Finance and accounting decision
constructor
A small web service reproducing the core estimate-generation and PDF export is realistic for one technical person to build and maintain; the app’s App Store polish and mobile-native features are what you’d give up.
View on the App Store↗$34.99/mo
$420/yr
Read off the official pricing page.
$100one-off38 h to build
$30/mo3 h/mo upkeep
On cash alone, building overtakes the subscription at 2 seats.
Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need - the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship. All constructor alternatives, with the arithmetic →
What a replacement has to do
- User enters project scope → AI suggests line items & costs → user edits and applies branding → export PDF and share/store estimate
What it still won’t have
- Polished native iOS UI and App Store distribution
- Built-in mobile-specific features (offline, native sharing integrations)
- Existing user ratings/reviews and brand presence
- Any proprietary training data or internal pricing heuristics the vendor may use
What remains hard
- Product polish and ongoing maintenance
First-year cost
Keep paying
Paying is—cheaper in year one.
On cash alone, building overtakes the subscription at 2 seats.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a minimal web replacement using Next.js (React) frontend, Node/Express backend, PostgreSQL for persistence, and OpenAI-compatible LLM API for cost suggestions. Core features: project input form, prompt templates to produce line items and cost ranges, editable estimate UI, PDF export (server-side HTML→PDF), branding fields (company name/logo), and list/filter of saved estimates. Out of scope: native iOS app, photo-based takeoff, advanced integrations (QuickBooks) and payments. Include error handling for API failures, input validation, authentication (email-only), and unit/integration tests for backend endpoints.
How we checked
How the score was reached
- Build verdict base78
- An open-source build was found+5
- 3 cited sources+3
- Price verified on pricing page+3
- 3/3 assessment runs agreed+4
- Evidence score93
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time - so the same evidence always produces the same number.
How scoring works →Cited sources · 3
Every page the run actually retrieved.
- official productAI Cost Estimates 4 Contractor — App Store
- open sourcemayswind/ezbookkeeping
- open sourceandrewdwallo/erpsaas
Integrity checks
What held up, and what did not.
