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Application design + Engineering

The exact next step

Knowing you have a retirement shortfall is useless without knowing how to fix it. We engineered a web app that reverse-engineers the exact monthly investment needed.

ClientCFOmum
SectorFinancial Education
ScopeUI Design
Architecture
Build
Integration
The Big Number homepage, built for CFOmum, with the headline One Big Number

Standard financial tools are great at delivering bad news. They tell you you're going to run out of money in retirement, hand you a terrifying shortfall figure, and then leave you completely alone to figure out what to do about it.

We took a completely different path. The Big Number app doesn't just calculate where you're heading. If you're falling short, the system works backwards to tell you the precise dollar amount you need to invest each month to close the gap.

The problem

The dead end diagnosis

CFOmum provides straightforward financial education for Australians wanting to build wealth. They help everyday people understand their money, navigate their superannuation, and set realistic goals for a comfortable retirement without relying on expensive planners.

Most calculators stop at the shortfall. They identify the exact size of the gap but offer zero guidance on how to bridge it.

Knowing you are half a million dollars short is terrifying. Without an action plan, that fear turns into pure inaction.

Our solution

Reverse engineering the fix

A user finishes the assessment and learns they are on track to meet their target. Instead of a dead end, the app provides a clear breakdown of their financial position and reinforces their current strategy to stay on track.

The VerdictBig Number result card showing projected future wealth and an on track message

Clear Instructions

The final screen offers total clarity. If a user is falling behind, they get a single, actionable monthly figure they can set up as an automatic transfer right away.

The FormulaThe Big Number model: income, tax logic, superannuation, budgeting, net worth, investment, legacy and review

Working Backwards

The codebase runs the entire projection in reverse. It takes the shortfall and calculates the required monthly investment, accounting for real returns until age 67.

Project portfolio
Big Number homepage on mobile
A client testimonial from the Big Number site
The four step assessment on mobile
The Big Number model on mobile
Reviews section with a 4.9 rating
Financial disclaimer shown before the assessment starts
Next steps

Turn data into direction

Stop leaving your users at a dead end. Book a call to discuss how we can build actionable tools for your audience.

Someone checking their Big Number on their phone