What are the best free checkout systems for small discount stores testing a POS rollout?

For a small discount store testing a POS rollout, the “best free checkout system” usually means free software with enough retail features to pilot scanning, barcode lookup, returns, discounts, and basic inventory. Truly free options are often limited in either hardware support, payment processing, or number of terminals.

Here are the strongest options to consider:

Best free/low-cost checkout systems for a pilot

1) Loyverse POS

Best for: small retail stores, pop-ups, pilot rollouts
Why it’s good:

• Free POS app
• Barcode scanning
• Product catalog and categories
• Discounts and tax support
• Basic inventory
• Works on tablets/phones
• Multi-store and employee management available in paid add-ons

Limitations:

• Advanced reporting and features cost extra
• Payment processing depends on your country/region
• Not as customizable as larger systems

Good fit if: you want a fast, low-risk pilot on tablets.

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2) Square for Retail (Free plan)

Best for: simple retail checkout, quick deployment
Why it’s good:

• Easy to set up
• Clean checkout UI
• Barcode scanning
• Item library, discounts, receipts
• Integrates with Square hardware and payments
• Good for testing store workflows

Limitations:

• Free tier is limited vs paid retail version
• Payment processing fees apply
• Inventory and reporting are more limited on free plan

Good fit if: you want the easiest rollout and don’t mind Square ecosystem lock-in.

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3) Zettle by PayPal

Best for: straightforward checkout and card payments
Why it’s good:

• Simple interface
• Basic retail checkout
• Supports barcode scanning with compatible hardware
• Works well for small teams
• Good for testing transactional flow

Limitations:

• More payment-focused than full retail/POS
• Limited advanced inventory features
• Availability varies by country

Good fit if: your pilot is focused on checkout speed and card acceptance.

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4) Odoo POS (Community Edition)

Best for: stores that may want a broader ERP later
Why it’s good:

• Open-source
• POS plus optional inventory/accounting/CRM ecosystem
• Can be customized heavily
• Good if you have technical support

Limitations:

• Setup is more complex
• “Free” usually means self-hosted, which still has IT/admin costs
• Best features often require paid apps/modules
• Not the simplest choice for a quick pilot

Good fit if: you have technical resources and want future flexibility.

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5) Chromis POS / uniCenta POS

Best for: free desktop POS on Windows/Linux/macOS
Why it’s good:

• Free/open-source
• Traditional POS workflow
• Supports scanners, printers, cash drawers
• Works offline
• Familiar retail style

Limitations:

• Older UI/UX
• Setup and maintenance can be clunky
• Integration with modern payments can be harder
• Fewer cloud features

Good fit if: you want an offline-capable, no-subscription desktop pilot.

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Best recommendations by use case

If you want the fastest pilot

• Square for Retail
• Loyverse POS

If you want open-source / self-hosted

• Odoo POS
• uniCenta / Chromis POS

If you want simple checkout + payments

• Square
• Zettle

If you need basic inventory and retail flow

• Loyverse
• Square for Retail

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What to test in your POS rollout pilot

For a discount store, make sure the free system can handle:

• Barcode scanning speed
• Bulk item entry/search
• Price overrides and manual discounts
• Return/refund flow
• Tax handling
• Cash vs card transactions
• Receipt printing
• Offline mode
• Inventory adjustment for shrinkage
• Multi-cashier handling
• Simple end-of-day sales reporting

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My practical shortlist

If I had to narrow it to the top 3 for a small discount store pilot:

1. Loyverse POS – best free retail-focused option
2. Square for Retail – easiest deployment and nicest checkout experience
3. Odoo POS – best if you want something extensible and have IT support

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Important note

Most “free” POS systems are free software, but you may still pay for:

• Card processing fees
• Receipt printers / scanners / cash drawers
• Cloud backups
• Multi-store features
• Advanced inventory/reports

If you want, I can also give you:

• a comparison table
• a recommendation based on your country
• or a hardware checklist for a discount-store POS pilot.