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
Drum Roll & Rimshot Sounds FX
Play all kinds of drumroll and rimshot sounds from your phone! Just tap each sound pad to hear the drumroll/rimshot sound -- no complicated settings or options! This soundboard app is perfect for comedy club, any part...
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 ratings · Top 5%
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 included14 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 Drum Roll & Rimshot Sounds FX: 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 library with user-uploaded sounds or categories.
Assumption to check: Limited variety of sound effects
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate sharing options for sounds.
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to create custom playlists.
Assumption to check: Lack of customization
Validate with people who use this workflow before building.
Hypothesis 4
Enable offline downloading of sounds.
Assumption to check: No offline access
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
Play all kinds of drumroll and rimshot sounds from your phone! Just tap each sound pad to hear the drumroll/rimshot sound -- no complicated settings or options! This soundboard app is perfect for comedy club, any party or events, joking around, pranking your friends or just for pure fun! A drumroll is a series of drumbeats and is often used for social settings or events. Drumroll please! About Our Soundboard Apps: Our soundboard apps have been downloaded millions of times, and have been used for joking around with friends and family, to support favorite teams on game day and just for pure fun! Our apps have been featured in many famous worldwide publications. Why download our apps? - Easy to use, nice clean interface - High-quality sounds (meticulously remastered to cut out any background noise) - Loop option to play sound endlessly - Random button to play sounds randomly - Timer feature (select a specific time when to play sound) - Help page / Contact us support We hope you enjoy our apps and contact us if you have any questions or concerns.
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
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expo-av
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.
