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
Wall Crazy
Do you like to visually organize bits of information and the relationships between them? For instance:
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.5
2 ratings · Top 50%
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.
Build your own version
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 Wall Crazy: map the core Graphics & Design 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
Include a larger library of templates and categories.
Assumption to check: Limited template options can make it hard to find desired styles.
Validate with people who use this workflow before building.
Hypothesis 2
Add more detailed editing tools and options.
Assumption to check: Customization features may not be robust enough for advanced users.
Validate with people who use this workflow before building.
Hypothesis 3
Streamline the saving and sharing process with clear indicators.
Assumption to check: Users report difficulty with saving and sharing designs.
Validate with people who use this workflow before building.
Hypothesis 4
Focus on user feedback to make iterative improvements.
Assumption to check: 3.5/5 rating suggests mixed user satisfaction.
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
Do you like to visually organize bits of information and the relationships between them? For instance: • a Crazy Wall as you might see in a movie • a Murder Wall seen on TV • a graphical description of the plot, scenes, characters, and relationships in a piece of literature • a multi-generation geneogram chart Drawing graphical diagrams in Wall Crazy creates a database of information and the relationships between the pieces of information. The pieces of information can be text, photos, maps, or web pages. The relationships are whatever you define them to be. Wall Crazy comes with three pre-defined themes (information holders and relationship templates). More themes are available for free on the web. And, you can edit the predefined themes and/or create your own. Each bit of information or relationship includes • the creator and creation date • the last editor and modification date • a start and end date that the information or relationship encompasses • a title • keywords • associated data, text for relationships, text, photos, maps, web pages, and embedded walls for bits information Walls and themes can be exported, imported, and shared with others. Walls can be up to 71” x 71" (1.8m) and be printed at full size.
Written user reviews are not shown here. Check current App Store reviews >
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
Supabase
React Navigation
Zustand
Expo Image Picker
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.
