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
RockIn Rock & Mineral identify
Discover the world beneath your feet with the ultimate app for rock and mineral enthusiasts
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.4
1,664 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/
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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 RockIn Rock & Mineral identify: map the core Reference 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
Expand database and include user contributions for rare finds.
Assumption to check: Limited identification options for rare rocks
Validate with people who use this workflow before building.
Hypothesis 2
Simplify navigation and enhance UI aesthetics.
Assumption to check: User interface may feel cluttered
Validate with people who use this workflow before building.
Hypothesis 3
Optimize image handling and loading states.
Assumption to check: Inconsistent performance during image loading
Validate with people who use this workflow before building.
Hypothesis 4
Add social features to enable users to share finds and tips.
Assumption to check: Lack of community features for sharing discoveries
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
Discover the world beneath your feet with the ultimate app for rock and mineral enthusiasts. Whether you’re a beginner collector, a passionate geologist, or a marketplace seller, this app brings powerful identification tools, collection management, and community features together in one smart platform. ● Instant Rock & Mineral Identification Simply take a photo and get fast, accurate identification powered by advanced recognition technology. Learn key details about each specimen—type, structure, rarity, origin, hardness, value ranges, and more. Perfect for real-time field exploration or cataloging your home collection. ● Build & Organize Your Personal Collection Create a digital catalog of your rocks and minerals. Add photos, locations, purchase info, personal notes, and rarity levels. Keep your collection structured and beautifully sorted by species, group, class, or custom tags. ● Marketplace for Buying & Selling Join a trusted community marketplace designed for collectors. Buy unique specimens from around the world or list your own items for sale. Set prices, manage offers, and track interest directly in the app. Great for hobbyists, sellers, and professional dealers. ● Discover Global Collections Explore other users’ collections to get inspiration, compare specimens, and learn from fellow collectors. See how rare minerals look in different environments and discover trending finds in the global community. ● Track Value & Rarity Access rarity indicators, price estimates, and popularity data to better understand the market value of your items. ● For Beginners & Experts Whether you’re just starting or managing a large catalog, the app adapts to your experience level with simple tools and expert insights. ● Always With You Use the app outdoors, in museums, at gem shows, or while traveling—your entire collection and identification toolset are always at hand. Unlock a deeper connection with the stones around you. Identify, collect, organize, explore, trade—your entire mineral world in one app. Please note that terms and conditions, as well as our privacy policy, apply. Privacy Policy: https://rockln.gitbook.io/rockln/welcome-to-rockln/privacy-policy Terms of Use: https://rockln.gitbook.io/rockln/welcome-to-rockln/terms-and-conditions-of-use Contact us: [email protected]
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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
Supabase
Zustand
React Navigation
react-native-reanimated
BUILD KIT DIFFICULTY
Expert
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.
