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Under the Hood

Built for serious investors.

A fast calculation engine. AI that knows your numbers. Twelve calculators built on the same formulas pros use. Crunchly isn't a spreadsheet. It's a real estate intelligence platform.

crunchly.io/app
Crunchly
REAL ESTATE INTELLIGENCE
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Core Calculators
Cash Flow
Cap Rate & ROI
Cash-on-Cash Return
ROI Calculator
Rental Yield
Mortgage
Strategy
BRRRR
DSCR
Vacancy / Sensitivity
Deal Analyzer
Fix & Flip
Flip vs Rent
All calculations are estimates. Consult a financial advisor before investing.
+
PRO
Rental Cash Flow
Analyze monthly income, expenses, and returns on a rental property
MONTHLY CASH FLOW
+$1,328
Strong positive flow
ANNUAL CASH FLOW
+$15,932
CASH-ON-CASH RETURN
12.26%
CAP RATE
8.94%
Above avg
COST PER UNIT
$156,250
CASH FLOW / UNIT
+$332
Purchase & Financing Paid in Cash
Purchase Price ($)
625,000
Down Payment (%)
20
Interest Rate (%)
7.0
Loan Term (yrs)
30
Closing Costs ($)
5,000
Number of Units
4
Income
Monthly Rent ($)
6,750
Vacancy Rate (%)
5
Monthly Breakdown
Gross Rent$6,750
Vacancy Loss−$338
Effective Rent$6,413
Mortgage (P&I)−$3,327
Tax + Insurance−$0
Repairs + CapEx−$675
Mgmt + Other−$1,083
Net Cash Flow+$1,328
Strong cash flow
The Engine

Numbers move the moment you do.

No Calculate button. No "loading" spinner. Type a purchase price and your cash flow, cap rate, ROI, and cash-on-cash return all update in the same frame.

Every input is bound to a live computation graph. Change one cell — interest rate, down payment, vacancy assumption — and the entire deal recomputes in single-digit milliseconds. Twelve calculator cores, one custom-built engine.

  • Instant recalculation on every keystroke
  • Linked sliders and inputs so you can scrub assumptions like a video
  • Sensitivity analysis baked into every formula
12 AI C Crunchly PROCESSOR ENGINE
Crunchly

Crunchly knows your numbers.

Most AI tools answer in vague paragraphs. Crunch reads the deal you're working on right now and answers in your numbers, not generic ones.

Engine · v2.1
Crunchly AI

Built on Anthropic's Claude — fine-tuned on real estate fundamentals and grounded in the live state of your calculator.

Powered by Claude · made by Anthropic
Context-Aware
30+
RE Metrics
100%
Cited Math
You: Is this deal worth pursuing if rates drop 50 bps?
🐰🥕 Crunch: A 50 bps drop on this $500k loan saves about $164/mo on the mortgage payment. Cash flow goes from +$237 to +$401.
🐰🥕 Crunch: Cap rate is unchanged (rate doesn't affect NOI), but cash-on-cash return jumps from 2.3% to 3.9%. The deal moves from borderline to solid.
The Models

Twelve calculators. One platform.

Each one built on the formulas working investors actually use — not toy versions. Cross-linked so a single deal flows through every analysis.

Deal Analyzer
A–F grade across 8 investor benchmarks. The flagship.
GradeA+
Score96 / 100
VerdictStrong Buy
Cap Rate
NOI ÷ purchase price
NOI$26,400
Cap Rate8.42%
Cash Flow
Monthly net after PITI + opex. The everyday workhorse.
Monthly CF+$1,328
Cap Rate8.94%
CoC Return12.26%
BRRRR
Buy · Rehab · Rent · Refi · Repeat
Cash Out$54,200
Cycle11 mo
Fix & Flip
ARV, holding costs, profit margin
Profit$48,300
Margin21%
The Score

Eight benchmarks. One grade.

Cap rate. Cash-on-cash. DSCR. 1% rule. 50% rule. GRM. Cash flow per unit. Total ROI. Crunchly grades any deal across all eight in seconds — and distills them into a single A through F you can act on.

Every grade comes with the full breakdown so you know exactly why a deal earned a B+ instead of an A. Adjust your assumptions, see the grade move in real time, and find the inputs that turn a maybe into a yes.

  • Industry-standard thresholds, configurable to your market
  • Side-by-side grading when comparing two or more deals
  • Color-coded scorecard so weak spots jump out instantly
Grade Your First Deal
Crunchly Grade
A+
Cap Rate
Cash-on-Cash
DSCR
1% Rule
50% Rule
GRM
CF per Unit
Total ROI

Crunchly isn't just a calculator. It's a real estate intelligence platform.

The Speed

Edge-deployed. Globally fast.

Crunchly runs at the network edge, not from a single data center halfway across the country. Median response time is under 50 milliseconds, anywhere in North America.

Every byte is served from whichever edge node is closest to you. Calculations happen in your browser, so even on a flaky hotel Wi-Fi connection, the math keeps working. And because it's a Progressive Web App, you can install it to your home screen and use it offline.

  • Sub-50ms median response across the U.S.
  • Runs offline as an installable PWA on any device
  • Calculations execute client-side — no round-trip lag
Live response time Faster is better
Recalculate
~8ms
Slider drag
~14ms
Tab switch
~22ms
Save deal
~42ms
Cloud sync
~96ms
100ms · the threshold for "feels instant"
The Privacy

Your numbers stay yours.

Deal data is encrypted in transit and at rest. Crunchly will never sell your information, train AI models on your private deals, or share what you build with third parties. You own your data. You can export it. You can delete it. Always.

Encrypted in transit & at rest
No AI training on your deals
Export & delete anytime

Start crunching.

Free to try. No credit card. Run your first deal in under 60 seconds.

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