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
LT.SOUNDS
๏ LT.SOUNDS ๏
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.3
377 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 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 LT.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
Competitive pricing with generous free tier
Assumption to check: Expensive subscription
Validate with people who use this workflow before building.
Hypothesis 2
Focus on most-requested features first
Assumption to check: Missing features
Validate with people who use this workflow before building.
Hypothesis 3
Optimize for 60fps, fast load times
Assumption to check: Poor performance
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
๏ LT.SOUNDS ๏ This is the Official Soundboard of LT.LICKME, the troller with over 1.1 Million subscribers on YouTube! From the people who brought you the LT.ARMY App, we're back bringing you a brand new app! ๏ #1 Paid Entertainment in US ๏ ๏ #1 Paid Entertainment in UK ๏ ๏ #3 Paid Overall in US ๏ ๏ #5 Paid Overall in UK ๏ ๏ #1 Paid Entertainment in AU ๏ ๏ #1 Paid Entertainment in CAD ๏ ๏ #1 Paid Entertainment in NO ๏ ๏ #1 Paid Entertainment in NZ ๏ Application Features ๏ Be able to troll whilst being part of Anonymous! ๏ Be able to troll whilst being The Watcher! ๏ Switch between Anonymous & The Watcher and troll with the famous sayings & phrases ๏ Choose between a variety of different phrases allowing you to become the characters ๏ Have the ability to Tweet to LT.LICKME himself ๏ Have all your favourite sayings from LT.LICKME in one place ๏ View all of LT.LICKME's social media ๏ Support for iPhone 6/6+/6s/6s+/7/7+/8/8+/X ๏ Follow us on Twitter https://twitter.com/DarkFoxLabs ๏ Follow us on Facebook https://facebook.com/DarkFoxLabs ๏ Follow us on Instagram https://instagram.com/DarkFoxLabs ๏ Check out our website https://darkfoxlabs.io If you find any bugs or issues with the app please tweet @DarkFoxLabs so we can work on getting them fixed, if you have any suggestions as to what you would like to see in the app as well please tweet @DarkFoxLabs or @LTLICKME so we can take your thought in to consideration!
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
Supabase
RevenueCat
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.
