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.
hearEQ builds your EQ skills to professional levels using custom ear training exercises, created just for you from your favorite songs
$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 hearEQ: Ear training for EQ: 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 free exercises may deter new users
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Users find it difficult to track their progress
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of social sharing features
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchase structure may confuse 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.
hearEQ builds your EQ skills to professional levels using custom ear training exercises, created just for you from your favorite songs. Simple, powerful, and fast, hearEQ is perfect for ear training on the go. Named one of "The best iPhone and iPad apps for musicians" (www.apppicker.com), here's what the experts have to say about hearEQ: "When I found hearEQ, I knew this was a game-changer. From the ease of use and the ability to use your own music selections, hearEQ is perfectly designed to be the go-to choice for developing your ear. My students have shown tremendous improvements in mixing and productions, and I completely attribute this to hearEQ. Thanks Ten Kettles! Keep up the great work. You are making a difference!" -Chandler Bridges, Ph.D., Professor (The Los Angeles Film School); Audio engineer (Will Smith, Aaliyah, Johnny Mathis, P-Diddy, J-Lo, Bette Midler, LeAnn Rimes, and more) with two Grammy-winning albums. “After half an hour with the app I had a noticeable improvement to my score, but I was also thinking in much clearer terms too!” -Tim Webb, www.discchord.com “This handy app is one of the greatest tools I've seen for helping you hear exactly how EQ adjustments affect your sound. Wish I would have had this when I was first learning how to mix live sound.” -James Wasem, www.greatchurchsound.com "hearEQ…makes the experience of ear training enjoyable enough to seem like fun. [It's] a great educational tool." -Tom Flint, Sound on Sound: The World's Best Recording Technology Magazine “The principle behind hearEQ is beautifully straightforward…even with a little repetition, things do start to improve and I suspect if you were to build some hearEQ into your daily musical routine, you would soon reap some positive benefits.” -John Walden, www.musicappblog.com ---------------------------------- Every frequency range has a color, a quality, a character. For sound engineers, musicians, and other enthusiasts, knowing how to apply this to an equalizer (EQ) can make a transformational change to your sound—whether you're mixing a live concert, a recording, or even playing music through iTunes. (VIDEO @ www.hearEQ.com) It's a simple app with a powerful promise: if you learn the qualities of each frequency band—for example, cutting 4kHz puts sound in the background—then you can make equalization work for you, and truly transform your sound into something professional and beautiful. hearEQ uses your favorite songs on your device to create custom ear training exercises that a) teach you all about frequency bands, and b) help you really hone your EQ skills. A standard 10-band or 30-band* equalizer is used, just like you'd find in iTunes and on many professional sound mixers. Your song will be played back with a simple equalization applied—and you guess what it was! > Was it really clear, maybe a bit hollow? Could be a 1000 Hz cut. > Was it muddy? Maybe that's a 500 Hz boost. > Was it really present, almost too in-your-face? Sounds like a 4kHz boost. Ten questions, ten frequencies, and then you get a score. Want to focus on just a few frequency bands to start? You can do that too. Keep at it, and you'll be an EQ master in no time. Want to learn more? Check out our site and the hearEQ video at www.hearEQ.com. *The 30-band equalizer is part of the "Advanced EQ" module, available as an in-app purchase within hearEQ. NOTE: hearEQ works with any track on your device, with the exception of tracks that prevent our EQ processing, such as DRM-protected tracks and cloud tracks (e.g., Apple Music). That said, hearEQ ships with several built-in practice tracks, so you'll be able to start EQing right away! TERMS OF USE: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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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.