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.
Theory and Ear Training in one slick package
$4.99 · 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 Music Theory Pro: 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
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Inconsistent user interface design
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of community features
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Difficult navigation structure
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.
Theory and Ear Training in one slick package. 130,000 downloads! Top musicians practice....a lot. If you are serious about mastering theory and ear training, this app is designed to make practicing fun! You will be presented with a note, key signature, interval, chord, scale, or tempo. Your challenge is to identify what you see or hear as quickly as possible to earn high scores and beat other people who are playing around the world. If you prefer, you can simply play on your own and you'll never be forced to post your scores. Whether you’ve just started learning music, or are looking for something challenging, MTP has what you need. For Beginners: Note Naming Games Key Signatures Interval Ear Training Beginner mode for Note Names, Key Signatures and Interval ear training For Pros: Competitive Games- post your score to compete worldwide Ear Training Chords– inversions, open voicings Ear Training Scales – Modes, Western Scales, Blues, Whole Tone, Pentatonic, etc. Jazz Chords and Scales – Altered Dominants, extended chords Music Theory Pro is also available for apple computers in the mac app store. With every activity and exercise you can alter the challenge level by turning the harder answers off, and working on the basics or by flipping them all on for maximum difficulty. See what others think about this amazing app! User Reviews: “I survived my first year of music theory with this, and am still constantly using it this year as well. It is nicely customizable and easy to use. There's a lot of material is covers. I absolutely love the ear training. It has been invaluable. Looks nice, too! This is the app to buy for Music Theory class.” – Whitney Huskey “I love this app. It also has some challenging ear training exercises. I have bought a lot of music theory apps and this one is my favorite for theory” – Hadrian7 Beginners quickly become Pros Users who are just learning music will be able to practice naming notes on the piano and on the staff. Sharpen your ears The ear training section provides many challenges for the more advanced student. It takes a sharp ear to identify altered dominant chords and modal scales quickly. For jazz musicians we’ve included the modes from the melodic minor scale and all kinds of extended chords. There is even a tempo quiz to identify beats per minute by assigning a number to a click track. Increase your skills by competing with others Various exercises propel you to higher scores, which you can post to compete for top ratings. Who will be #1 in the world this month? Could be you! “This app is great. I have gone from having absolutely no knowledge in Music Theory, to doing very well in all of the categories the app offers. Thank you very much for helping me learn Theory finally and making it fun.” – whoisjk Download Music Theory Pro and start becoming a better musician today! Dr. Joel Clifft
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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.