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
BingBang: Daily Art & Coloring
Open a hand-drawn card each day, find a few encouraging words, and make the artwork your own with coloring and tracing
$1.99
PRICE
$1.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
2 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/
Preview a sample Build Kit No email needed
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 BingBang: Daily Art & Coloring: map the core Lifestyle workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Open a hand-drawn card each day, find a few encouraging words, and make the artwork your own with coloring and tracing. BingBang offers a small creative pause in your day. A little art, every day Open your daily envelope to discover a hand-drawn card and a few encouraging words. Color it your way Fill a space with color or add your own brush strokes. Explore colors, undo a mark, and take your time. Trace and unwind Follow the illustration as a gentle guide and create a drawing of your own. Your shared drawing contains your own strokes, without the tracing guide. Keep and share your favorites Keep cards in your Collection, save your artwork to edit again, and share an image. The native share sheet now shows a preview of the image you are sharing, including your current edits. A small reminder on your Home Screen Add a widget to keep a favorite drawing close.
Written user reviews are not shown here. Check current App Store reviews >
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
Allow users to set custom icons and colors for better personalization.
Assumption to check: Limited customization options for goals and activities
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate sharing options for activities and journal entries to enhance engagement.
Assumption to check: Lack of social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Add push notifications to remind users of their goals and activities.
Assumption to check: No reminders or notifications for activities
Validate with people who use this workflow before building.
Hypothesis 4
Provide insights and analytics on user performance and activity trends.
Assumption to check: Minimal analytics for tracking progress
Validate with people who use this workflow before building.
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 Paper
TypeScript
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.
