Why use Case-Shiller instead of Zillow's Zestimate?

Zestimate is calibrated for individual sale decisions and fluctuates based on neighborhood listing activity. Case-Shiller is a repeat-sales index — it tracks the same homes' actual sale prices over time — making it more reliable for multi-year portfolio tracking.

Which US metros are covered?

All 20 Case-Shiller metros are individually tracked. For properties outside those metros, WealthMap uses the FHFA state-level HPI or the Case-Shiller National HPI as a fallback.

Yes — FRED data is provided free by the Federal Reserve Bank of St. Louis. WealthMap pulls it on-device, so you're not paying us a markup for the data.

Can I track multiple US properties?

Yes. Each property can be assigned its own metro for accurate per-property tracking. The dashboard rolls all properties up into a single net worth number.

Property Tracker App for the US (2026)

Zillow's Zestimate is great for selling. For tracking the value of a property you already own, the gold standard is the S&P CoreLogic Case-Shiller Home Price Index — distributed via FRED. WealthMap is the only iOS app that tracks your property against it automatically.

Feature	WealthMap	Zillow app	Redfin app
Track property vs Case-Shiller / FRED HPI	✓	—	—
Multi-metro portfolio	✓	—	—
Combined with stocks, crypto, pensions	✓	—	—
Privacy-first (no account required)	✓	—	—
Available outside US	✓	Partial	—
Lifetime pricing	€69.99	free + listings revenue	free + listings revenue

Why Case-Shiller / FRED instead of Zestimate

The S&P CoreLogic Case-Shiller Home Price Indices are the most-cited measure of US house prices. They're constructed from repeat-sales data — tracking the same property's value across multiple sales — which avoids the bias of comparing different houses.

FRED (Federal Reserve Economic Data) distributes the Case-Shiller series for the National index plus 20 individual metros: Atlanta, Boston, Charlotte, Chicago, Cleveland, Dallas, Denver, Detroit, Las Vegas, Los Angeles, Miami, Minneapolis, New York, Phoenix, Portland, San Diego, San Francisco, Seattle, Tampa, Washington DC.

Zestimate is an algorithmic valuation designed for individual sale pricing. It fluctuates based on listing activity in your neighborhood, isn't designed for multi-year tracking, and is calibrated to sale decisions — not portfolio tracking.

How WealthMap tracks US property

Enter your US property: city/metro, purchase date, purchase price. WealthMap applies the Case-Shiller change for your metro (or the National HPI if you're in a smaller market) since your purchase date.

Example: bought a house in Phoenix in March 2019 for $385,000. The Phoenix Case-Shiller index rose roughly 73% through January 2026. WealthMap shows your current value as $666,000 with a +73% gain — and a chart of how it tracked vs the Phoenix index every month.

Data is pulled from FRED on-device. No subscription. No Zillow API key. No third-party server sees your property data.

Outside the 20 metros

If your property is in a smaller market not covered by a Case-Shiller metro index, WealthMap falls back to the FHFA House Price Index (state-level) or the Case-Shiller National HPI. You get the best available proxy automatically.

Why pay for a privacy-first tracker

Zillow and Redfin are free because their business is real estate transactions. Your property data feeds their lead generation. WealthMap is paid (€5.99/month or €69.99 lifetime) because the product is the tracker itself — no listings revenue, no agent referrals, no advertising.

Property tracker app for the US — track against the Case-Shiller index