App Overview

Sonance - Visual Music Player icon

Sonance - Visual Music Player

Rare Works, LLC · Entertainment

Sonance - A music player, an audio spectrum analyzer, and a decibel meter.

$0.59 · In-app purchases

PRICE
$0.59
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
1.6
5 ratings · Below Average

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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A product spec, screen plans, and build steps for your coding agent.

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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/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

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.

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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Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for Sonance - Visual Music Player: 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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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

Add more visual effects and music integration features.

Assumption to check: Limited functionality compared to competitors

Validate with people who use this workflow before building.

Hypothesis 2

Focus on a cleaner, more user-friendly design.

Assumption to check: Poor user interface design

Validate with people who use this workflow before building.

Hypothesis 3

Allow users to customize visuals and themes.

Assumption to check: Lack of customization options

Validate with people who use this workflow before building.

Hypothesis 4

Optimize the app for better performance across all devices.

Assumption to check: Inconsistent performance on older devices

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

Sonance - A music player, an audio spectrum analyzer, and a decibel meter. Sonance plays music that is on your device, and displays waveform and audio spectrum visualizations, plus power level meters. You can see the beat ! Sonance has an in-car user interface, with large buttons, and swipe gestures to move between songs. It's good to use while driving, since you don't have to focus much on it to make a desired change, yet it also has entertaining visualizations to enhance the musical experience, when you can focus on it. Sonance has an easy to use shuffle mode, as well as the ability to repeat one, or a queue of chosen songs. It has a variety of settings allowing personal customization of startup, user interface, and visualizer settings. The visualizer has a full screen mode, that allows for all manner of customization, via pinch and swipe gestures. Sonance also works well with AirPlay, and the visualizers look great when Mirroring your device. Sonance also has the ability to visualize input from the microphone. This allows you to have fun with sound ! It analyzes sound from the built in microphone, or from an attached external microphone, and displays both the audio input signal, and the "frequency bars", which are the results of the spectrum analysis. The audio input signal is displayed in the lower view as a waveform and the spectrum is displayed in the upper view as bars indicating the strength of that frequency within the audio input signal. Frequencies range from 0 hertz to 24000 Hertz or 24K, this is the range of the iPhone and iPad microphone, and also the general range of human hearing. The decibel meter shows audio levels in two metrics. Recorded audio levels are shown as dB FS ( Full Scale ), -120 db to 0 db. Where 0 db is the highest possible level. For audio levels from the microphone or line-in device, the levels are shown as dB SPL ( Sound Pressure Level ), 0 db to 100 db. 120 db can cause pain, 140 db can cause damage. You can use a horizontal and vertical pinches on either display to zoom in/out of the visualization. On the Spectrum display you can also use a slide gesture, to move the display left and right, allowing you to see specific frequencies in detail. Pinches are cumulative, so keep pinching. The settings panel allows you to reset the app to default settings, so have fun exploring sound !

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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.

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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.