# InvoiceNumberGenerator vs OIData compared

> InvoiceNumberGenerator vs OIData: pricing, platforms, launches, upvotes and founders side by side on ProductsFarm, with notes on which to pick.

Canonical: https://productsfarm.com/compare/invoicenumbergenerator-vs-oidata
Last updated: 2026-11-10

|  | [InvoiceNumberGenerator](https://productsfarm.com/product/invoicenumbergenerator) | [OIData](https://productsfarm.com/product/oidata) |
| --- | --- | --- |
| What it is | Tracks unpaid invoices and client balances in your browser — free, no sign-up. | Open interest analytics for Indian index, stock and commodity options and |
| Pricing | Freemium | Paid |
| Platforms | Web | API, Web |
| Categories | Finance, Productivity | Analytics, Finance |
| Made for | freelancers, small business owners | options traders, derivatives traders, market analysts |
| Built with | [Cloudflare](https://productsfarm.com/tech-stack/cloudflare) | [Vue](https://productsfarm.com/tech-stack/vue), [Cloudflare](https://productsfarm.com/tech-stack/cloudflare), [Bootstrap](https://productsfarm.com/tech-stack/bootstrap) |
| Upvotes | 0 | 0 |
| Website | [invoicenumbergenerator.com](https://invoicenumbergenerator.com/invoice-tracker) | [oidata.in](https://www.oidata.in/) |

## About InvoiceNumberGenerator

Invoice Tracker is a web app from Invoice Number Generator for keeping track of invoices that are still waiting to be paid. Entries are saved locally in your browser, and each one shows its due date, amount and client. The tracker sorts unpaid invoices into aging buckets, so you can see what is current, what is 1 to 30 days overdue, 31 to 60 days overdue, and more than 60 days overdue. Totals are kept separately for each currency, and paid invoices leave the buckets.

You can add invoices by hand, or import them from a CSV file using a column template. The import preview shows errors with their file line numbers so you can fix them before saving. Invoices created with the site's invoice generator can be copied into the tracker after you download or send them. The copy does not change when you later edit the original invoice. Raw CSV and JSON backups are free to export, which matters because local data is removed if browser data is cleared.

The tracker suits freelancers and small businesses that want a simple view of who owes them money without signing up. Starter and Pro plans add cloud save and sync, formatted Excel and PDF statement reports, and a premium spreadsheet template. Pro also adds automatic payment reminders and recurring invoices for cloud-saved invoices.

## About OIData

OIData is a web dashboard for reading open interest in Indian derivatives markets. It covers NIFTY, SENSEX, NIFTY BANKNIFTY and other indices, around 200 F&O stocks, and nine MCX commodities including crude oil, gold, silver and natural gas. Users connect their own SEBI-registered broker account, and the tool displays and analyses the market data available through that connection. It does not place orders.

The suite includes a live option chain with max pain and support and resistance levels, Trending OI, a Session Chart with call and put walls, the pin, the gamma flip and VWAP drawn at their prices, and a Dealer Positioning view that shows net GEX by strike. There are also screeners for gamma exposure, trending OI and futures buildups, a Market Mood Index, India VIX and IV surface views, straddle and strangle premium tracking, strike history from listing to expiry, FII and DII activity, and seasonal charts. Alerts can be sent on Telegram.

It is aimed at active index and derivatives traders and market analysts in India who want open interest data in one place. OIData is not a SEBI-registered adviser and states that its outputs are for research and education, not buy or sell recommendations.

## Related

- [InvoiceNumberGenerator](https://productsfarm.com/product/invoicenumbergenerator)
- [OIData](https://productsfarm.com/product/oidata)
- [More comparisons](https://productsfarm.com/compare)