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
FlipJoke
FlipJoke - Clean, Clever Jokes for Kids & Families
$3.99 · In-app purchases
PRICE
$3.99
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 included16 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 FlipJoke: map the core Education 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
Include user-generated jokes and quizzes to keep content fresh.
Assumption to check: Limited content variety can lead to user boredom.
Validate with people who use this workflow before building.
Hypothesis 2
Add sharing options for jokes and quiz results to enhance engagement.
Assumption to check: No social sharing features.
Validate with people who use this workflow before building.
Hypothesis 3
Implement user profiles with tailored recommendations based on user activity.
Assumption to check: Lack of personalized learning paths.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce badges and rewards for completing jokes and quizzes to increase motivation.
Assumption to check: Absence of gamification elements.
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
FlipJoke - Clean, Clever Jokes for Kids & Families FlipJoke is a thoughtfully designed joke app made just for kids and the adults who laugh with them. Every joke in FlipJoke is: -Clean & age-appropriate -Beautifully illustrated -Carefully curated for real laughs (not groans) -No ads. No distractions. Just joyful humor you can trust. Why parents love FlipJoke -Safe by design — no ads, no tracking, no inappropriate content -Premium illustrations — colorful, storybook-style art on every joke -Built for kids — simple navigation, big visuals, friendly interactions -Optional explanations — helps kids understand wordplay and build language skills -Audio narration — jokes can be read aloud for early readers or shared laughs FlipJoke feels more like a digital joke book than an endless feed. How it works -Flip through jokes one page at a time -Swipe to reveal the punchline -Save favorites for later laughs -Turn on daily joke reminders for a smile a day Perfect for: -Car rides -Quiet time -Bedtime giggles -Sharing jokes with friends and family A one-time purchase you can feel good about FlipJoke is a single, upfront purchase — no subscriptions, no in-app ads, no surprise charges. Just high-quality content your family can enjoy again and again. Designed with care. FlipJoke was created by a parent-led team focused on: -Quality over quantity -Humor that brings people together -Experiences kids can enjoy independently or with adults FlipJoke - Flip through laughs together.
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.
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BUILD KIT DIFFICULTY
Starter
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.
