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
Hey Duggee Jigsaws
**** As seen on Nick Jr
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
5 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 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 Hey Duggee Jigsaws: 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 diverse puzzles and themes.
Assumption to check: Limited puzzle variety
Validate with people who use this workflow before building.
Hypothesis 2
Introduce a cooperative multiplayer mode.
Assumption to check: No multiplayer feature
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to create and share their own puzzles.
Assumption to check: Lack of user-generated content
Validate with people who use this workflow before building.
Hypothesis 4
Implement a system to track user progress and achievements.
Assumption to check: No progress tracking
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
**** As seen on Nick Jr. **** Introducing Hey Duggee’s first puzzling app: Hey Duggee Jigsaw. Safe, ad-free fun for your little ones! Featuring 22 fantastic puzzles, each with four difficulty levels, the app will suit Duggee fans of all ages from Jigsaw Juniors to Puzzling Professionals. Key Features: • Clear and simple interface designed for pre-schoolers. • 22 different Hey Duggee images to play with. • 4 difficulty levels to suit all ages - 4 piece, 9 piece, 25 piece and 49 piece. • Intuitive Drag and Drop gameplay. • Contextual help system to guide your little one Customer Care: If you experience any technical issues with this app please get in touch. Most issues can be easily fixed and we are happy to help. Contact us at [email protected] Privacy: This app does not collect or store any personal data from your device. View our privacy policy here: www.bbcworldwide.com/home/mobile-apps/ About Studio AKA: STUDIO AKA is a multi-BAFTA winning & Oscar-nominated independent animation studio & production company based in London. They are known internationally for their idiosyncratic & innovative work expressed across an eclectic range of projects. www.studioaka.co.uk About Scary Beasties: Scary Beasties is a mobile and online games designer and developer specialising in kids’ content, from pre-school through to the teen market. www.scarybeasties.com A Scary Beasties production for BBC Worldwide
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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
react-navigation
axios
react-native-gesture-handler
redux
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.
