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
RectLabel Pro
RectLabel is an offline image annotation tool for object detection and segmentation.
$19.99 · In-app purchases
PRICE
$19.99
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 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 RectLabel Pro: map the core Developer Tools 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
Provide a guided tutorial during first app launch.
Assumption to check: Steep learning curve for new users.
Validate with people who use this workflow before building.
Hypothesis 2
Offer multiple formats for data export.
Assumption to check: Limited export options for labeled data.
Validate with people who use this workflow before building.
Hypothesis 3
Enable sharing projects with other users.
Assumption to check: No collaboration features for teams.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify interface with clearer labeling and tooltips.
Assumption to check: Potentially confusing UI for annotation tools.
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
RectLabel is an offline image annotation tool for object detection and segmentation. Key features: Label polygons and pixels using Segment Anything Model 2 Label polygons and pixels using Cellpose model Label bounding boxes using Tracking model Automatic labeling using Core ML models Automatic text recognition for lines and words Label cubic bezier curves, line segments, and points Label oriented bounding boxes in aerial images Label keypoints with a skeleton Label pixels with brushes and superpixels Settings for objects, attributes, hotkeys, and labeling fast Search object, attribute, image names, and memo in a gallery view Export to YOLO, COCO, CreateML, and DOTA formats Export indexed color mask image and grayscale mask images Video to image frames, augment images, etc. How to use https://rectlabel.com/help Privacy policy https://rectlabel.com/privacy Terms of Use https://rectlabel.com/terms The standard RectLabel offers subscription plans, $2,99/month and $9.99/year. RectLabel Pro offers a one-time payment plan, $19.99/one-time. Both apps can use all features.
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
@react-native-async-storage/async-storage
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.
