Show HN: A simple interactive ROI calculator that visualizes investment returns

I built a free, interactive ROI calculator that helps people understand the financial impact of their investments.

It calculates and visualizes:

- Return on Investment percentage with a circular progress indicator

- Net Present Value (NPV)

- Internal Rate of Return (IRR)

- Payback Period

- Cash Flow projections over time

- Annual breakdown of returns

Key features:

- Customizable yearly revenue and cost projections

- Save multiple calculation scenarios to compare different investment options

- Embeddable results that can be shared on your own website

- Responsive design that works well on mobile and desktop

- No sign-up required, all calculations are done client-side

I built this because most ROI calculators I found were either too simplistic (just a basic formula) or too complex (requiring financial expertise). ViewRoi makes it easy for entrepreneurs, small business owners, and investors to visualize the potential outcomes of their investments.

Live demo: https://viewroi.com

Feedback welcome - especially on making the calculator more intuitive or adding useful metrics!