Building a "Business OS" for India's 63+ categories — would love feedback from this community

Hey PH community 👋

I'm building Udhyam One — a business management platform for India's small and mid-range retailers and distributors, covering everything from kirana stores to saree wholesalers to pharmacies. Launching here soon and wanted to start the conversation early.

The problem I kept running into while talking to shop owners across Gujarat: every "billing software" treats every shop the same way. A saree shop needs to track color as its main variant. A pharmacy legally needs batch and expiry tracking. A footwear shop's GST rate depends on MRP, not category. Most tools force all of these into one rigid model.

So instead of building another billing app, I built a template engine — 63+ business types, each configured with its own inventory logic, GST rules, and required fields.

A few things I'd love this community's thoughts on before launch:

1. If you've used billing/inventory tools for a small business (in India or elsewhere) — what's the one feature you wished existed but never found?

2. For founders who've built vertical SaaS for a fragmented market like this — how did you decide which segments to prioritize first?

3. Any feedback on positioning — "Business OS for MSMEs" vs. more specific category language?

Happy to answer anything about the technical side too — built solo using Flutter (Android/iOS/Web) and Supabase.

Thanks in advance 🙏