Your store runs
without the internet.
VentOS is the offline-first retail operating system. POS, inventory, customer loyalty, and cloud sync — built for stores that cannot afford downtime.
Everything you need
One system.
Every device.
VentOS replaces five separate tools with one integrated platform that keeps working even when your connection drops.
Point of Sale
Frameless POS that works 100% offline. Process sales, print receipts, and track every transaction — no internet required.
Inventory Management
Real-time stock levels across all branches. Low-stock alerts, expiry tracking, and barcode scanning built in.
Staff & Roles
Assign admins, managers, and cashiers. Every action is traceable — know who sold what, when, and where.
Smart Sync Engine
Custom HLC-powered sync queues changes locally and pushes to Supabase when online. No conflicts, no data loss.
Receipts & Loyalty
POS receipts with customizable templates. Built-in loyalty points, credits, and customer spend tracking.
Offline Resilience
SQLite is your source of truth. Internet goes down? Zero interruption. Everything keeps running.
Built for serious operators
Beyond the till.
The same offline engine powers a layer most POS systems never reach — fraud detection, cash control, demand forecasting, and tax-grade e-invoicing, all running on your own devices.
Fraud & Loss Prevention
A hash-chained audit trail and a live rules engine flag excessive voids, post-sale reversals, high-value voids, and clock tampering — surfaced to admins in real time.
Cash Drawer Management
Open and close drawers per shift with counted floats. Over-threshold variance on close raises an instant alert so shortfalls never slip through.
Demand Forecast & Reorder
Recency-weighted velocity turns sales history into days-of-cover and suggested order quantities — so you restock before you run dry.
From zero to
running store.
Four steps. Two minutes. No servers, no cloud dependencies, no downtime.
Install on any Windows PC
One installer. No server setup. VentOS bundles SQLite and runs locally — you're operational in under two minutes.
Create your Organization & branches
Add your stores, products, and staff. Everything lives in a fast local database. No cloud latency, no server config.
Sell offline, all day
Process sales, scan barcodes, print receipts. Inventory updates instantly. Internet outage? Nobody notices.
Auto-sync when online
The HLC engine queues every change. Once connected, it syncs to VentOS Cloud without conflicts — all branches stay aligned.
Run the floor
from your pocket.
The companion app for Business Owners. Watch your business in real time, ring up sales on the go, and print receipts to any desktop — all backed by the same offline-first sync engine.
Real-time sales feed
Every sale across every branch streams in live, attributed to the staff and device that rang it up.
Live store dashboard
Today's revenue, payment mix, inventory health and low-stock alerts — the whole store at a glance, wherever you are.
Sell & print remotely
Ring up a cart from your phone and send the receipt to any paired desktop — it prints while the sale syncs everywhere.
Built for real retail
Stores that never stop.
100%
Offline
0
Monthly fees
2min
Min to set up
∞
Branches
Start now
Ready to run
without limits?
Download VentOS on Windows. No registration wall, no demo mode — the full system from the first launch.
Version 1.0 · 64-bit · Free to use