apps. NestJS (TypeScript) for the backend. MongoDB with Mongoose and 2dsphere geo-index for the data layer and multi-zone geo queries. Redis for per-store cart sessions and slot capacity. Stripe and Razorpay for payments. Mapbox for routing. FCM (Firebase Cloud Messaging) for push.
I started on the single-store sibling — is there an upgrade path to multi-store later?
Yes. Operators who outgrow the [single-store grocery app at $1,500](/products/readymade-grocery-online-store/) can migrate to this multi-store build. Catalogues, orders, and customer accounts transfer through a documented migration script. The customer-app brand identity carries over so existing users keep the same app. Plan 2–3 weeks for the migration depending on order history volume.
Ready to ship?
Get the source code — start in days
$3,000 Single Extended License. Flutter source code for iOS + Android. Customise, rebrand, and launch.