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
Juno Child Support Calculator
The most accurate child support calculator for 13 states — built for family law attorneys,
$7.99 · In-app purchases
PRICE
$7.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included15 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 Juno Child Support Calculator: 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 detailed explanations of each calculation step.
Assumption to check: Complex calculations can be confusing for users.
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to input additional factors affecting child support.
Assumption to check: Lack of customization for different scenarios.
Validate with people who use this workflow before building.
Hypothesis 3
Implement loading indicators and success messages.
Assumption to check: Minimal visual feedback or animations during calculations.
Validate with people who use this workflow before building.
Hypothesis 4
Add functionality to save or export calculation results for sharing.
Assumption to check: No option to save or export calculations.
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
The most accurate child support calculator for 13 states — built for family law attorneys, self-represented parents, mediators, and legal aid organizations. Enter income, custody details, and expenses, and get results in seconds with official court-ready PDF forms. SUPPORTED STATES Alabama, California, Florida, Georgia, Illinois, Michigan, Montana, Nevada, New Jersey, North Carolina, Ohio, Pennsylvania, and Texas — each following that state's official child support guidelines. ACCURATE, OFFICIAL CALCULATIONS - Primary, shared, and split custody calculations - State-specific adjustments (Ohio income shares, Texas percentage of income, Michigan FOC formula, and more) - Verified against official state calculators - Updated with the latest guideline schedules GENERATE COURT-READY PDF FORMS Export official fillable forms for your state — Ohio JFS-07768, California FL-350, Alabama CS-42, Michigan FOC 10, and more. Fill in your details, generate the PDF, and share directly with your attorney, mediator, or the court. WHO IT'S FOR - Family law attorneys preparing client estimates - Self-represented parents navigating custody agreements - Mediators and arbitrators facilitating settlements - Legal aid organizations and child support enforcement agencies - Anyone who needs a quick, reliable child support calculation PREMIUM FEATURES - Unlimited Calculations — run as many scenarios as you need - Official PDF Forms — generate and share court-ready documents - Save & Compare — store calculations and compare different arrangements - All 13 States — switch between states from Settings TRY FREE FOR 7 DAYS Download and start calculating immediately. Upgrade to Premium for unlimited calculations, PDF export, and full access to all states. SUBSCRIPTION DETAILS Premium: $7.99/month with 7-day free trial - Cancel anytime in App Store settings - Subscription automatically renews unless cancelled 24 hours before period ends - Payment charged to iTunes Account at confirmation of purchase PRIVACY & SECURITY Your financial data stays on your device. We never share or sell your information. Terms of Use: https://childsupportcalc.junotech.app/terms Privacy Policy: https://childsupportcalc.junotech.app/privacy
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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.
SUGGESTED BUILD STACK
React Navigation
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Expo
Zustand
BUILD KIT DIFFICULTY
Advanced
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.
