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
EarMemo: Offline Audio Player
EarMemo is a local-first audio player for iOS, designed for long-form listening: podcasts, audiobooks, lectures, and voice recordings.
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included18 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 EarMemo: Offline Audio Player: map the core Books 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
Enhance offline capabilities with better file management and organization.
Assumption to check: Limited offline features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Introduce themes and play settings for a personalized experience.
Assumption to check: Lack of user customization options
Validate with people who use this workflow before building.
Hypothesis 3
Implement sharing options for playlists or audio files with friends.
Assumption to check: No social sharing functionality
Validate with people who use this workflow before building.
Hypothesis 4
Add support for high-quality audio formats to attract audiophiles.
Assumption to check: Poor audio quality in some formats
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
EarMemo is a local-first audio player for iOS, designed for long-form listening: podcasts, audiobooks, lectures, and voice recordings. Listen slowly. Bookmark anywhere, write notes anytime — your notes outlive the audio, because what you thought matters more than the file. No cloud, no algorithm, no tracking. Your audio lives only on your device. —— Built for long-form · "Continue Listening" is always one tap away — remembers every chapter, every episode · Bookmarks and notes anchored to exact timestamps · Serif typography on warm Cocoa cream — reading-grade typesetting for audio Native iOS, in full · Live Activity + Dynamic Island for playback and sleep timer · Home Screen widgets · Siri / Shortcuts — play, pause, skip, bookmark with your voice · Lock Screen, AirPlay, Bluetooth — complete remote control · VoiceOver, Dynamic Type, Dark Mode Yours · Fully offline. No account. · Zero data leaves your device. · Complete Privacy Manifest. · One-time purchase. No subscription.
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
zustand
react-native-async-storage
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.
