Profit & Loss
The whole portfolio over any period.
Portfolio financeOne dashboard for
One dashboard for
every app you own.
Stack Fluid is portfolio finance for app owners. See revenue, costs, and margin for each product and for the whole business at once — and export a Schedule C-ready package at tax time.
Sign in with GoogleFree while in early access
Revenue$10,850
Costs$4,670
Net$6,180
AppRevenueNetMargin
CRCash RunwayGrow$8,240$6,33077%
HDHabit DeckMaintain$2,180$54025%
SLSplit LedgerKill?$430−$690-160%
Stripe shows revenue. Your bank shows a balance. Neither one tells you how a single app is doing.
Owning a portfolio means the business is really several businesses sharing one bank account. Payouts arrive in a lump, infrastructure bills cover everything at once, and the app quietly losing money every month looks exactly like the one paying for the others. Stack Fluid gives each app its own set of numbers, and the portfolio a single view.
How it works
- 01
Add the apps you own
List every product in the portfolio, plus a company-level bucket for costs that belong to the business rather than any one app.
- 02
Bring in the money
Import a CSV from your bank or Stripe, or add transactions by hand. Each one gets a category and an app.
- 03
Watch the portfolio
Revenue, costs, and margin update per app and across the whole business, so you always know where you stand.
Attribution
Shared costs stop hiding in the total
A per-app margin is only as honest as the costs behind it. Split a shared bill across apps by percentage and each one picks up only its share. Turn that into a rule and later charges from the same merchant follow it on their own — retroactively too, if you want the back catalogue fixed.
AWAmazon Web ServicesMonthly infrastructure−$412.80
- CR
- HD
- SL
Tax time
Categories that already know their tax line
The built-in categories come mapped to Schedule C lines. The Schedule C Summary report totals what you already categorized, so April is a read of work you have done rather than a rebuild of it.
Five of the built-in categoriesActual mappings
Your categorySchedule C
Payment processing feesLine 10Commissions and fees
Web hosting & infrastructureLine 27aOther expenses — Web hosting
Contract labor & freelancersLine 11Contract labor
Advertising & marketingLine 8Advertising
Software subscriptionsLine 27aOther expenses — Software
Reports
P&L by App
Every app side by side, after attribution.
Expenses by Category
Where the money actually went.
Net Cash Flow
What came in against what went out.
Schedule C Summary
Totalled by tax line, ready to file.
Also in the app
Merchant rules
Match on merchant, description or amount; set app, split, category or tags.
CSV import
Bring history in from your bank or Stripe, reviewed before it lands.
Recurring services
Vendor subscriptions with cadence, price history, and renewal dates.
Company-level costs
A bucket for spend that belongs to the business, not one app.
Tags
Cut the ledger any way your categories don't.
Full export
Every transaction and category, out of Settings, any time.
What’s next
Everything above this line works today. This does not yet — it is what we are building next.
Category suggestionsSoon
A first guess at the category for anything still unfiled.
Where your data sits
No bank connection
Stack Fluid never asks for bank credentials and holds no link to your accounts. You bring the numbers in by CSV or by hand.
Private to your workspace
Your books are visible only to your workspace. There is no public profile, no shared feed, and nothing is sold to anyone.
Yours to take
Export everything from Settings whenever you want, or ask us to delete the account outright. Read the privacy policy.
Questions
How many apps does this make sense for?
Two or more. With one app your books already are the business. The moment there is a second, revenue and costs stop lining up with products and a portfolio view starts paying for itself.
Does it connect to my bank?
No. You import a CSV or enter transactions yourself. Stack Fluid never asks for bank credentials, never holds a connection to your accounts, and never sees your banking login.
What if a cost is not for any one app?
Put it in the company-level bucket. It stays in your books and on your Schedule C, but it does not distort any single app's margin.
Is this an accountant?
No. It organizes your numbers and maps them to Schedule C lines. You or your accountant review the result and file it.
Can I get my data out?
Yes, any time, from Settings. Full export of your transactions and categories, no request required.
See the whole portfolio
Sign in with Google, add the apps you own, and find out which ones are actually paying for themselves.
Sign in with GoogleFree while in early access. Export or delete your data at any time.