Every door. One number.
Value, debt, equity and loan-to-value across the whole portfolio — with equity by state and your return set against the S&P 500.

Door Alpha shows what your rentals are worth, what you truly own, and what you’d keep after tax — on one calm screen.
Launching on iPhone, iPad and Android. Free for your first property.The app’s built-in sample portfolio: six rentals across six states.
Depreciation recapture, capital gains, the net investment income tax and your state all take their share. Door Alpha puts every one of them on the screen before you list.
















Captured from the app with its sample portfolio. Change the theme and the whole wall changes with it.
Value, debt, equity and loan-to-value across the whole portfolio — with equity by state and your return set against the S&P 500.

Every home with its own street-level photo, cash flow, cap rate, debt coverage and a health score you can read at a glance.

Rent, operating costs and debt service, month by month and property by property — so a quiet leak never hides inside a total.

An adjustable rate about to reset. A property running short. A 1031 deadline closing in. You hear about it first.

Choose a property and a price. Door Alpha works through selling costs, the mortgage, depreciation recapture and capital gains at your own tax brackets, the 3.8% net investment income tax if it applies, and your state — and shows what is left.
Forty-five days to name a replacement property. One hundred and eighty to close. Door Alpha counts both down from your sale date, tracks every step and shows the tax you’d defer.
Example clocks from the sample portfolio’s exchange.
Depreciation, mortgage interest and other deductions shelter your rent. Door Alpha shows the gap between what lands in your account and what the IRS sees, property by property.

Every view opens out — the portfolio beside the detail, the map beside the numbers, the whole year of cash flow at once.




Folded, it’s the phone layout you know. Open it and Door Alpha becomes a desk: sidebar, charts and every property at once.






Obsidian is quiet and warm. Daylight is fresh and green. Each comes dark and light — pick one and every screen on this page changes with it.
Drag across the screen to see dark and light side by side.
Built for the investor with six doors in three states and one accountant — in your own name, in LLCs or in trust — who wants the numbers that matter without the spreadsheet.
Every plan has every feature — plans differ only by how many properties you track. Prices in USD, billed through the App Store or Google Play; cancel any time.
Pre-registerDoor Alpha provides estimates for planning; it is not tax, legal or investment advice. Figures on this page come from the app’s built-in sample portfolio. Privacy policy.
Door Alpha is in final testing for iPhone, iPad and Android. Leave your email and we’ll tell you the day it’s live — one email, nothing else.