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
My Sketch - Pencil Sketches
My Sketch - The best sketch maker with 11 million users is *FREE* for limited time! Get it today!
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
12,542 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 My Sketch - Pencil Sketches: map the core Photo & Video 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
Offer a wider variety of customizable filters and user-generated filters.
Assumption to check: Limited filter options compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Implement robust error handling and optimize photo processing.
Assumption to check: Occasional crashes during photo import.
Validate with people who use this workflow before building.
Hypothesis 3
Ensure a cohesive design language across all screens.
Assumption to check: Inconsistent user interface in different sections.
Validate with people who use this workflow before building.
Hypothesis 4
Provide a more flexible pricing model with a free tier or trial.
Assumption to check: High subscription price for premium 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
My Sketch - The best sketch maker with 11 million users is *FREE* for limited time! Get it today! Achievements ========================================= Featured by Apple for New and Noteworthy Achieved Top 5 paid iPad Photography Achieved Top 10 paid iPhone Photography Top 10 Photography in more than 15 Countries Features ========================================================= Turn your photos to Beautiful Realistic Sketch Create unlimited sketches High Resolution Photos can be taken directly from Camera or Photo Album Choose 20 different type of Sketches Adjustment of Brightness and Contrast to achieve the best Sketch Results Sharing via Facebook,Twitter, Tumblr,Flickr and E-mail Why are we different from the other Sketch Application? ========================================================= We use complex algorithm to achieve REALISTIC and NEAR PERFECTION Sketch Our Sketch can be saved into High Resolution and suitable for printing Our Sketch retain the original quality of the Photo without destroying or distorting it. Customer's Reviews ========================================= THE best sketch maker in appstore This app is amazing Worth every penny!! Great app, a must to have ! Best Regards, My Sketch Team
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
Supabase
@react-navigation/native
@supabase/supabase-js
react-native-reanimated
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.
