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
Ghana PAYE / SSNIT Calculator
Ghana PAYE Calculator calculates your Income Tax based on your Salary and SSNIT Contribution (5.5%) and gives you an accurate representation of what you are to pay
$9.99 · In-app purchases
PRICE
$9.99
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/
Preview a sample Build Kit No email needed
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 Ghana PAYE / SSNIT 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 tooltips and help icons for better understanding.
Assumption to check: Users may find the calculations complicated and prone to errors.
Validate with people who use this workflow before building.
Hypothesis 2
Include budgeting tools and expense tracking.
Assumption to check: Limited features for tracking and managing finances.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to set custom tax rates and deductions.
Assumption to check: Lack of customization options for different income scenarios.
Validate with people who use this workflow before building.
Hypothesis 4
Add notifications for tax deadlines.
Assumption to check: No reminders for tax deadlines or updates.
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
Ghana PAYE Calculator calculates your Income Tax based on your Salary and SSNIT Contribution (5.5%) and gives you an accurate representation of what you are to pay. This part is useful for everybody. The User Interface is neatly designed and easy to use. It is built using the latest Tax Rates from Ghana Revenue Authority ( GRA ). If you are a student or a lecturer, employer or employee or just an ordinary citizen interested in knowing how much your SSNIT Contribution or Income Tax Deduction (PAYE) is calculated and how much you ought to pay, this application will put you in the right direction. Features: 1. Quick Calculations 2. Detailed Calculations 3. Calculates VAT on goods and services (VAT, VAT Reversal, and VAT Flat Rate) 4. Custom Tax schedule (Includes previous tax schedules) 5. Easy to use interface 6. Calculates Net to Gross Salary and Gross to Net 7. Overtime tax, Bonus Tax, Tier 1, Tier2 and Tier 3 (Provident Fund) Calculations 8. Net to Gross Salary Calculation 9. Tourism Levy Calculation
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.
SUGGESTED BUILD STACK
React Native
Expo
Formik
Yup
Axios
React Navigation
BUILD KIT DIFFICULTY
Intermediate
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.
