∆ Stack · code. markets. math.

Sharp tools for people who code, trade, or both.

Small, honest, technical tools that each do one thing well — and respect you while they do it. Everything runs in your browser. No signup, no tracking, and your data never leaves your device.

Runs client-side No signup No tracking Your data stays yours
Meet the lineup → Why ∆ Stack
Newest · Quant

Edge

A high win rate doesn't mean you're profitable. Enter your win rate and average win/loss to see your real expectancy — and the win rate you'd actually need to break even.

Open Edge →
01

For people who code

3 live
02

For people who trade

3 live
03

In progress

coming soon
Why ∆ Stack

Your data never leaves this page.

Works with your wifi off

Our tools compute in your browser, not on a server. Nothing you type is uploaded, logged, or sent anywhere — so most of them keep working even with no connection at all.

No account, no funnel

No sign-up wall, no email capture, no "start free trial." Open the page and the tool just works. Free tools stay free.

No tracking, no dark patterns

No analytics scripts following you, no cookie maze, no nudges designed to trap you. The page loads fast because it isn't carrying any of that.

Built by people who use them

We build for ourselves first — people who actually code and trade. If a tool wouldn't earn a place in our own workflow, it doesn't ship.

How it works

Free

Tools that respect you

Every tool here is free and runs in your browser. No account, no tracking, nothing sent to a server. They're useful on their own — and they're how you learn whether to trust the rest.

Paid

Tools that give an edge

When tools need to save your work across devices or run heavier analysis, those become paid and hosted. You only pay for the edge — never for the basics.

Always

Honest by default

Estimates are labeled as estimates. Limits are stated plainly. Your data is yours to export and keep. No dark patterns, no fluff — just the answer.

Pick a tool. Get your answer. Move on.

No setup, no account, no waiting. The whole point is that you're in and out in seconds.

Browse the tools →