What it does
CSROI is the de-facto standard for "should I open this case?" math. It pulls live Steam Market prices for every drop from every active and discontinued case, weights by drop probability, subtracts Steam fees, and surfaces the expected return of one opening. The same engine drives a comparable view for the CS2 Armory rotation. A separate page tracks cross-marketplace arbitrage opportunities.
The site is free, fast, and updated frequently. Its main weakness: limited explanation of methodology and no historical charts — you see today's number, not the trend.
Pros & cons
Pros
- Most up-to-date case ROI calculator on the web
- Covers active, discontinued, and rare cases
- Includes Armory rotation calculator
- Includes a competent arbitrage scanner
Caveats
- No historical ROI chart — only today's number
- Methodology not fully transparent
- Single price source per item (Steam Market)