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Built a genuinely offline POS app for Indian retail shops — now selling the full source code

By dxmon7s
August 30, 2026

I built MargPOS Desktop — a fully offline Windows POS/ERP app for small Indian retail shops (Electron + React + SQLite, zero cloud dependency). It has GST billing (CGST/SGST/IGST + Composition Scheme mode), PIN-based Owner/Staff login, offline hardware-locked licensing with a key generator, barcode/QR scanning, customer khata, and an in-app auto-updater — all already built and working.

One shop is actively using it as a real test case. I no longer have the time to keep pushing this forward alongside other work, so I'm selling the full source code and ownership as a one-time deal — asking $2,500–$4,000.

Demo video: https://youtu.be/QsR3HRyeJuI

Happy to answer questions about the tech stack, architecture, or licensing system in the comments.

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  1. 1
    The one active shop is probably the most valuable part of this asset. Curious whether buyers are valuing the source code itself, or the fact that the India-specific offline POS workflow is already tested in a real shop.
    Aryan Sinh's avatar Aryan Sinh
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    3 days ago
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      Both, honestly — but the real-shop testing is what seems to matter more to buyers. Anyone can write POS code, but proving it handles actual daily billing, GST edge cases, and offline reliability in a live retail shop is much harder to fake or fresh-build from scratch.

      Happy to share more details or a demo if you're seriously exploring this. What's your use case?

      dxmon7s's avatar dxmon7s
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      3 days ago
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        That makes sense. The real-shop validation is probably the stronger asset because it reduces the buyer’s uncertainty about whether the system works beyond a demo. I’m mainly looking at the acquisition angle rather than deploying it myself.
        Aryan Sinh's avatar Aryan Sinh
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        3 days ago
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          Good point — the real-shop validation is exactly why I think this is a stronger buy than a from-scratch build. It's not a demo-only project, it's been running actual billing/GST/inventory workflows. If you're looking at it from an acquisition angle, happy to share more details — full source code, licensing system already built (trial + paid key generation), and a demo video. Drop your email here or let me know how best to reach you, and I'll send everything over.
          dxmon7s's avatar dxmon7s
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          3 days ago
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            Would be happy to take a look. What’s the best email to reach you on?
            Aryan Sinh's avatar Aryan Sinh
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            2 days ago
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              Thanks for the interest! You can reach me at dxmon.7s@gmail.com — I'll send over the demo video, source code details, licensing system overview, and pricing. Looking forward to it.
              dxmon7s's avatar dxmon7s
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              2 days ago
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                Thanks! I’ve just sent it over.

                Looking forward to hearing your thoughts whenever you have a chance.

                Aryan Sinh's avatar Aryan Sinh
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                2 days ago
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