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
Minifig Scan
This is a fan application, LEGO® and the LEGO® logo are trademarks of the LEGO® Group, which does not sponsor, authorize or endorse this app.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
2,804 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 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 Minifig Scan: map the core Utilities 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
Implement advanced image processing algorithms to improve accuracy.
Assumption to check: Limited scanning accuracy with certain figures
Validate with people who use this workflow before building.
Hypothesis 2
Optimize image loading with lazy loading techniques.
Assumption to check: Slow loading times for larger galleries
Validate with people who use this workflow before building.
Hypothesis 3
Create an easy share feature for users to share details directly.
Assumption to check: Difficulty sharing information about minifigures
Validate with people who use this workflow before building.
Hypothesis 4
Enable local storage for previously scanned figures for offline access.
Assumption to check: No offline access to previously scanned data
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
This is a fan application, LEGO® and the LEGO® logo are trademarks of the LEGO® Group, which does not sponsor, authorize or endorse this app. With the introduction of the LEGO® Minifigures Series 25, it is now possible to identify which minifigure is inside the box by scanning the data code on the bottom of the box. LEGO® has not yet confirmed this, so it may not work all the time, but many users have reported that the data codes match the minifigs correctly. This app allows you to quickly scan these data codes and reveal which minifigure should be in the box. The app may provide links to purchase products online in case you have difficulty finding them in stores. Some of these links may be affiliate links. Using these links allows the app to earn a small commission on qualified purchases at no additional cost to you.
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
Zustand
Axios
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.
