An Offline POS (Point of Sale) system allows businesses to continue billing and sales operations without an active internet connection. It ensures uninterrupted business operations in environments where internet connectivity is unreliable or unavailable.

The Offline POS system stores transactions locally on the device and automatically syncs data with the central ERP/server once the internet connection is restored.

Problem Statement

Many retail and service businesses face challenges such as:

• Internet outages during peak business hours
• Remote locations with poor connectivity
• Dependency on real-time server access for billing
• Sales loss due to POS downtime

Traditional online-only POS systems fail under these conditions, causing operational delays, customer dissatisfaction, and revenue loss.

Solution Overview – Offline POS

The Offline POS solution enables:

• Seamless billing without internet
• Secure local data storage
• Automatic data synchronization
• Zero business disruption

This approach ensures business continuity and improves customer experience.

How Offline POS Works (Workflow)

1. User logs into POS (online once for authentication)
2. Product, customer, and price data is cached locally
3. Sales transactions are created offline
4. Data is saved in local storage (SQLite / IndexedDB)
5. Internet reconnects
6. Automatic sync to ERP/backend server
7. Conflict handling & validation 8.Sync confirmation

Key Features of Offline POS

1 Offline Billing

• Create invoices without internet
• Generate receipts
• Apply discounts and taxes offline

2 Local Data Storage

• Products
• Price lists
• Customers
• Tax rules
• Payment modes

Stored securely on the device.

3 Auto Sync Mechanism

• Background sync when internet is available
• Retry mechanism on failure
• Sync status indicator

4 Conflict Resolution

• Duplicate invoice prevention

5 Secure Access

• Role-based user permissions
• Device-level authentication
• Encrypted local storage

Supported Transactions

Offline POS supports:

• Sales Invoices
• POS Invoices
• Cash Payments
• Card Payments (optional offline capture)
• Customer Selection
• Item-level discounts
• Tax calculations

Benefits of Offline POS

• Zero downtime sales
• Faster checkout
• Improved customer satisfaction
• Works in low-connectivity areas
• Reduced dependency on internet
• Reliable data consistency