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
Lucida Tracer
Experience the ultimate drawing aid! Lucida Tracer brings the classic camera lucida technique to your fingertips, empowering you to draw accurately from life or reference photos like never before
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 Lucida Tracer: 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
Add more editing tools like stickers and filters.
Assumption to check: Limited video editing features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Optimize video processing and rendering.
Assumption to check: Performance issues with high-resolution videos
Validate with people who use this workflow before building.
Hypothesis 3
Implement easy sharing to social media.
Assumption to check: Lack of social sharing options
Validate with people who use this workflow before building.
Hypothesis 4
Create interactive onboarding to guide new users.
Assumption to check: No user tutorials or onboarding
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
Experience the ultimate drawing aid! Lucida Tracer brings the classic camera lucida technique to your fingertips, empowering you to draw accurately from life or reference photos like never before. You can also record your drawing videos for social media without the overlay image (Record feature is one time in-app purchase). This will give you the power to concentrate on creating amazing drawing videos for your followers. Simply choose an image, and Lucida Tracer overlays it semi-transparently onto your device's live camera feed. Look through your screen at your drawing surface – you'll see both the live view and your reference image combined! This allows for incredibly precise tracing, proportion studies, and perspective work. Key Features for Artists: - Real-Time Image Overlay: Project any image from your library onto your camera view. - Precise Overlay Control: Fine-tune with Opacity, X/Y Position, and Zoom sliders. - Multi-Image Support: Work with up to 4 reference images at once. - Distraction-Free Drawing: The overlay is only visible on screen, it's not recorded in your videos. - High-Quality Video Recording (Unlockable): Record just your drawing surface and hand, creating clean process video, or tutorials. Overlay image is not recorded. (Unlock permanently with a single In-App Purchase). - Advanced Camera Settings: Lock Focus/Exposure for stable video, switch between device cameras, and choose 16:9 or 9:16 aspect ratios. - Digital Scene Pan/Zoom: Use a two-finger gesture to pan and zoom the camera view itself, magnifying details without physically moving your device. - Intuitive Interface: Easy-to-use controls, including a 3-finger tap to hide/show UI elements. Lucida Tracer is perfect for: - Portrait artists seeking likeness. - Students learning perspective and anatomy. - Illustrators needing accurate underdrawings. - Hobbyists wanting to improve their sketching skills. - Bakers Looking to design cookies, and cakes Stop struggling with proportions and start creating with confidence. Download [App Name] and unlock a new level of drawing accuracy!
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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
react-navigation
react-native-video
expo-permissions
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.
