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.
MainStage lets you take your Mac to the stage with a full-screen interface optimized for live performance, flexible hardware control, and a massive collection of plug-ins and sounds that are fully compatible with Logic Pro.
$29.99 · 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 MainStage: 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 user reviews and support documentation
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: High price point for casual users
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Complex interface for beginners
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of social sharing capabilities
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.
MainStage lets you take your Mac to the stage with a full-screen interface optimized for live performance, flexible hardware control, and a massive collection of plug-ins and sounds that are fully compatible with Logic Pro. The Ultimate Live Rig • Perform live with 100 instrument, effect, and MIDI plug-ins or work with Audio Units plug-ins • Add your sounds from Logic Pro and GarageBand to bring your studio sound to the stage • Support for the Touch Bar on MacBook Pro provides convenient controls for layout, editing, and performance • Combine instruments and live audio, such as keyboards and vocals, in a single Patch • Switch between Patches without stopping sound output or cutting off held notes • Design rich keyboard Patches using splits and layers, the Arpeggiator, and other MIDI plug-ins • Perform with stereo or multitrack backing tracks using Playback • 64-bit architecture uses all the RAM in your system for larger sampled instruments Hardware Control • Connect your favorite hardware and use it to play and control your plug-ins • Use USB and MIDI-equipped controllers like keyboards, foot pedals, and drum pads • Instantly set up a large variety of hardware using automatic device recognition • Quickly assign hardware knobs, buttons, and faders to onscreen controls • Manage sophisticated rigs using the Assignments & Mapping overview Designed for the Stage • See only what you need during your performance using a customizable, full-screen live interface • Screen controls adapt for each Patch using Smart Controls • Smart Controls offer dynamic performance controls that change with each Patch • Easily view your Mac screen from a distance using a high-contrast, full-screen performance view Instrument Plug-ins • Play or create a wide variety of rich sampled instruments with Sampler and Quick Sampler • Turn your favorite hardware synthesizers into sampled instruments using the Auto Sampler plug-in • Quickly find sounds or create unique new ones with Alchemy, the ultimate sample manipulation synthesizer • Play classic ’70s- and ’80s-style synthesizer sounds using Retro Synth • Play faithful models of vintage keyboards with Vintage B3, Vintage Electric Piano, and Vintage Clav • Perform inspired sounds using a collection of synths that provide analog, wavetable, FM, additive, granular, spectral, and modeling synthesis • Play deeply sampled, professionally mixed, and fully customizable drum kits provided by Drum Kit Designer • Perform electronic beats with the Ultrabeat drum machine MIDI Plug-ins • Transform simple ideas into elaborate performances using nine MIDI plug-ins • Instantly turn a simple chord into a rich performance with the Arpeggiator • Play a single note to trigger predefined chords with Chord Trigger • Perform a part and conform notes to a specific scale using Transposer Creative and Production Effects • Play your sounds through a variety of realistic acoustic spaces or creative synthesized reverbs • Use a range of multi-tap, vintage tape, and stereo delays • Add movement to your tracks with a variety of modulation effects • Get the perfect mix with a collection of vintage and modern EQs, dynamics, and other mixing tools Guitar and Bass Gear • Build your own guitar or bass rig with Amp Designer using vintage and modern amps, cabinets, and mics • Design a custom Pedalboard from a collection of delay, distortion, and modulation stompboxes • Access a full-screen Tuner to quickly get in tune Sound Library • Over 5,900 instrument and effect patches • 1,200 meticulously sampled instruments • 14,750 Apple Loops in a wide range of genres Storage Requirements • 6GB available disk space for minimum install / 72GB hard disk for full Sound Library installation
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.