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
等等加仓
Calm Add is a cost averaging calculator designed specifically for stock traders.
$12.99
PRICE
$12.99
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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Combine features and design from your favorite apps.
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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 included14 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 等等加仓: 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
Incorporate interactive and intuitive charting features.
Assumption to check: Many finance apps lack user-friendly data visualization.
Validate with people who use this workflow before building.
Hypothesis 2
Implement robust bank linking with user-friendly onboarding.
Assumption to check: Difficulty linking bank accounts securely.
Validate with people who use this workflow before building.
Hypothesis 3
Enhance automatic categorization and editing capabilities.
Assumption to check: Poor categorization of transactions.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce comprehensive budget tracking with alerts and notifications.
Assumption to check: Limited budget tracking features.
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
Calm Add is a cost averaging calculator designed specifically for stock traders. When your position is at a floating loss, many investors consider whether to average down, how much to add, and at what price range. This app helps you quickly calculate the new average holding cost under different price and quantity combinations, making your decisions clearer and more rational while avoiding impulsive trades. Key Features: • Input current holding shares and cost • Input available funds and current price • Input price fluctuation range • Automatically generate add-position tables for different price ranges and purchasable quantities • Visually display updated average cost, profit/loss, and position value after adding • Save records locally and review historical data anytime This app is for calculation purposes only and does not constitute investment advice. Investing involves risk. Please make decisions cautiously. All data is stored locally on your device. No user information is collected or uploaded.
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
ApexCharts
Axios
React Navigation
AsyncStorage
BUILD KIT DIFFICULTY
Starter
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.
