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
RC Details
RC Details is an essential tool for engineers and students in order to facilitate the practical use of Reinforcement Concrete Details given in Eurocode 2, Part 1 .
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 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.
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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 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 RC Details: 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
Increase content variety and sources for broader appeal
Assumption to check: Limited content library compared to larger platforms
Validate with people who use this workflow before building.
Hypothesis 2
Integrate sharing options for users to share their favorite devices
Assumption to check: Lack of social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to submit reviews or ratings for devices
Assumption to check: No user-generated content
Validate with people who use this workflow before building.
Hypothesis 4
Regular updates and improved customer support for enhanced user satisfaction
Assumption to check: Inconsistent updates and support
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
RC Details is an essential tool for engineers and students in order to facilitate the practical use of Reinforcement Concrete Details given in Eurocode 2, Part 1 . In this first version are included: General provision for detailing ⋅ Spacing of bars; EN 1992-1-1, § 8.1 ⋅ Permissible mandrel diameters for bent bars; EN 1992-1-1, § 8.3 Anchorage of longitudinal reinforcement EN 1992-1-1, § 8.4 ⋅ Ultimate bond stress; EN 1992-1-1, § 8.4.2 ⋅ Basic anchorage length; EN 1992-1-1, § 8.4.3 ⋅ Design anchorage length; EN 1992-1-1, § 8.4.4 Anchorage of links and shear reinforcement; EN 1992-1-1, § 8.5 Laps; EN 1992-1-1, § 8.7 ⋅ Lap length; EN 1992-1-1, § 8.7.3 ⋅ 8.7.4 Transverse reinforcement in the lap zone; EN 1992-1-1, § 8.7.4 Detailing of members and particular rules ⋅Beams; EN 1992-1-1, § 9.2 ⋅Slabs; are comming soon ⋅Columns; are comming soon All things are in both language English and Albanian.
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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
Zustand
Firebase
React Navigation
Axios
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.
