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
Halloween Alert Tones - Scary new sounds for your iPhone
CELEBRATE HALLOWEEN each time you receive a text message, voicemail, email, calendar reminder, or alarm
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.0
19 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 included15 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 Halloween Alert Tones - Scary new sounds for your iPhone: map the core Lifestyle 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 variety of sounds and sound packs.
Assumption to check: Limited sound selection compared to similar apps
Validate with people who use this workflow before building.
Hypothesis 2
Implement a sound preview feature before users add to favorites.
Assumption to check: No preview option for sounds before adding to favorites
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the purchase flow and provide clearer descriptions of sound packs.
Assumption to check: In-app purchase experience is confusing
Validate with people who use this workflow before building.
Hypothesis 4
Introduce features that allow users to customize alert settings and sound combinations.
Assumption to check: Lack of user customization options
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
CELEBRATE HALLOWEEN each time you receive a text message, voicemail, email, calendar reminder, or alarm. Personalize your phone with CUSTOM HALLOWEEN ALERTS. +CUSTOMIZE ANY OF THE FOLLOWING ALERTS 1.New SMS /TXT message arrived 2.New Voicemail arrived 3.New Email arrived 4.New calendar reminder 5.New alarm 6.Email sent 7.Tweet sent +TONS OF ALERTS INCLUDED Spooky sounds, evil laughs, chainsaws and weapons of torture, soundtracks of impending doom, venomous bats, ominous owls, classic horror, modern horror, and more. Start personalizing your iPhone alerts +UNLIMITED DOWNLOADS Download this app once, and you can download an UNLIMITED number of alerts to customize your device with. You will NOT be charged each time you download a tone. Save money +CUSTOM SMS ALERTS FOR EACH FRIEND (BONUS) Set a unique SMS alert for each of your contacts so you can HEAR who just sent you a message. Safe and convenient while you are on the go and don’t have time to look at your iPhone. Compatibility note: To customize your alert sounds, you must be running iOS 5.0 or later.
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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BUILD KIT DIFFICULTY
Intermediate
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.
