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
When and Where Are You?
Calm
$0.99 · In-app purchases
PRICE
$0.99
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'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 When and Where Are You?: map the core Health & Fitness 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 social challenges and sharing to boost engagement.
Assumption to check: Limited user engagement features like social sharing
Validate with people who use this workflow before building.
Hypothesis 2
Add HealthKit and Google Fit integration for seamless tracking.
Assumption to check: No integration with other health tracking apps
Validate with people who use this workflow before building.
Hypothesis 3
Provide advanced metrics and progress tracking to keep users motivated.
Assumption to check: Basic user stats without detailed analytics
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize activity types and add notes for better tracking.
Assumption to check: Lack of customization options for logged activities
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. Peace. Joy from within. You don't need to read a bunch of books or to practice for years techniques often associated with various religions. Just use the app when you are in your favorite chair, waiting in line, or stuck in a meeting. When and Where Are You? Based on the same core principles taught from 600BC through today - from Tzu to Aurelius to Watts to Tolle - this is a gentle mindfulness app that helps you notice where your mind is — right now. Most of us spend our days lost in thought, drifting between memories of the past and worries about the future. The app calls you back to here and now. Simply tap or drag your finger across the map during a session. Are you feeling nostalgic? Hopeful? Anxious? Reflective? The map helps you frame your mental journey in real time, showing you exactly where your attention lives. How it works: Start a session and touch the map. Touch or drag to the zone that matches where your mind is. When you drift, notice it — then gently return to center. End your session and see a map of where and when you've been. No accounts. No notifications. No hassle. Just being here now.
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
@react-navigation/native
react-native-maps
axios
expo-location
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.
