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
Crep Collector
Crep Collector is the rotation tracker built for sneakerheads
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
2 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.
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included14 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 Crep Collector: map the core Lifestyle 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
Add advanced features like sorting, filtering, and detailed analytics.
Assumption to check: Limited features for managing sneaker details.
Validate with people who use this workflow before building.
Hypothesis 2
Implement social features to connect users.
Assumption to check: No community or sharing options.
Validate with people who use this workflow before building.
Hypothesis 3
Offer a free tier with basic features.
Assumption to check: In-app purchase for premium features may deter some users.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize their profiles and collections with themes.
Assumption to check: Limited customization options for user profiles.
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
Crep Collector is the rotation tracker built for sneakerheads. Log what you wear each day, inventory your collection, and see the data behind your kicks. No accounts. No clutter. Just a clean, fast way to keep tabs on your rotation. LOG YOUR DAILY WEAR Tap once to log what's on foot. Snap a photo of a new pair or pick from your collection — your rotation, documented day by day. BUILD YOUR COLLECTION Add your pairs with photos, brand, and colorway. Your whole lineup in one place, sorted by how often you actually wear them. SEE YOUR ROTATION ON A CALENDAR Every wear, mapped to the day. Scroll back through your month and see exactly what you laced up. THE DATA BEHIND YOUR KICKS Most worn. Least worn. Pairs gathering dust. Brand breakdowns. Crep Collector turns your rotation into stats that actually tell you something — like which grails you've been sleeping on. KEEP A WISHLIST Save the pairs you're chasing. When you finally cop them, move them straight into your collection with a tap. SHARE YOUR KICKS OF THE DAY Turn any logged day into a clean, shareable card — drop your fit of the day straight to your story or send it to the group chat. PRIVATE BY DESIGN Everything stays on your device. No account, no login, no tracking. Your collection is yours. Whether you've got three pairs or three hundred, Crep Collector helps you wear them all — and know your rotation like never before.
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
Supabase
Zustand
React Navigation
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.
