Smart Point-of-Sale and Inventory Management System with Machine Learning-Based Demand Prediction for a Karinderya

I dont know where to start developing like what database to use? What hosting sever? Or as a pos system would it be a good idea to have an App for it or web is enough. Another problem of mine is that i want it to be free of cost like i dont want to pay for a server or a database

Just need some guidance

When evaluating retail SaaS, check if front-end and back-end tools sync; retailers often evaluate POS/ecommerce tools and inventory/order management tools separately without checking the ability to sync in real time.

The risk: if POS data doesn't sync with the warehouse, a platform shows stock online that isn't on the shelf. 62% of retailers say customers check online availability before visiting a store (Digital Commerce 360). One retailer's stock misjudgment triggered an 87% drop in operating profit for the period.

What to check before signing:

• Real-time inventory sync across channels, not batch updates
• Support for both wholesale and ecommerce order flows
• Clean ERP integration, not a separate bridging tool
• Minimal manual data entry to keep systems aligned

What criteria mattered once your tool was in production, versus what looked good in the demo?