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
BTC Cloud Miner
BTC Cloud Miner lets you participate in cloud-based Bitcoin mining with plans
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.2
42 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'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 BTC Cloud Miner: 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
Include a wider range of mining power selections.
Assumption to check: Limited mining power options
Validate with people who use this workflow before building.
Hypothesis 2
Simplify navigation and enhance clarity of information.
Assumption to check: User interface can be confusing
Validate with people who use this workflow before building.
Hypothesis 3
Provide more in-depth earnings and performance analytics.
Assumption to check: Lack of detailed analytics
Validate with people who use this workflow before building.
Hypothesis 4
Implement a chatbot for instant support and FAQs.
Assumption to check: Slow customer support response
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
BTC Cloud Miner lets you participate in cloud-based Bitcoin mining with plans that never expire. Choose a plan tier, and your plan generates BTC rewards every hour automatically — no hardware, no electricity, no setup. HOW IT WORKS Select a mining plan from one of five tiers. Each plan runs continuously and adds BTC to your in-app balance every hour. Stack multiple plans to increase your hourly rate. When you reach the minimum threshold, withdraw your BTC. FEATURES • Five mining plan tiers: Bronze, Silver, Gold, Platinum, Diamond • Permanent plans — once activated, they keep generating rewards • Automatic hourly BTC reward calculations • Free BTC through rewarded • Daily streak bonuses with multipliers up to 2× • Buy 3 Get 1 Free promotion across all tiers • Referral program — invite friends with your code, both receive a free plan • Live BTC price tracking in GBP and USD • Sign in securely with Apple, Google, or Email ABOUT REWARDS BTC rewards are calculated based on your active plans and credited to your in-app balance every hour. Rewards are variable and depend on your plan tier and any active streak multiplier. This app does not perform on-device mining and does not use your phone's processor or battery for mining.
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 Chart Kit
AsyncStorage
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.
