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.
More Powerful Than Ever, Quickly Turn Your Ideas Into Music
$39.99 · 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 KORG Gadget 3: 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: High price point for average users
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Steep learning curve for beginners
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited gadget variety compared to competitors
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Occasional crashes on older devices
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.
More Powerful Than Ever, Quickly Turn Your Ideas Into Music KORG Gadget 3 - A Complete, Seamlessly Integrated Music Production Ecosystem KORG Gadget has received numerous awards from around the world: • Apple: "App Store Best of 2014" in Japan • #1 in the Top Paid Music iPad App category* • TECH AWARD 2015 "Best Music Production App" • MusicTech's "Gear of the Year: Best App" Gold Award • “Musikmesse international press award 2016” Mobile Music App * USA, UK, Japan, Germany, France, Italy and much more! KORG Gadget is the ideal all-in-one music production software and plug-in suite featuring over 40* small synthesizers/drum machines (“gadgets”), which can be freely combined to create music driven by a powerful yet intuitive user interface. The range of products includes the award-winning iOS version, a Mac version that includes all functions and plug-ins, and a plug-in version that can be used with your favorite DAW on Mac/PC. Now in its third generation, more powerful than ever, the workflow is now more intuitive and easier to use than ever before and there are plenty of new features and new gadgets. KORG Gadget 3 offers an expanded variety of even more features to quickly turn your ideas into music, including two new gadgets, five insert effects (IFX), a new genre select system, and AUv3 support. In addition, the user interface has been brushed up to make the Gadget Browser, IFX page, and Play page even more intuitive. KORG Gadget 3 is the perfect tool to quickly turn your ideas into music. What's New in KORG Gadget 3 • Gadget Instrument Collection with a total over 6,000 sound programs • New gadgets: Santa Ana (Guitar) and Sydney (Sampler) • Improved user interface, making the workflow more intuitive than ever • A genre select function that allows you to create songs from your favorite patterns • 5 new IFX including an 8-Band EQ, Transient Shaper, Stereo Image, Auto Pumper, Pitch Shifter • The Play page: easy arpeggiator use and chord entry • A whole new sound browser that lets you select gadgets by the timbre you want • AUv3 support on iOS, allowing gadgets to be used in other music apps like Garageband, Logic Pro • A huge collection of over 40* gadget instruments Overwhelming sound. Immersive, intuitive and powerful user interface. Unprecedented and innovative quality. KORG Gadget 3 is a collection of over 40* gadget instruments, including compact synthesizers, drum machines, samplers, and audio and MIDI utilities. It has sophisticated parameters that make it easy for you to get to the sound they want, so you can create your own sounds instantly. The new Sound Browser allows you to get to your favorite sounds in the quickest time possible. It is perfectly suited for dance music as well as rock, pop, jazz, and other music sounds and genres. • Get your songwriting ideas with Genre Select The new "Genre Select" feature allows you to select your favorite genre and sound, and then start songwriting by freely combining patterns. 5 x 5 pads are all assigned with phrases created by gadgets, so you can start songwriting by freely combining your favorite patterns. You can start creating a song from a project in which each track's gadgets and scenes have been developed. Choose from the standard genre packs and enjoy a different approach to music production. • Tons of sounds readily available with the New Browser To make it easier than ever to find the desired gadget instrument, we have revised the Gadget Browser and added various functions. New features include displaying gadgets by instrument category, a Favourites function that allows you to group your favorite gadgets, and a search function that allows you to freely search for sounds in each gadget. Using the program search function, it is now possible to quickly and easily preview and search for the sound you wanted from a vast array of sounds. * Some gadgets are available as in-app purchases (IAP) or by purchasing other KORG apps. More info at korg.com
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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.