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.
App Overview
VACU Mobile
Download Virginia Credit Union’s online banking app, VACU Mobile App! The VACU Mobile App gives you 24/7 access to your VACU accounts, both personal and business
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.4
3,452 ratings · Top 30%
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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for VACU Mobile: map the core Finance workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Provide support for more financial institutions.
Assumption to check: Limited account linking options
Validate with people who use this workflow before building.
Hypothesis 2
Implement robust error handling and testing.
Assumption to check: Occasional bugs in transaction history display
Validate with people who use this workflow before building.
Hypothesis 3
Introduce customizable spending categories and budgets.
Assumption to check: Lack of personalization features
Validate with people who use this workflow before building.
Hypothesis 4
Implement a cleaner, more organized layout.
Assumption to check: User interface can feel cluttered
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Download Virginia Credit Union’s online banking app, VACU Mobile App! The VACU Mobile App gives you 24/7 access to your VACU accounts, both personal and business. You can check balances, transfer money, make payments, locate branches and ATMs, deposit checks, and more! What you can look forward to in our app: • Consistent features between our website and mobile app, with easy-to-read account snapshots and more menu options at your finger tips. • Enhanced security with two-factor authentication for increased peace of mind. • Transfers made easy. Seamlessly transfer money between your VACU accounts, other financial institutions, and other VACU members. • On-the-go deposits. In the app, effortlessly deposit checks wherever you are. Plus, you’ll have easy access to check images. Learn more about online banking with Virginia Credit Union at vacu.org/olb.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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BUILD KIT DIFFICULTY
Expert
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.
