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
Satoshi Alarm
Never miss a crypto price move again.
$0.99
PRICE
$0.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included15 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 Satoshi Alarm: 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
Provide a more user-friendly alert setting interface with helpful tips.
Assumption to check: Users find it difficult to set and manage alerts.
Validate with people who use this workflow before building.
Hypothesis 2
Enable users to customize alert thresholds and notification methods.
Assumption to check: Lack of customization options for notifications.
Validate with people who use this workflow before building.
Hypothesis 3
Integrate comprehensive historical price charts with multiple time frames.
Assumption to check: Limited historical data visualization.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to choose from a variety of cryptocurrencies and display them accordingly.
Assumption to check: Inadequate support for multiple currencies.
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
Never miss a crypto price move again. SatoshiAlarm is the simplest way to set price alerts for your favorite cryptocurrencies. Whether you're waiting for Bitcoin to break a resistance level or watching for an altcoin dip, SatoshiAlarm wakes you up the moment the market moves in your favor. KEY FEATURES • Real-time price alerts — choose any coin from the top cryptocurrencies and set a target price. SatoshiAlarm monitors the market in the background and fires an alarm the instant the price crosses your threshold. • Above & below alarms — set an alert for when a price goes above or below your target. Perfect for catching breakouts and dip-buying opportunities alike. • Sound or vibration — receive a loud audio alarm or a silent vibration alert, whichever suits your environment. Snooze the alert with a single tap and get reminded again in 5 minutes. • Notification history — every triggered alarm is saved so you can review exactly when and at what price each alert fired, even if you missed it. • Multi-currency support — view prices and set targets in US Dollars (USD) or Euros (EUR). • Multiple simultaneous alarms — track as many coins as you want at the same time. Activate or deactivate individual alarms without deleting them. • Always up to date — prices refresh automatically every 30 seconds, and you can force a refresh at any time with a single tap.
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
chart.js
react-navigation
react-native-paper
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.
