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
Steam Mobile
With the free Steam Mobile App, you can take Steam with you anywhere
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 2.7
12,089 ratings · Below Average
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 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 Steam Mobile: 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
Focus on stability and performance testing.
Assumption to check: Frequent crashes and bugs reported by users.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance community features and friend interactions.
Assumption to check: Limited social features compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify navigation and improve UI layout.
Assumption to check: Confusing navigation and cluttered UI.
Validate with people who use this workflow before building.
Hypothesis 4
Implement an in-app support feature for immediate assistance.
Assumption to check: Poor customer support and response times.
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
With the free Steam Mobile App, you can take Steam with you anywhere. Buy PC games and get the latest game and community news - while protecting your Steam account. Shop Steam Browse the Steam catalog of PC games from your phone. Never miss a sale again. Steam Guard Protect your Steam account and make sign in faster with two-factor authentication. • Two-factor authentication to ensure you’re the only one with access to your account • QR code sign in - Scan a QR code to sign into Steam instead of entering a password or… • Sign in confirmation - Confirm your regular Steam sign ins with simple “approve” or “deny” Library & Remote downloads The new Library view makes it easy to view game content, discussions, guides, support, and more. Plus you can manage game downloads and updates to your PC from your phone. Trade and Market Confirmations Speed up item trades and sales by using your phone to confirm them. Plus • A personalized News feed based on your Library with the latest news, events, and content updates direct from publishers and game developers. • Customizable Steam notifications: wishlist, sales, comments, trades, discussions, friend requests, and more. • Access to the entire Steam Community - discussions, groups, guides, Market, Workshop, broadcasts, and more. • Access to your friends, friend activity, groups, screenshots, inventory, wallet, and more. • Authorized Devices - Manage access to the devices your account has signed in • An improved Store browsing experience for mobile screens • Support for using multiple Steam accounts in the app • Support for customizing your app's main tabs
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
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Firebase
BUILD KIT DIFFICULTY
Expert
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.
