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
Writing AI
A writing AI app brings the magic of artificial intelligence into your writing routine, helping you create better content faster and easily
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.9
7 ratings · Top 5%
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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Combine features and design from your favorite apps.
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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 included19 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 Writing AI: map the core Productivity 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
Allow users to specify styles or tones for AI-generated text
Assumption to check: Limited customization of generated content
Validate with people who use this workflow before building.
Hypothesis 2
Introduce sharing options for team collaboration
Assumption to check: No collaboration features
Validate with people who use this workflow before building.
Hypothesis 3
Offer a one-time purchase option alongside subscriptions
Assumption to check: Subscription fatigue
Validate with people who use this workflow before building.
Hypothesis 4
Implement offline mode for content generation and review
Assumption to check: Lack of offline functionality
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
A writing AI app brings the magic of artificial intelligence into your writing routine, helping you create better content faster and easily. It can suggest improvements to your grammar, help with word choice and even give you creative ideas if you’re stuck. Designed for everyone from students to professionals, AI writing app provide real-time feedback and help streamline everything from emails and essays to blog posts. Imagine having an intelligent assistant that not only corrects mistakes but also understands your unique style, helping you polish and perfect your writing. Ai app restructures sentence and content summarization. App tries to fulfil your needs whether you’re drafting a quick note or composing a detailed report. It offers a smoother, more engaging experience by combining practical writing tools with creative support, so you can focus on your ideas.A writing AI app helps make every word count for clarity and creativity. Creative Need a hand with writing, speeches, or content ideas? Writing AI is here to help! Just ask your question, and our AI assistant will quickly give you clear, well-crafted responses. Endless Knowledge Our AI is full of information on almost any topic. Whether it's a quick fact or an in-depth question, Writing AI is ready to help you discover more. Supports Any Language Communicate with Writing AI in your language of choice! Perfect for language learners or anyone connecting globally, it understands and responds smoothly in multiple languages. Problem-Solving Power Stuck on a tricky question or need advice? Writing AI is ready with ideas and solutions to help you tackle challenges.
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
Axios
React Navigation
React Native Clipboard
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.
