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
Bitcoin - Live Badge Price
Now you don't even need to start the app to track BTC prices and get notified on the BTC moves
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.3
85 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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included16 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 Bitcoin - Live Badge Price: map the core Finance 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
Implement a more reliable data source with lower latency.
Assumption to check: Inconsistent price updates due to API latency.
Validate with people who use this workflow before building.
Hypothesis 2
Offer more complex alert options, such as percentage changes.
Assumption to check: Limited alert conditions.
Validate with people who use this workflow before building.
Hypothesis 3
Add historical data charts for better insights.
Assumption to check: No historical price data for analysis.
Validate with people who use this workflow before building.
Hypothesis 4
Implement push notifications for price changes.
Assumption to check: Requires manual price checks.
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
Now you don't even need to start the app to track BTC prices and get notified on the BTC moves. Packed with features, this makes the best real time BTC price tracking system on the market. This is not just an app, it is entire price tracking and notification system. Our app is backed by a powerful push notification server delivering user defined price alerts to your home screen, real-time prices to the badge and price information with the chart data directly to the widget. FEATURES THAT WORK WITHOUT EVEN RUNNING THE APP: ● Price information and price chart using widget technology ● Price on the app badge through push notifications ● Price change alerts on your home screen through push notifications FEATURES INSIDE THE APP: ● Real time price information ● Historical chats ● Custom alert editor ● Price conversion: currencies, ounces and kilograms (in progress) ● Market overview: commodities, currencies and stock indexes (in progress) ● Both orientations supported
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
react-native-push-notification
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.
