Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
**NabixSoft Invoice — Invoices & Estimates, Offline**
$3.99 · In-app purchases
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for NabixSoft Invoice Maker: map the core Business workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Assumption to check: Limited customization options for invoices
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No support for recurring invoices
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of payment tracking
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No analytics for invoices sent
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
**NabixSoft Invoice — Invoices & Estimates, Offline** Create unlimited invoices and estimates without an account, a subscription, or an internet connection. Your business data stays on your device. **One-time purchase. Own it for life.** No subscription, no recurring fees, no account required. Pay once and create unlimited invoices and estimates. **UNLIMITED INVOICES & ESTIMATES** • Create unlimited invoices and estimates • Auto-numbered documents so you never duplicate a number • Convert an accepted estimate into an invoice in one tap • Track status: Draft, Sent, Accepted, Rejected, Expired, Void, Paid, Unpaid • Recurring invoices — weekly, monthly, or yearly • Automatic subtotal, tax, and total calculation **16 PROFESSIONAL PDF TEMPLATES** Choose a style that fits your trade — Modern, Contractor, Repair Shop, Consultant, Field Service, Studio, Executive, Retail, Wellness, and more. Your logo, signature, and payment details carry over automatically. **ADD YOUR OWN PAYMENT DETAILS** NabixSoft Invoice doesn't process payments. Add the payment information your customers already use: • E-transfer email address • A payment link you provide • A QR code generated from your link, printed on the invoice • A payment note for cheques, cash, or anything else **CUSTOMERS, CATALOG & EXPENSES** • Save customer details — search, sort, and filter anytime • Generate paid/unpaid customer statements • Build a catalog of products and services, with starter items included • Track expenses by vendor, category, and receipt photo **KNOW YOUR NUMBERS** • Dashboard totals for sales, unpaid, paid, expenses, and net profit • Sales-by-status and expenses-by-category charts • Monthly trend view • Search across invoices, estimates, customers, items, and expenses **OFFLINE-FIRST & PRIVATE** No account, no login, no server. Your business profile, customers, documents, and expenses are stored locally on your device. Export a full backup anytime, including a year-end export, and restore it on a new device. **BUILT IN CANADA** • English and Canadian French interface • Bill in CAD or USD • Set your own tax name and rate **EVERYDAY DETAILS** • Print, share, or email any PDF from the app • Business logo and signature on every document • In-app support and FAQs NabixSoft Invoice is built for tradespeople, freelancers, and small service businesses who want to look professional and get paid — without ongoing fees. Questions? [email protected]
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.