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
Cover Letter Creator+
Cover Letter Creator helps you create a polite and professional English cover letter, and easily understand it in your own language.
$1.99 · In-app purchases
PRICE
$1.99
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 Cover Letter Creator+: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Cover Letter Creator helps you create a polite and professional English cover letter, and easily understand it in your own language. After generating your cover letter, you can instantly send it to your preferred translation app using the system share feature. This allows you to check the meaning in your own language before submitting, without changing the original English text. You don’t need writing skills or knowledge of cover letter etiquette. Simply enter your name, company, job role, and tone, and your cover letter is ready in under one minute. This app is designed for people who apply only once or occasionally and want a safe, simple, and affordable solution. Key Features Professional English cover letter templates Understand content in your own language Multiple job roles and tone styles No free writing or complex settings Instant preview and copy PDF export for submission Works fully offline with no tracking Submit your application with confidence, knowing exactly what your cover letter says.
Written user reviews are not shown here. Check current App Store reviews >
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 a more flexible editing interface for cover letters.
Assumption to check: Templates may not be customizable enough for users
Validate with people who use this workflow before building.
Hypothesis 2
Add sharing functionality via email or social media.
Assumption to check: Limited sharing options for cover letters
Validate with people who use this workflow before building.
Hypothesis 3
Implement a feature for users to collaborate on cover letters.
Assumption to check: No collaboration features
Validate with people who use this workflow before building.
Hypothesis 4
Offer more value in subscription tiers, such as additional templates or personalized coaching.
Assumption to check: High churn rate due to subscription fatigue
Validate with people who use this workflow before building.
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
@react-navigation/native
expo-file-system
react-native-paper
Zustand
BUILD KIT DIFFICULTY
Starter
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.
