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
Barefoot World Atlas
NEW EDITION! Fly around the interactive 3D globe and discover the rich wonders of our planet
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.0
146 ratings · Top 30%
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 included18 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 Barefoot World Atlas: map the core Reference 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
Expand content and add user-generated content features.
Assumption to check: Limited content for some countries
Validate with people who use this workflow before building.
Hypothesis 2
Enhance responsiveness and performance of the globe interface.
Assumption to check: 3D globe interaction can be clunky
Validate with people who use this workflow before building.
Hypothesis 3
Implement a guided tour or tutorial for first-time users.
Assumption to check: Difficult navigation for new users
Validate with people who use this workflow before building.
Hypothesis 4
Offer clear explanations of what is included in each tier.
Assumption to check: In-app purchases may confuse users
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
NEW EDITION! Fly around the interactive 3D globe and discover the rich wonders of our planet. Barefoot World Atlas show-stopping interactive app allows children to explore an enticing, spinning world packed with animated icons, an ever-changing soundscape and interactive quizzes. PRAISE FOR THE 2012 RELEASE “An immersive app that immediately invites exploration” – The New York Times An Apple Editor’s Choice Pick, App of the Week, and in the App Hall of Fame. Featured on NBC’s Today Show as a top education app Originally released in 2012, the newly updated World Atlas app dives deeper into world art, major cities and North America, and a new “surprise” option allows children to discover exciting new features and places on the globe just by shaking their device. With the new “favorites” mode children can personalize their world, providing a fun and interactive way to share their adventures with friends and family. FEATURES: A multi-language, universal app optimised for the retina display Spin, zoom and fly around the globe! Follow an ever-changing musical soundscape Learn fascinating facts about regions, oceans, countries and great cities Read along and listen to geographer and BBC TV presenter Nick Crane, and narrators Seema Anand and Thérèse Plummer Enjoy beautiful animated illustrations by artist David Dean View hundreds of mini-videos and breathtaking photographs Discover some of the world’s artistic masterpieces Test your knowledge with fun, interactive quizzes and puzzles! Languages: English, French, Spanish, Catalan, Japanese, German Don’t forget to SHARE A REVIEW! We’d love to hear from you!
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
Zustand
expo-three
React Navigation
@react-native-async-storage/async-storage
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.
