HouseholdBudgetOS
A household-finance planner that, when rates or local prices move, automatically tells you how much house you can afford, what your monthly payment would be, and what lifestyle changes would get you there faster.
Middle-income households postponing a home purchase because affordability feels out of reach and the math is overwhelming
- Connected-budget view: pulls your actual income, debts and recurring expenses (with bank-link or manual entry) to compute true buying power at current rates
- 'What would it take?' simulator that shows how a 0.5% rate drop, larger down payment, or paying off one debt changes your monthly payment
- Down-payment tracker with goal milestones, automated micro-savings rules and IRA/HSA optimization tips
- Buyer-readiness score that updates weekly and tells you when you're mortgage-shop-ready (not before)
Mortgage rates at a one-year high after steady increases mean many would-be buyers are stalled waiting it out — they need a plan that updates as rates move, not a one-time worksheet.
Google Trends for 'mortgage loan rates today' is real and sustained at 500+ US searches, and mortgage-info.com confirms a crowded test of 23 calculators serving the same affordability question, but most users default to free tools.Best Mortgage Calculators 2026: We Tested 23 (Free, No Login) ↗Rocket vs Zillow: The battle for 'super app' supremacy ↗
Market is saturated: Bankrate, NerdWallet, Zillow, Realtor.com, SmartAsset, Calculator.net all ship full affordability + payment + amortization tools, and Rocket is actively consolidating Redfin/Zillow into a 'super app' for this exact workflow.Best Mortgage Calculators 2026: We Tested 23 (Free, No Login) ↗Affordability Calculator - How Much House Can I Afford? | Zillow ↗
Standard in this category is 'free, no login, no email, instant results'; revenue comes from lender lead-gen, not subscriptions. Convincing middle-income users to pay a recurring fee for something Zillow hands out free will be very hard.Best Mortgage Calculators 2026: We Tested 23 (Free, No Login) ↗Rocket vs Zillow: The battle for 'super app' supremacy ↗
Home-buying intent is evergreen, but the 'rates are spiking, recalculate now' trigger is cyclical — usage will surge in rate-up cycles and deflate in stable-rate periods, making MRR lumpy.Rocket vs Zillow: The battle for 'super app' supremacy ↗
Calculator core is trivially buildable; live rate data exists via FRED/MBA/lender APIs and the Zillow/Rocket APIs show the plumbing is open, but the 'lifestyle change suggestions' layer needs rule-engine or LLM work and quality local price data is the real moat.Best Mortgage Calculators 2026: We Tested 23 (Free, No Login) ↗