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
Big Button Box - Sound Effects
Ready to take your sound effects game to the next level? With over 5,000 5-star reviews, Big Button Box™ is your ultimate weapon of auditory awesomeness!
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
391 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/
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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.
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 Big Button Box - Sound Effects: 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
Offer a wider selection of sound effects in the free version.
Assumption to check: Limited sound effects available in the free version.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a search feature to quickly locate sounds.
Assumption to check: Difficulty in finding specific sound effects.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to create custom playlists of sound effects.
Assumption to check: Lack of customization options for sound effects.
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
Ready to take your sound effects game to the next level? With over 5,000 5-star reviews, Big Button Box™ is your ultimate weapon of auditory awesomeness! With so many BIG BUTTONS to choose from, get ready to unleash BIG BOOMING FUNNY SOUNDS that'll have you and your crew cracking up non-stop! Why settle for ordinary when you can crank up the volume with Big Button Box? Whether you're chilling with your squad or just need a quick laugh, this app's got your back. *** OVER 5,000 5-STAR REVIEWS! *** * "One of my favorite apps!" CrazyMikesapps.com * "Awesome - This app is a must buy!" J Lesko * "I am enjoying this app WAY 2 MUCH!!!!! I can't stop laughing" RAYdiant * "This app is amazing. I've had it 2 years and never had a problem with it" TheLindoMan * "If you like annoying people, or just a good laugh, this is the app for you" Jaymandoo Features: Over 100 Big Buttons: A vast collection of larger-than-life buttons, each with its own unique sound to keep you entertained for hours on end! Three Button Modes: Choose from three exciting modes that let play the sounds from the menu or use the big buttons full screen one at a time. Pitch Shift: Use motion control to warp the pitch of the sounds. Unleashes endless possibilities for sound effect experimentation. Personalized Button Sorting: Take control of your soundboard! Arrange the buttons in any order you desire, putting your favorite sounds front and center for quick access whenever you need them. Randomizer: Spice things up with the ultimate surprise! Activate the randomizer to shuffle the buttons into exciting new combinations, keeping the fun fresh and unpredictable every time you play! Performance Recording: Record and share your epic sound effect performances instantly! Capture your favorite moments and unleash them with friends at the tap of a button!
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
React Native
Expo
react-navigation
expo-av
react-native-async-storage
BUILD KIT DIFFICULTY
Starter
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.
