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
Nava - Sleep & Focus Sounds
Fall asleep faster, focus deeper, and find your calm with Nava — your personal sound sanctuary.
$2.99 · In-app purchases
PRICE
$2.99
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.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included15 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.
JavaScript is required to complete mailbox verification.
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 Nava - Sleep & Focus Sounds: 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.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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
Expand sound library and allow user uploads.
Assumption to check: Limited sound variety compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement a customizable timer feature.
Assumption to check: No timer functionality for sounds
Validate with people who use this workflow before building.
Hypothesis 3
Add offline mode for users to download sounds.
Assumption to check: No offline access for sounds
Validate with people who use this workflow before building.
Hypothesis 4
Integrate with sleep tracking APIs to enhance user experience.
Assumption to check: Lack of deep sleep tracking integration
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
Fall asleep faster, focus deeper, and find your calm with Nava — your personal sound sanctuary. Nava generates pristine colored noise, soothing nature sounds, and binaural beats, all crafted to help you sleep, work, study, or simply unwind. ▸ WHY COLORED NOISE WORKS Unlike music or podcasts, colored noise masks distracting sounds with a consistent, non-intrusive audio blanket. Research shows it can: • Improve sleep quality and help you fall asleep faster • Boost focus and concentration during work or study • Provide relief for tinnitus sufferers • Calm fussy babies and improve infant sleep • Reduce anxiety and racing thoughts ▸ FOUR NOISE COLORS TO MATCH YOUR MOOD • White Noise — Classic, balanced sound for masking distractions • Pink Noise — Softer, deeper tones proven to enhance deep sleep • Brown Noise — Rich, low rumble for ultimate relaxation (TikTok's favorite) • Green Noise — Nature-inspired mid-tones for gentle focus Mix and blend colors to create your perfect soundscape. ▸ NATURE SOUNDS Layer in 8 beautiful nature recordings: Rain · Ocean Waves · Crackling Fire · Wind · Thunder · Forest · Stream · Crickets ▸ BINAURAL BEATS Science-backed frequencies to guide your brainwaves: • Delta (2 Hz) — Deep sleep • Theta (6 Hz) — Meditation & creativity • Alpha (10 Hz) — Calm focus • Beta (20 Hz) — Alertness & energy ▸ SMART FEATURES • Sleep Timer — Set it and drift off; Nava fades out gently • Background Play — Keep listening while using other apps • Lock Screen Controls — Play/pause from anywhere • Home Screen Widgets — One-tap access to your favorite presets • Dynamic Island — See what's playing at a glance ▸ 26 CURATED PRESETS Start instantly with expert-designed soundscapes: Deep Sleep · Rainy Night · Focus Flow · Calm Anxiety · Tinnitus Relief · Baby Lullaby · Coffee Shop · Beach Sunset · and many more ▸ DESIGNED FOR YOUR WELL-BEING • Safe Volume Mode — Protects your hearing • No ads, no interruptions — Ever • Works offline — No internet required • OLED-optimized dark theme — Easy on your eyes and battery ▸ ONE-TIME PURCHASE Pay once, own it forever. No subscriptions, no trials, no hidden fees. Download Nava and discover your perfect sound tonight.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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 Navigation
expo-av
@react-native-async-storage/async-storage
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.
