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
myDream Universe - Build Solar
myDream Universe is a sandbox space simulation game.
$14.99 · In-app purchases
PRICE
$14.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
932 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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Combine features and design from your favorite apps.
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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/
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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 myDream Universe - Build Solar: 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
Offer a wider variety of objects and backgrounds.
Assumption to check: Limited customization options for solar systems
Validate with people who use this workflow before building.
Hypothesis 2
Implement auto-save and cloud save features.
Assumption to check: Difficulty in saving progress
Validate with people who use this workflow before building.
Hypothesis 3
Introduce a freemium model with in-app purchases for additional features.
Assumption to check: High price point for entry
Validate with people who use this workflow before building.
Hypothesis 4
Add options to share systems on social media or within the app.
Assumption to check: Limited social sharing features
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
myDream Universe is a sandbox space simulation game. Start from a small asteroid absorbing other asteroids to form a solar system. Roaming sandbox universe and discover wandering planets or solars, your solar system can earn GP and mass. GP is important to build your system. It is very easy to earn, simply roaming the universe and near other planets you will receive a GP. Mass is everything in the universe. Biggest mass planet alway can destroy other smaller mass planets. So, find smaller mass planets and absorb them, and away from heavy mass planet is the survival rule in the universe. Also mass is available on everywhere, roaming the universe. It is easy to find asteroids, absorb them to develop your planets. This game is mainly focus on develop and growth the solar system. Absorbing mass is slow and long term. Once your sun has enough mass, it can be transform to neutron star or blackhole. In order to let you freely build your dream solar system, we provide a 100 save area. So you can build up to 100 different solar system. ------------ Introduce our new game: Planet Gravity https://apps.apple.com/us/app/id1566504157
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
Axios
React Navigation
Redux Toolkit
React Native Gesture Handler
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.
