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
Cognitive Shuffle: Sleep Fast
Can't fall asleep? Your mind won't stop racing?
$1.99
PRICE
$1.99
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's included16 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 Cognitive Shuffle: Sleep Fast: 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
Include a tutorial or tips on how to effectively use the shuffle.
Assumption to check: Users may find cognitive shuffle confusing at first.
Validate with people who use this workflow before building.
Hypothesis 2
Add more customization options for shuffle speed and sound effects.
Assumption to check: Limited settings options may not cater to all users.
Validate with people who use this workflow before building.
Hypothesis 3
Integrate a sleep tracker to measure and display user sleep data.
Assumption to check: No feedback on progress or improvement in sleep quality.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce social sharing or challenges to enhance motivation.
Assumption to check: Lack of social features may limit user engagement.
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
Can't fall asleep? Your mind won't stop racing? Drift uses the science-backed Cognitive Shuffle method to help you fall asleep faster — no meditation, no breathing exercises, just words. How it works: Simply tap Start, close your eyes, and listen. Drift whispers random, unconnected words to your mind — breaking the cycle of anxious thoughts and guiding your brain into sleep. Based on research by cognitive scientist Dr. Luc Beaudoin, the Cognitive Shuffle technique mimics the natural thought patterns of sleep onset, helping your brain transition from wakefulness to rest. ◆ Zero setup — open and sleep ◆ 8 languages — English, Spanish, Portuguese, German, Russian, Chinese, Arabic, Turkish ◆ Alphabet mode — engage your mind gently ◆ Adjustable word speed — 4 to 15 seconds ◆ Auto sleep timer — 15, 30, or 60 minutes ◆ Fades out automatically when timer ends
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
expo-av
react-native-countdown-component
Zustand
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.
