Any formula. A working calculator.
Describe the calculation you need and OneAI builds an interactive tool. No spreadsheet formulas, no dev time. Publish to a permanent URL in seconds.
What You Can Build
Every business has formulas that need a front end
The kind of tools that normally take a developer a week to build — or live forever as a shared spreadsheet no one wants to break.
Unit economics model
CAC, LTV, payback period
Pricing calculator
Margins, tiers, discounts
ROI calculator
Investment vs return over time
Capacity planner
Headcount, hours, output
Break-even analysis
Fixed costs, variable costs, volume
Commission calculator
Base, rate, accelerators
Project cost estimator
Rates, hours, contingency
SaaS metrics model
MRR, churn, expansion revenue
How It Works
Plain language in. Working calculator out.
Open OneAI and say: "Build me a unit economics calculator with inputs for CAC, monthly churn rate, and average monthly revenue. Show LTV, LTV:CAC ratio, and payback period." OneAI generates it. Preview it. Publish it.
Unit Economics
sparks.waymakerone.com/acme/unit-econLTV
$5,000
LTV:CAC
5.9x
Payback
7.1 mo
Features
Replace the shared spreadsheet
Calculators that look like real products, not formulas someone might accidentally break.
Describe the Formula
Explain the calculation in plain language. OneAI builds the inputs, formula logic, and output display.
Interactive Inputs
Sliders, number fields, dropdowns. Users adjust values and see results update instantly.
Permanent URL
Every calculator lives at a stable URL. Update the logic without changing the link.
Share Without Login
Send a guest link to a client or prospect. They use the calculator — no account required.
Edit with OneAI
Open any Spark and describe the change. "Add a gross margin input" or "show the result as a chart."
Version History
Every update keeps a previous version. Label releases — "added accelerator tiers", "fixed margin formula."
Every formula deserves a real interface
Stop sending spreadsheets. Build a calculator, publish it to a link, and send that instead. Takes five minutes.