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
Sound Board - Funny Sounds!
• Only the best action-packed, funny sounds to mess with your friends and family.
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
524 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 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.
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 Sound Board - Funny Sounds!: 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
Expand the library of sounds and allow user uploads.
Assumption to check: Limited sound selection compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to personalize button colors and layouts.
Assumption to check: Lack of customization for sound buttons
Validate with people who use this workflow before building.
Hypothesis 3
Implement offline storage for favorite sounds.
Assumption to check: Poor offline functionality
Validate with people who use this workflow before building.
Hypothesis 4
Add features to share sounds via social media.
Assumption to check: No sharing options for sounds
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
• Only the best action-packed, funny sounds to mess with your friends and family. • 99 sounds and counting! • You and your loved ones lives will not be complete without this app. Features: + Total of 99 High Quality Sounds! + Multi-board feature! + Original SoundBoard with 75 action packed sounds! + Now a hilarious Fart Board with 24 ridiculous farts! + Random button that talks to you! + Sounds can be re-arranged + Random fart button! + Looping sounds, just hold the button! + Stop all sounds by pressing the logo + Random button easter egg! + Epic sounds! + Shake your device for a random sound! + Lastly the capability to annoy anyone in the general area Original Sounds Include: -Boing -Chimpanzee -Toilet -Ahooga -Squeeze Toy -Aaaah -Laugh -Boo -Applause -Door Bell -Rooster -Harley -Black Board -Gong -Chainsaw -Two Punches -Slap -Baby Cry -Vuvuzela -Shatter -Crickets -Burp -Explosion -Punch Line -Gun -Police -Vomit -Two Farts -Y U NO -Elephant -Alarm Clock -Siren -Dog Bark -Unknown sound? -Drumroll -Darth Vader -Sneeze -Jaguar -Sonar -Charge -Clown Horn -Scream -Cow -Cash -Horror -Tug Boat Horn -Angry Cat -Cartoon Failure -Cash Register -Chicken -Crowd Laughing -Lone Wolf -Magic Wand -Man Scream -Mhmm -Monster Roar -Ohhh -Retro Phone -Roller Coaster -Sheep -Slide Whistle -Whip -Whoa -Yawn -Water Splash -Can Opening -Record Scratch -Clock Ticking -Heavens Gates -Heart Beat -Whistle -Bowling Strike -You're Out -Duck Quack Fart Board Sounds Include: -Dirty Burrito -Little Ripper -Taco Torpedo -Crunchy Frog -Brown Cloud -Chicken Soup -Bun Thunder -Air Monkey -Flabbergaster -Ripsnorter -Brown Kitty -Squeezer -Bubblers -Air Biscuit -Flooper -Brown Fire -Nether Belch -Wet One -Butt Burp -Buzzer -Hot Wind -Mud Duck -Quack -Wind Bag
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
Zustand
React Navigation
expo-av
react-native-gesture-handler
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.
