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
ThetaJourney
ThetaJourney uses scientifically-designed binaural beats to help your brain find its natural rhythm—whether you need deep sleep, focused concentration, peaceful meditation, or complete relaxation.
$4.99 · In-app purchases
PRICE
$4.99
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.
Build your own version
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 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 ThetaJourney: 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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Continue in Rork >
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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
Use precise algorithms for better tracking.
Assumption to check: Poor fitness journey tracking accuracy.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a comprehensive food database.
Assumption to check: Limited nutrition logging capabilities.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce gamification and rewards.
Assumption to check: User engagement drops after initial use.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify UI and enhance navigation.
Assumption to check: Cluttered interface.
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
ThetaJourney uses scientifically-designed binaural beats to help your brain find its natural rhythm—whether you need deep sleep, focused concentration, peaceful meditation, or complete relaxation. How It Works Binaural beats work by playing slightly different frequencies in each ear. Your brain naturally synchronizes to the difference, gently guiding you into desired mental states. It's like a massage for your mind. Five Goal-Based Presets - Sleep – Delta waves (2 Hz) for deep, restorative rest - Meditate – Theta waves (6 Hz) for mindful awareness - Focus – Beta waves (20 Hz) for concentration and productivity - Relax – Alpha waves (10 Hz) to release tension and unwind - Explore – Low theta (4 Hz) for creativity and insight Features - Pure, scientifically-tuned binaural frequencies - Soothing nature sounds (rain, ocean, forest, fire, wind) - Session timer with gentle milestones - Progress tracking with streaks and history - Wisdom quotes from sound healing teachers - Clean, distraction-free interface - Background audio support Headphones Required Binaural beats only work with stereo headphones. Each ear must receive a different frequency for the effect to occur. Start your journey to a calmer mind today.
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
Zustand
React Native SVG
Expo Haptics
React Navigation
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.
