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
BassMap: Acoustic Visualizer
BassMap turns your home theater into an acoustic masterpiece
$4.99
PRICE
$4.99
No 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 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/
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 BassMap: Acoustic Visualizer: map the core Entertainment workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
BassMap turns your home theater into an acoustic masterpiece. Walk around with your iPhone and build a spatial heatmap that reveals bass peaks, nulls, standing waves, and dead zones. Move your subwoofer. Change your listening position. Adjust EQ or crossover settings. Measure again and compare. Use BassMap to optimize your setup, dial in subwoofer placement, find ideal listening spots, and see exactly how acoustic panels, bass traps, or room layout changes impact your audio performance. **With BassMap you can:** * Locate acoustic dead zones so you know exactly where low end disappears * Find the ideal sub placement through real-time trial and comparison * Dial in your primary listening seat for the flattest frequency response * Verify acoustic treatment to see if your bass traps are actually working * Inspect specific problem frequencies to target annoying room resonances * Track setup iterations with side-by-side visual measurement overlays * Optimize receiver settings by testing different EQ and crossover points Perfect for home theaters, stereo systems, audiophiles, and anyone who wants better bass without guessing. Designed for stereo setups, multi-channel surround, audiophiles, and anyone seeking balanced bass response. **Scan your space. Test your placement. Hear the difference.**
Written user reviews are not shown here. Check current App Store reviews >
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
Include more audio source options like streaming services or local files.
Assumption to check: Limited audio source options
Validate with people who use this workflow before building.
Hypothesis 2
Implement a feedback system for users to report issues or suggest features.
Assumption to check: No user feedback mechanism
Validate with people who use this workflow before building.
Hypothesis 3
Create a forum or a community feature for users to share their visualizations.
Assumption to check: No community engagement
Validate with people who use this workflow before building.
Hypothesis 4
Add onboarding tutorials for new users to understand features quickly.
Assumption to check: Lack of tutorials
Validate with people who use this workflow before building.
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
axios
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.
