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
Modyfy: AI Car Designer
Modyfy – Your AI Car Designer! Try fast AI car transformations
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.4
1,238 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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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 included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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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 Modyfy: AI Car Designer: 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
Offer more car parts and customization features.
Assumption to check: Limited customization options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Optimize 3D models for better performance.
Assumption to check: Performance issues with 3D rendering on older devices
Validate with people who use this workflow before building.
Hypothesis 3
Implement easier sharing options for social media.
Assumption to check: Difficulties in sharing designs
Validate with people who use this workflow before building.
Hypothesis 4
Simplify onboarding and provide tutorials.
Assumption to check: User interface can be overwhelming 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
Modyfy – Your AI Car Designer! Try fast AI car transformations. Whether you want a new car design, a custom car look, or a complete car modification, Modyfy makes it simple. Car Customizer: With Modyfy, explore different looks before making a real change. Use our ai car customizer tools and car build effects to see your dream style. AI Car Designer & Car Maker! Want to know which car modification suits your ride best? Modyfy lets you try on bold new looks with the ai car designer. Try bold or sleek car design looks, rims and paint jobs. The ai car maker tool helps you find perfect shades for paint, wraps, and rims. Switch between car build styles and see what suits you best. Explore endless customize cars options with just one tap! Try our new AI Car Modifications! Curious how you’d look with a widebody kit or a spoiler? The ai car modifications add realistic parts to your vehicle. Test different car designer options and trims to see what matches your style best with the ultimate car builder. AI Car Designer in Real Time: Snap a photo of your ride and use Modyfy to build your own car options. Our ai car designer makes each car modification look realistic. Try Different AI Car Filters: Whether you want a bold car modification, a small car design change, or a fun customize cars effect, Modyfy helps you try on different styles with ease. No matter your vehicle type, Modyfy helps you find the perfect car build. Try on different ai car designer options and use the car customizer to see what works best for you. Realistic Car Builder Experience: See how a new car design looks with Modyfy. With the car maker, you can try on multiple ai car modifications fast. Start trying to customize cars with Modyfy now! From classic tuners to luxury looks, Modyfy lets you explore lots of variety of colors and styles easily with the car builder. Explore and try on a car modification tailored to your vehicle's lines. Modyfy uses ai to ensure a simple and natural look each time. See how new car design fits your ride before making a real change. Test shades with our car maker. Create your dream car Modyfy, the best tool for virtual car modifications and to build your own car with the ai car designer! Discover all our fun ai car features in Modyfy! Wondering how to customize cars or which car design parts you need? You can find out now. Try Modyfy Today! Use the car builder, try a new car modification, and get your ai car designer results fast. Download now and build your own car! Get Pro now and subscribe to enjoy unlimited modifications! [email protected] https://www.papcorns.dev/terms https://www.papcorns.dev/privacy
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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
zustand
expo-three
react-navigation
BUILD KIT DIFFICULTY
Advanced
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.
