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
Pocket Build
Have you ever wanted to make your own little fantasy world? A farm, some kind of castle, or just an epic fantasy city? Pocket Build is an open world game where you can build with no limitations or restrictions
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
27,047 ratings · Top 15%
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 Pocket Build: map the core Games 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 regular updates with new items and building features.
Assumption to check: Limited building options can lead to repetitive gameplay
Validate with people who use this workflow before building.
Hypothesis 2
Add a multiplayer feature allowing users to share and build together.
Assumption to check: No multiplayer mode can feel isolating
Validate with people who use this workflow before building.
Hypothesis 3
Offer more free content and transparent pricing for in-app purchases.
Assumption to check: In-app purchases can create frustration for users
Validate with people who use this workflow before building.
Hypothesis 4
Optimize graphics and performance for a wider range of devices.
Assumption to check: Performance issues on older devices
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
Have you ever wanted to make your own little fantasy world? A farm, some kind of castle, or just an epic fantasy city? Pocket Build is an open world game where you can build with no limitations or restrictions. Build whatever you like, whenever you like, however you like. The possibilities are endless! - Featured as Game of the day. - #1 game in over 57 countries. - "An open world sandbox building game with a great 3D graphics engine." - AppAdvice Castles, people, animals, trees, fences, farms, bridges, towers, houses, rocks, land, it's all their for the building. The only limit is your imagination! - Hundreds of items to build. - Huge open world. - Build instantly. - Collect resources and build special items. - Command your humans to do various tasks. - Beautiful 3D graphics. - New items added every update. - Endless possibilities. - Buildings, Trees, People, Animals, Fences, Pathways, Castles, Skulls, Barrels, Farms, Bridges, Towers, Houses, Rocks, and loads more! - Build, rotate, and place items anywhere in the world. - Control the camera view, rotate, zoom. - 3D touch support. - Haptic feedback. The possibilities are endless! Build your own city, build your own world, build your own castle, be creative, craft your land, build a town, create your own adventure, build anywhere in an open world. Become a Pocket Builder today! ----------------------------------------- The game contains an optional subscription feature. It is not required to play and enjoy the game. If you choose to purchase the subscription, payment will be charged to your iTunes account, and your account will be charged for renewal within 24 hours. Subscription starts at $0.99/week. Prices are in US dollars and may vary in other countries. Auto-renewal can be turned off at any time by going to your settings in the iTunes store after purchase. The subscription can be cancelled at anytime. If you don't choose to purchase the subscription, the game can still be fully played without it. Terms & conditions can be found here https://moonbear.com/terms-and-conditions
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 Navigation
Expo-Three
Zustand
React Native Async Storage
Three.js
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.
