Play
33 tools in 9 groups · most ask you to predict before they reveal · nothing is stored or sent
A calculator that just answers teaches nothing; the number leaves your head by dinner. Most of these make you predict first, then show you the machinery, because the gap between your guess and the truth is where learning happens. The exceptions earn it: a tool for a month when the money will not stretch should not make you play a quiz first, and the youngest children's tools teach by moving things with their hands. Each one teaches one concept and carries one anchor in Scripture.
Time, and what it does to money
The four that change how you read every other number on this site.
- The Third Servant Compounder
Compound growth, and what fear of investing quietly costs.
- Inflation Time Machine
Why money buried in the ground quietly shrinks.
- Opportunity Cost Machine
Every purchase has three price tags: dollars, hours of your life, and its invested future value.
- Interest-Rate Seesaw
One rate, two faces: move the lever and watch savers and borrowers trade places.
Earning a living
Where the money comes from, and what raises it.
- Paycheck Anatomy
Dissect gross pay into taxes, FICA, 401(k), and giving. See the employer match appear for free.
- Skill Compounding
A raise compounds on every future year of income; an investment compounds only on what you set aside.
- Negotiation Dojo
A six-round salary conversation where preparation pays, silence works, and bluffing costs you.
- Education ROI Explorer
Degree vs. trade, year by year for twenty years, with the crossover marked and the sliders that flip it.
- Lemonade Stand
Run a real little business: buy supplies, set your price, meet the weather, and learn what profit actually is.
The month you actually have
Margin, the leak, and the month the money will not stretch.
- Budget Sandbox
Margin: a plan that survives the month life actually throws at you.
- Needs vs. Wants Sorter
Rapid-fire card sort with honest gray areas; family mode lets parents and kids compare answers.
- Lifestyle Creep
Choose what share of each raise becomes new spending, and watch one career end three different ways.
- Bill Triage
When there is not enough for everything: pay by consequence of non-payment, not by who is calling.
- Emergency Fund Stress-Tester
A hundred parallel yous face a year of surprises. Watch how many fall into debt at each savings level.
- The Ant's Store
Store a little each week of summer, then see whether winter is covered.
Debt, and the purchases that create it
Two honest ways out, the purchases that create the debt, and the signature that makes someone else's debt yours.
- Snowball vs. Avalanche
Two honest ways out of debt: the motivating order and the mathematical order.
- Debt Spiral Visualizer
Minimum payments are compound interest pointed at you. Drag the payment up and unwind the spiral.
- Mortgage Accelerator
Extra principal: years shaved, interest saved, and the honest comparison against investing the same dollars.
- Car True-Cost Iceberg
The sticker floats; depreciation, interest, insurance, and fuel lurk beneath. Compare used, new, and lease.
- Rent vs. Buy
The honest version: sliders for both paths, a break-even year, and no pretending one answer fits everyone.
- The Surety Trap
If the person you cosign for cannot pay, the whole balance is yours. The chance is your own estimate.
Investing, and the long run
Not one future, a range of them, on real market history.
- The Long Game
Twenty real market years, one choice each: stay in or sit out. The tortoise runs beside you on actual S&P history.
- Retirement Range Simulator
Not one future: a range of them. See how savings, spending, and time move your odds across history.
Giving, and knowing when it is enough
What proportional giving adds up to, and where more stops meaning anything.
- Giving Impact Visualizer
What proportional, first-fruits giving adds up to over a working life.
- Rich Fool Barn Builder
When does more stop meaning anything? Hoarding, enough, and time.
Not being taken
The three arithmetics a scheme, a betting app, and a scam message cannot survive.
- Scam Spotter
Ten messages, four tells: urgency, authority, strange payment, secrecy. Train your eye before the wolves test it.
- Return Reality Check
Extend the return someone promised you to its arithmetic conclusion, then work the six questions a scheme cannot survive.
- Expected Value Machine
The house margin is not what happens if it goes badly. It is the average outcome, arriving on schedule.
If the income stopped
The ones nobody does until someone makes them, and each takes an afternoon.
- Insurance Gap Check
How big the hole would be if the income stopped: replacement, debts, and education, less what already exists.
- The Risk Pool
A small certain premium instead of one large uncertain loss. The chance is yours to set.
- Estate Readiness Check
Twelve items that decide whether your death is a season of grief or a season of grief plus a mess.
For the youngest, with a grown-up beside them
Ages 4 to 7. Hands on the screen, one idea each, no reading required.
- Three Jars
Ten coins, three jars: give, save, spend. Every coin goes somewhere, and you decide which.
- Seed Growth
One seed doubles every year, unless you dig it up. The interaction is the lesson.