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
Zenstack – Meditation Mixer
Experience Deep Relaxation with Custom Meditation Mixes
$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
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
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Add to a Remix
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 included17 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 Zenstack – Meditation Mixer: 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
Create a streamlined experience focusing only on sound mixing.
Assumption to check: Users often find meditation apps too complicated with too many features.
Validate with people who use this workflow before building.
Hypothesis 2
Provide extensive sound libraries and customization features.
Assumption to check: Lack of personalization options in sound selection.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce affordable or tiered pricing for different user needs.
Assumption to check: High subscription fees deter users.
Validate with people who use this workflow before building.
Hypothesis 4
Add social sharing and challenges to engage users.
Assumption to check: Limited social features for community 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
Experience Deep Relaxation with Custom Meditation Mixes Discover a new way to meditate with ZenStack Pro, the ultimate app for immersive, personalized meditation experiences. Unlike traditional meditation apps, ZenStack Pro lets you stack soothing sounds, healing frequencies, and positive affirmations to create your own perfect meditation environment — anytime, anywhere. Key Features: Customizable Sound Stacks: Combine multiple ambient sounds to craft a meditation session that fits your mood. Mix rain, ocean waves, wind chimes, and more for a fully immersive experience. Healing Frequencies: Explore a range of binaural and solfeggio frequencies designed to promote relaxation, focus, and balance. Guided Affirmations: Boost your mindfulness practice with positive affirmations tailored to your meditation goals. Personalized Experience: Save your favorite sound combinations and repeat sessions to create a meditation routine that works for you. Offline Access: Meditate anywhere, without needing Wi-Fi. Beautiful, Intuitive Interface: Easy-to-use design lets you focus on your practice, not on the app. Whether you’re looking to reduce stress, improve focus, sleep better, or enhance mindfulness, ZenStack Pro gives you the tools to create your own meditation sanctuary. Why Users Love ZenStack Pro: “Finally, an app that lets me mix sounds exactly how I want!” “The frequencies and affirmations make my sessions so much more powerful.” “Custom meditation sessions that I can carry anywhere — perfect for work or travel.” Start your journey to deep relaxation and mindful living today. Create your own meditation experience and let the combination of sounds, frequencies, and affirmations guide you to inner calm and focus. Download ZenStack Pro now and transform your meditation practice!
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
FastAPI
Zustand
expo-av
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.
