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
JBL Headphones
JBL Headphones app redefines your headphones experience
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
131,925 ratings · Top 15%
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 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 JBL Headphones: map the core Music 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
Offer more advanced equalizer settings and custom presets
Assumption to check: Limited customization options for sound settings
Validate with people who use this workflow before building.
Hypothesis 2
Streamline update process and provide clear update benefits
Assumption to check: Frequent firmware update prompts
Validate with people who use this workflow before building.
Hypothesis 3
Simplify navigation and screen layouts for better usability
Assumption to check: User interface can feel cluttered
Validate with people who use this workflow before building.
Hypothesis 4
Enhance accuracy of battery management and notifications
Assumption to check: Inconsistent battery level reporting
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
JBL Headphones app redefines your headphones experience. Through your mobile device, you can now conveniently control the headphone settings, smart ambient, noise cancelling and many more in your JBL Headphones app. Supported models are: - JBL WAVE BUDS, WAVE BEAM, WAVE FLEX, VIBE BUDS, VIBE BEAM, VIBE FLEX, JBL TUNE FLEX, TUNE ANC, TUNE 130NC TWS, TUNE 230NC TWS, TUNE BEAM, TUNE BUDS, TUNE FLEX 2, TUNE BUDS 2, TUNE BEAM 2 WAVE BEAM 2, WAVE BUDS 2, WAVE FLEX 2, VIBE BEAM 2, VIBE BUDS 2, VIBE FLEX 2 - JBL TUNE525BT, TUNE 520BT, TUNE 530BT, TUNE535BT,TUNE520BT2, TUNE 720BT, TUNE 730BT, TUNE735BT,TUNE 670NC, TUNE 770NC, TUNE 680NC, TUNE 780NC, TUNE 785NC - JBL LIVE FREE 2, LIVE PRO 2, LIVE FREE NC+ TWS, LIVE PRO+ TWS, LIVE300 TWS, LIVE FLEX, LIVE BEAM 3, LIVE BUD 3, LIVE FLEX 3 - JBL LIVE 670NC, LIVE675NC, LIVE 770NC, LIVE 460NC, LIVE 660NC, LIVE 400BT, LIVE500BT, LIVE 650BTNC, LIVE 220BT - JBL CLUB PRO+ TWS, CLUB700BT, 950NC, ONE - JBL TOUR PRO+ TWS, TOUR ONE, TOUR PRO 2, TOUR ONE M2, TOUR PRO 3, TOUR ONE M3 - JBL SOUNDGEAR SENSE, SOUNDGEAR FRAMES, SENSE LITE，SENSE PRO, , SOUNDGEAR CLIPS - JBL QUANTUM TWS, QUANTUM TWS AIR - JBL ENDURANCE PEAK 3, ENDURANCE RACE, ENDURANCE RACE 2 - JBL REFLECT AERO, REFLECT FLOW PRO, REFLECT MINI NC, REFLECT AWARE - UA PROJECT ROCK OVER-EAR TRAINING HEADPHONES - JBL EVEREST ELITE100, 150NC, 300 and 750NC - JBL X TOMORROWLAND - JBL QUANTUM STREAM WIRELSS - JBL QUANTUM 360 WIRELESS, QUANTUM 360P, QUANTUM 360X - JBL JUNIOR 320BT, JUNIOR 470NC, JBL JUNIOR FREE Other features include: - EQ Settings: The App provides predefined EQ presets and allows you to create or customize EQ settings as per their personal preferences. - Customize ANC: Select different noise cancelling level to enjoy the best sound on each occasion (available only on specific models) - Smart Audio & Video: improve your audio that is adjusted to what you are doing (available only on specific models) - Application Settings: App settings include Voice Assistant, Smart Audio & Video, Touch gesture setting, Product help, Tips, FAQ, etc, subject to different models. - Gestures: allow you to change your button configuration based on your preference (available only on specific models) - Headphone battery indicator: Displays the headphone battery level so you can quickly see how much playtime is left. - Tips: Product tutorial will be found under Product help. - FAQ: Allows you to find quick answer when using our JBL APP. - Voice assistant setup: Allows you to select Google Assistant or Amazon Alexa as your voice assistant.
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
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BUILD KIT DIFFICULTY
Advanced
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.
