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
Graff Builder
Graff Builder is the first and only app based on creating graffiti art in a real-world process and setting
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.2
11 ratings · Top 30%
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 included17 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 Graff Builder: map the core Entertainment 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
Offer a wider variety of brushes, colors, and textures.
Assumption to check: Limited drawing tools and options
Validate with people who use this workflow before building.
Hypothesis 2
Integrate sharing options to social media platforms.
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Provide more value in the free version or offer more features in the paid version.
Assumption to check: In-app purchase limitations
Validate with people who use this workflow before building.
Hypothesis 4
Implement a guided tutorial for first-time users.
Assumption to check: User interface can be confusing for new users
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
Graff Builder is the first and only app based on creating graffiti art in a real-world process and setting. The user of the app is supplied with over 40 paintable surfaces of every type, and aided by alphabets from world famous graffiti artists. The 1.0 artist list includes Ewok MSK, Amuse 126, Roachi, River, Omens, Sabot, Meloh, Hamer, Sobekcis, Utah&Ether and many more great graffiti writers. Using their letter structures as a basis, from there the creative possibilities are endless, with over 100 effects and functions available to be used easily and readily. Creating high-quality and uniquely original graffiti art has never been this seamless, enjoyable, or unlimited in possibility. It is the perfect creative tool graffiti writers and fans of the art form. The 1.0 artists who have graffiti art fonts in Graff Builder are:Amuse 126 DE Ewok MSK HM Hamer Lucks YUMAD Mek FUA SM FX ATT Meloh LTK Merlot Naks SDK Omens MSK Villyz River TCI Roachi TGS Sabot Sobekcis HM Taste FUA ATT Utah & Ether Yaksap OFB WIL Our artist list will be continually expanding with more graffiti artists soon. Updates, improvements, and new introductions will be constant as well.
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
Firebase
react-navigation
@react-native-community/art
redux
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.
