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
HarmoWave
Smart photo cleanup and album manager — local-first privacy.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 3.3
319 ratings · Below Average
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 HarmoWave: map the core Productivity 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
Add advanced features like reminders, recurring tasks, and better project management.
Assumption to check: Limited features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the navigation and provide clearer icons.
Assumption to check: User interface can be confusing
Validate with people who use this workflow before building.
Hypothesis 3
Implement more reliable cloud sync options and improve error handling.
Assumption to check: Syncing issues with cloud services
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize themes and layouts.
Assumption to check: Lack of 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
Smart photo cleanup and album manager — local-first privacy. Sonic Cleanup Use multi-frequency sonic cleaning to help clear dust and water from your device speakers. A simple guided routine gets your speakers sounding clearer — no extra tools needed. What HarmoWave does • Find similar photos using perceptual pHash matching, grouped into Photo Series for easy review • Detect duplicates and highlight Best Shots so you can free up storage • Score images on clarity, redundancy, and overall quality — Excellent, Good, Fair, or Needs Work • Organize your library on a smart timeline by month or year, with media-type filters and On This Day moments • Spot blurry photos with Quick Captures and browse large files in HD Collection • Create and manage custom albums with drag-and-drop sorting and fast access to favorites • Get storage insights, weekly trends, and smart cleanup suggestions Privacy & security • All analysis runs locally on your device — your photos are never uploaded • Minimal permissions only — we never collect or sell your photo data Learn more Terms: https://sites.google.com/view/harmonic-terms Privacy: https://sites.google.com/view/harmonic-privacy
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.
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BUILD KIT DIFFICULTY
Advanced
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.
