Own with certainty.

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.
Net worth$997,000
Monthly cash flow+$510
If you sold today, you’d keep$120,428

The app’s built-in sample portfolio: six rentals across six states.

Theme

Equity is not what you walk away with.

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.

Real screens, nothing mocked up

Every number, one screen after another.

Dashboard
Properties
Sale planner
1031 readiness
State tax map
Cash vs taxable
Mortgages
Income and expenses
Reports and CPA pack
Tax basis ledger
Depreciation
Insurance and tax shock
Liability shield
Ownership optimizer
Property detail
Alerts

Captured from the app with its sample portfolio. Change the theme and the whole wall changes with it.

Net worth

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.

Dashboard with net worth, cash flow and equity by market
Properties

Each one, in full.

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

Property cards with street-level photos and cash flow
Cash flow

Where the rent goes.

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

Income and expenses with monthly ledger
Alerts

Problems, before they cost you.

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

Alerts for a rate reset, negative cash flow and a 1031 deadline
Sale planner

Know what you’d keep.

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.

$425,000 sold. $120,428 kept, after $29,072 of tax at a married couple’s 2026 brackets. Raise the price and every line recalculates.
1031 readiness

The 1031 clock, counted for you.

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.

23days left
To identify of 45 days
158days left
To complete of 180 days

Example clocks from the sample portfolio’s exchange.

Cash vs taxable

Why $6,120 of cash can be just $190 of taxable income.

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.

After-tax wealth gain, this year
$105,997
Depreciation shield
$66,745
Taxable income
$190
Equity growth
$99,926
Estimated tax
$49
Cash versus taxable income: $6,120 a year of cash flow, $190 taxable, $66,745 depreciation shield
On iPad

Built for the bigger screen.

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

State tax map across the portfolio’s six states
State tax, mappedWhere each property’s gains are taxed hardest.
1031 readiness on iPad with timeline, replacement targets and checklist
1031, step by stepDeadlines, targets and the checklist together.
Insurance and tax shock stress test
Stress-testedInsurance, tax and HOA rises against cash flow.
Liability shield showing equity protected in LLCs and personally exposed
ProtectedHow much equity sits outside an LLC or trust.
Phone, tablet, foldable

Made for the fold.

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

Door Alpha on an open wide foldable: sidebar, net worth, charts and properties
Door Alpha’s phone layout on the foldable’s cover screen
Door Alpha on an open book-style foldable: sidebar, net worth, charts and properties
Door Alpha’s phone layout on the foldable’s cover screen
Your app, your light

Four themes. You choose.

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.

Theme
Sale planner in the light theme Sale planner in the dark theme

Drag across the screen to see dark and light side by side.

And quietly, everything else

The whole job, in one place.

Sale plannerFour exits compared: sell now, 1031 exchange, installment sale, or hold.
1031 deadline guardian45 and 180 days counted from your sale date, identification rules checked, boot flagged.
Depreciation & cost seg27.5-year schedules, plus what a cost-segregation study could unlock — and add back at sale.
Cash vs taxableHow depreciation and interest shelter your rental income.
State tax mapAll 50 states and DC, with each state’s own rules on gains.
Ownership optimizerIndividual, joint, LLC or trust — compared on protection, not promises.
Liability shieldEquity exposed to lawsuits, and a plan to protect it.
Insurance & renewalsCash flow stress-tested, and a reminder before every policy renews.
MortgagesEvery loan, rate and payment — with warning before a rate resets.
Passive losses & statesLosses you can use this year, losses carried forward, and where you’ll file.
CPA packOne PDF: Schedule E, depreciation, passive losses, your sale and any 1031 — estimates marked.

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.

Pricing at launch

Start free. Grow into it.

FreeOne property, every feature$0No subscription needed
StarterUp to 2 properties$1.99/ moor $19.99 a year
StandardUp to 5 properties$4.99/ moor $49.99 a year
ProUnlimited properties$9.99/ moor $99.99 a year

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.

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  • Delete any time

Door 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.

Launching soon

Be first through the door.

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.

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We use your email only to tell you Door Alpha has launched, then delete it. See the privacy policy.

Coming soon toApp StoreComing soon toGoogle Play