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
Tap Quiz Maps (Full)
Do you know where Botswana is? …Japan? …Kiribati? …Barbados?
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
9 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.
Build your own version
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/
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 Tap Quiz Maps (Full): 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
Introduce user-generated quizzes and regular updates.
Assumption to check: Limited quiz variety leads to user boredom
Validate with people who use this workflow before building.
Hypothesis 2
Provide detailed explanations and hints for each answer.
Assumption to check: Inconsistent feedback on quiz answers
Validate with people who use this workflow before building.
Hypothesis 3
Add leaderboard and friend challenges.
Assumption to check: Lack of social features for competition
Validate with people who use this workflow before building.
Hypothesis 4
Implement offline access for quizzes and content.
Assumption to check: No offline mode for quizzes
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
Do you know where Botswana is? …Japan? …Kiribati? …Barbados? Now you can learn with Tap Quiz Maps Geography. This game will help you learn the locations of all of the countries in the world, as well as all US States. It's perfect for children learning geography for the first time, or adults! All continents are divided into regions and subregions to allow for simpler and faster learning. No zooming or panning necessary… simply tap on the location of the country when prompted. Maps are divided so that you never need to find more than a handful of countries at a time so that learning is simpler and easier. A great help for anyone interested in geography! Feedback? Send an email at [email protected] This app contains: - World map divided into separate regions by continent and culture - Visual cues to help memorize country and state locations more easily - Small sets countries presented at once for manageable learning - Visual percentage indicators of learning progress - Detailed statistics on performance - Hints to help learn the location of each country Coming soon… - State and country capitals - State and country flags
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
react-native-maps
Zustand
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.
