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
Masters Eye
Masters Eye is a focused reference study app for artists who want to draw and paint with stronger structure, clearer values, and better decision making.
$3.99 · In-app purchases
PRICE
$3.99
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included15 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 Masters Eye: 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
Incorporate advanced editing features like layers and filters.
Assumption to check: Limited editing tools compared to professional software
Validate with people who use this workflow before building.
Hypothesis 2
Add onboarding tutorials and tooltips to guide users.
Assumption to check: Difficult to navigate for new users
Validate with people who use this workflow before building.
Hypothesis 3
Implement cloud storage for projects to enable access across devices.
Assumption to check: No cloud saving options
Validate with people who use this workflow before building.
Hypothesis 4
Create a platform for users to share and collaborate on designs.
Assumption to check: Lack of community features
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
Masters Eye is a focused reference study app for artists who want to draw and paint with stronger structure, clearer values, and better decision making. One-time purchase. No subscription. Import a reference photo and switch through purpose-built Study Modes to simplify what you see: • Values: Group complex references into readable value masses • Squint: Reduce visual noise to see big relationships faster • Pencil: Translate references into practical tonal steps • Notan: Test light/shadow design and composition clarity • Proportions: Check alignment, spacing, and shape relationships • Original: Instantly compare against the untouched reference Built for deliberate practice, not distraction: • Fast mode switching for targeted observation drills • Split and compare workflow for quick visual checks • Save results to your Photos library when you choose Privacy-first by design: • Image processing happens on-device • No accounts required • No ad tracking Whether you’re studying portraits, still life, or landscapes, Master’s Eye helps you simplify references and make better artistic decisions with confidence.
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
TypeScript
Firebase
Zustand
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.
