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
Blue Hat, Green Hat - Sandra Boynton
** Children's Technology Review Editor's Choice
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.8
37 ratings · Top 50%
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 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 Blue Hat, Green Hat - Sandra Boynton: map the core Books 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
Enhance engagement with more interactive elements.
Assumption to check: Limited interactivity on pages.
Validate with people who use this workflow before building.
Hypothesis 2
Add language selection for audio narration.
Assumption to check: No audio options for different languages.
Validate with people who use this workflow before building.
Hypothesis 3
Implement clearer navigation cues and onboarding.
Assumption to check: Some users find navigation confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize reading experience with themes.
Assumption to check: Lack of personalization options.
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
** Children's Technology Review Editor's Choice “OOPS…” Blue Hat, Green Hat, Sandra Boynton’s famous and funny book, comes alive with sound and zestily ingenious interactivity. This wonderfully clever digital book app will surprise kids and grownups alike. Turkeys may also enjoy it, if they can ever figure out how to turn the dang thing on. Three earnest animals and one misguided turkey learn colors and clothes. Though admittedly, the turkey never quite gets the hang of it. “I have a particular fondness for Blue Hat, Green Hat. At age three, my son Devin had a surprisingly hearty laugh for a small person—a laugh that would make everyone else laugh. I created this book long ago specifically to elicit that belly-laugh from him. It was great fun to re-invent this book as an interactive e-book app, collaborating again with my endlessly clever Loud Crow friends. The digital dimension gave us so many terrific opportunities for adding theatrical flair to this spare yet decidedly Vaudeville book.” - Sandra Boynton Far beyond any e-book experience, the Blue Hat, Green Hat interactive book app has all the magic and appeal of a traditional pop-up book, offering lively interactivity and nifty discovery. The third Sandra Boynton book app, all of them created in collaboration between Boynton Moo Media along with the award-winning developer Loud Crow Interactive. Blue Hat, Green Hat follows their wonderful top-selling debut, The Going To Bed Book app, and the glorious bestselling Moo, Baa, La La La! app Features: * Touch the animals to prompt them to move and respond. * Touch “OOPS” to cause a different surprise on each page. * Tilt your device to watch things slide and cascade. * Dress the turkey with colorful pop-in/pop-out clothes * Boynton has redrawn and recolored the original illustrations, and also added new touch-animations * Wonderful resonant and wry narration by British Invasion legend, Billy J. Kramer * Includes a original sounds and soundtrack, “William Mattel Overture,” a melody for toy crank-guitar, written by Sandra Boynton, performed by Michael Ford * Realistic page turning interactions just like the original board book * “The Big Guy Reads It” narration mode with word highlighting to help improve reading skills * Or “I want to read it myself” to hear individual words pronounced with the tap of a finger Visit us: www.loudcrow.com Follow us: twitter.com/loudcrowinc Like us: facebook.com/loudcrow
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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
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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.
