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
Bass Resonance
BASS RESONANCE
$6.99 · In-app purchases
PRICE
$6.99
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.
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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 included14 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 Bass Resonance: 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
Implement a larger library of presets and user-generated content.
Assumption to check: Limited preset options may frustrate users.
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the interface with guided tutorials.
Assumption to check: Complex UI may overwhelm new users.
Validate with people who use this workflow before building.
Hypothesis 3
Optimize audio performance based on device capabilities.
Assumption to check: Audio quality may vary on different devices.
Validate with people who use this workflow before building.
Hypothesis 4
Add options for users to share their mixes on social media.
Assumption to check: No social sharing features.
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
BASS RESONANCE Add deep, focused low-end resonance without mud. RESONANT LOW-END ENHANCEMENT Shape the weight and depth of your tracks with a focused bass resonance circuit designed to add size, punch, and controlled sub energy. Bass Resonance is modeled on the legendary Little Labs Voice Of God* 500 Series, bringing focused low-end resonance and weight to your mixes. TUNE THE FUNDAMENTAL Sweep the resonance point to lock the low end to the source, from huge kick drums and bass guitars to vocals, synths, and drums. BIGGER SOUND, LESS MUD Enhance the lows you want while keeping unnecessary sub buildup under control, helping tracks feel larger without clouding the mix. FAST, MUSICAL CONTROL A simple, direct interface lets you dial in powerful low-frequency character in seconds, from subtle body to massive bass reinforcement. Works as a standalone app, AudioUnit v3 effect, or Inter-App Audio effect *Legal Disclaimer: Little Labs, Voice Of God is trademarks or registered trademarks of Little Labs. Bass Resonance was developed by Nembrini Audio SRL based on its own modeling techniques. Little Labs has not endorsed nor sponsored Bass Resonance in any manner, nor licensed any intellectual property for use in this product.
Written user reviews are not shown here. Check current App Store reviews >
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.
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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.
