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.
This app is designed after a very popular exercise taught by a world famous music education guru in the Boston area
$5.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Politonus I (Ear Training): map the core Music workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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
Assumption to check: Limited exercise variety leads to user boredom
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Inadequate tracking of progress over time
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Difficult navigation structure
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: High cost of app may deter new users
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
This app is designed after a very popular exercise taught by a world famous music education guru in the Boston area. Many generations of musicians from all over the world traveled to Boston and waited in a two-year waiting list to access this information and now it is available to everyone at a low price. It will help anybody significantly improve their aural skills. From beginners to professionals, this is a great workout for your ears. Hear from 1 to 11 notes at the time relative to any major key, diatonically or chromatically. Select whether you want to see notes by name, degrees or movable do. It's fun, it includes flexible options, it's very easy to use and extremely effective. Now you can train and open up your ears anytime, anywhere! If you stick to it it will build up your perceptions all the way to near perfect pitch. Politonus keeps track of your progress and tells you when you've reached a master level in the current settings so you can confidently move on to a more complex ear training workout (Both note streak and accuracy circles will turn green). Politonus includes a coach with a powerful algorithm for relative and/or perfect pitch that acts as an ear training tutor. It presents progressive exercises and allows you to step up to a harder level when you are ready. With Politonus you'll have a great ear training teacher anywhere! You will not regret this purchase.
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.