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.
VintageRack is a minimalistic and convenient multi-effect application that contains modules realistically modeling notable retro gear from the early digital era with their inherent aesthetics and atmosphere
$8.99 · 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.
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Combine features and design from your favorite apps.
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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 VintageRack: 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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Hypothesis 1
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Repetitive UI for playlists
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Difficult to discover new music
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchase complexity
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.
VintageRack is a minimalistic and convenient multi-effect application that contains modules realistically modeling notable retro gear from the early digital era with their inherent aesthetics and atmosphere. Most of the effects in this application have been inspired and based on the principles of actual hardware from the 70s and 80s, which is great for giving the sound of any instrument the nostalgic and emotional mood of old recordings. This application has a clean and intuitive user interface with a well-considered structure. The signal path is split into seven slots: the first for input control, the last for output, and five customizable effect modules in between. Each module features a master fader for adjusting effect presence and a mute button for smooth toggling. These parameters can be easily assigned to MIDI controls right from the main screen, improving both workflow and productivity. Smooth transitions between presets and on-screen pads for quickly switching presets that can be easily assigned to MIDI controls allow flexible effect selection during live performances or studio recordings. Another great feature of VintageRack is the ability to set a lower bit depth of processed signal, typical for early digital devices, both for the entire path and for individual modules. As with these devices, this application models pre- and post-processing of the analog signal both before and after the digital circuits with the addition of companders, emphasis and filters, which makes the sound similar to the real devices. Effect modules: - Analog modeled compressor. - Three band equalizer typical for mixing consoles. - Classic and reverse delays with modulation feature. - Two Chorus modules are precise emulations of known devices. - Two modules of Flanger with different options and tones. - Two modules of Phaser with various sound character. - Filter module controlled by LFO or envelope generator. - Faithful emulation of classic Wah effects with added automation. - Combined effect of Tremolo and Vibrato with separate rate. - Ring modulator with additional modulation of carrier. - Three types of Fuzz with modulated filters. - Emulation of one of the early digital reverbs. - Vintage exciter with bass enhancer. - Spring reverb with tube preamp. - Advanced formant filter with voice synth mode. - Input slot contains Noise gate and Automatic gain control. - Output slot contains tape-style saturation and three types of tonestacks. VintageRack is a universal application for iOS and macOS. It can work on iPhone and iPad as well as Mac / MacBook with M1 chip (and later). VintageRack works on iPhone and iPad standalone, as an Audio Unit or Inter-App Audio module, and supports Audiobus and Ableton Link. On MacOS, VintageRack can works both as a standalone application and as an Audio unit (AUv3) with DAWs and other hosts that support AUv3 plugins. All application features are available on iOS and macOS, including MIDI support (with a MIDI learn option) and audio unit parameters. VintageRack has a built-in detailed description of all parameters also available as PDF file on the application site. Demo: https://youtu.be/I3lcd5rYaBQ https://youtu.be/zmHjpFDkPLQ https://youtu.be/eqkvhDBUGPQ https://youtu.be/o79g6S5qftk You can find more information on VintageRack and other creative audio apps at: https://motion-soundscape.blogspot.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.