App Overview

Volume Booster - EQ Amplifier icon

Volume Booster - EQ Amplifier

Nguye Thi Hien · Music

Volume booster is a simple, small but powerful app to boost volume of your phone and tablet to extra volume

Free

PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
4.3
7,217 ratings · Top 30%

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/
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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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Free quick prompt For a smaller starting point

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 Volume Booster - EQ Amplifier: 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 more advanced equalizer settings and filters.

Assumption to check: Limited control over audio quality and customization

Validate with people who use this workflow before building.

Hypothesis 2

Allow users to save and share their custom equalizer presets.

Assumption to check: Inability to save custom presets

Validate with people who use this workflow before building.

Hypothesis 3

Add offline capabilities for saved audio settings.

Assumption to check: No offline functionality

Validate with people who use this workflow before building.

Hypothesis 4

Create a premium ad-free version with enhanced features.

Assumption to check: Ads can disrupt user experience

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

Volume booster is a simple, small but powerful app to boost volume of your phone and tablet to extra volume. Useful for movies, audio books, music and games. Volume booster can increase volume of all media, including music, video, ringtone, alarm volume and etc. Brilliant features of Volume Booster: - Bass booster & 3D virtualizer effect - 10-band Equalizer with 20+ preset effects - Enhance the volume without affecting the sound quality - A sound booster for headphones, Bluetooth & speakers - Wonderful visual sound spectrum - Pleasant stereo surround sound effects - Stylish & simple user interface - No root required Note: To get the best results, pair this app with your best headphones. If you don’t have a pair of headphones or if you want to use a speaker, you can still enjoy good music with our app. This is also a great speaker booster if you use a Bluetooth speaker to listen to music or if you use a good music system with a subwoofer. Information about the auto-renewal of subscription: - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the period. - If you want to continue the service, your subscription should be continued. - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - The account will be charged for renewal within 24-hours prior to the end of the current period. - There are 3 packages including: 1 week, 1 month and 1 year with the weekly package allowing a 3-day trial period. Once it expires, your subscription will automatically renew. The following subscription plans are available (price may vary depending on location): – 1-week subscription with a 3-day trial version – US$ 4.99 – 1-month subscription – US$ 9.99 – 1-year subscription with a 3-day trial version – US$ 29.99 - You can cancel your subscription via this URL: https://support.apple.com/en-us/HT202039 Privacy Policy: https://cemsoftwareltd.com/privacyPolicy.html Terms of Use: https://cemsoftwareltd.com/term.html Support: https://cemsoftwareltd.com/contact.html

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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.