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 Halving
Bitcoin Halving is the ultimate Bitcoin companion app featuring real-time price tracking, precise halving countdowns, and powerful widgets — all in a clean, privacy-first experience.
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
20 ratings · Top 5%
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's included18 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 Halving: 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
Add a discussion forum for users to share insights and opinions on Bitcoin halvings.
Assumption to check: Lack of interactive features or community engagement.
Validate with people who use this workflow before building.
Hypothesis 2
Include charts or graphs visualizing the impact of past halvings.
Assumption to check: Limited historical data display.
Validate with people who use this workflow before building.
Hypothesis 3
Implement customizable notifications for users about halving reminders.
Assumption to check: No alerts or notifications for upcoming halvings.
Validate with people who use this workflow before building.
Hypothesis 4
Add articles or tutorials explaining Bitcoin and the significance of halvings.
Assumption to check: Minimal educational content.
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
Bitcoin Halving is the ultimate Bitcoin companion app featuring real-time price tracking, precise halving countdowns, and powerful widgets — all in a clean, privacy-first experience. Track the next Bitcoin halving event, monitor live cryptocurrency prices, and watch the US national debt grow in real time REAL-TIME PRICE TRACKING • Live Bitcoin price via WebSocket connection • Real-time updates every 5 seconds • Price direction indicators (up/down) • Daily percentage change tracking • All-time high (ATH) monitoring with visual alerts • Compare prices from midnight to track daily performance MULTI-CRYPTOCURRENCY SUPPORT • Bitcoin (BTC) • Ethereum (ETH) • Monero (XMR) • Solana (SOL) • Cardano (ADA) • XRP • Chainlink (LINK) • Uniswap (UNI) • Stacks (STX) • Zcash (ZEC) • Toggle individual coins on or off in settings ADVANCED BITCOIN HALVING COUNTDOWN • Dynamic countdown to the next Bitcoin halving • Displays years, months, and days remaining • Precise block-level tracking • Visual progress bar • Next block countdown • Current block height • Blocks remaining until halving • Current block reward information • Average daily Bitcoin mined COMPREHENSIVE WIDGET COLLECTION Choose from multiple widget styles: Home Screen Widgets • Bitcoin Halving Countdown (Small / Medium / Large) • Bitcoin Price (Small) • Bitcoin Price + Debt Combo (Small) • Compact Countdown (Small) • US National Debt (Small) Lock Screen Widgets • Bitcoin Price • Bitcoin + Debt Combo • Days Until Halving • National Debt Counter • Debt + Bitcoin Circular US NATIONAL DEBT TRACKER • Real-time national debt counter • Live growth calculation • Daily debt increase display • Dedicated debt widgets • Updated daily using US Treasury data ADDITIONAL FEATURES • Apple Watch app and complications • Dark mode optimized (OLED-friendly black) • Optional confetti celebrations • No ads, no tracking, no data collection • Supports iPhone, iPad, Mac, Apple Watch, and Apple TV RELIABLE AND ACCURATE Multiple API fallbacks ensure consistent, up-to-date data. Sources include Coinbase, CoinGecko, Blockstream, and the US Treasury. Bitcoin Halving is perfect for Bitcoin enthusiasts, investors, and anyone curious about Bitcoin’s fixed supply schedule — all presented in a fast, reliable, and privacy-focused app.
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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
React Navigation
Expo Notifications
axios
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.
