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.
Co-designed with Berlin-based electronic musician Hainbach, Gauss brings the oldschool tape-looping art form to mobile devices
$6.99 · 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 Gauss Field Looper: 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 audio editing features compared to professional software.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: User interface may feel cluttered for beginners.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchases can be confusing and feel forced.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lacks community features for sharing loops.
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.
Co-designed with Berlin-based electronic musician Hainbach, Gauss brings the oldschool tape-looping art form to mobile devices. This creative field looper works both standalone and as an Audio Unit effect plugin and puts the possibilities of using looped tapes in your hands. Without the need for scissors. Like real tape loops Gauss takes you off the grid of your DAW: you can adjust tape speed and direction, even during recording. The flow of your loops will drift organically as the tape follows its own cyclical timeline. Use overdub, or even multiple instances of the Audio Unit plugin, to create multi-layered ever changing sonic palettes. We want this app to be a celebration of digital audio technology, so when audio quality is degraded it will do so in a pleasingly crunchy digital way. For example, recording on low tape speeds will give you longer recording time, but at the cost (or pleasure) of a distinctively lower recording quality. So Gauss mimics the behaviour - not the sound - of magnetic tape. Set the length of the tape, record and overdub your audio, play around with tape speeds; Gauss captures the essence of two ends of tape stuck together in all its unsynchronised, free-running glory. There's even a unique built-in 4-step polyrhythmic sequencer for sequencing tape-speed changes. - designed as a standalone field recorder and an Audio Unit effect plugin (AUv3) in one package - universal app: plugin and standalone work on all iDevices, iOS11 and higher - variable tape speed; seamlessly change direction and speed during playback or recording - 4-step sequencer lets you trigger (polyrhythmic) tape-speed changes in sync with your host tempo - variable inertia for the tape drive motors (from instant to very slow speed changes) - built-in multi-mode filter with LFO modulation - delay effect with optional host-sync mode - “1989” mode uses a special 8 bit/11KHz tape head for a last-century vintage digital sound - 45 seconds maximum loop size at 1x speed, proportionally longer at lower speeds (.e.g 90 seconds at half speed, etc.) - overdub at any speed or tape direction - plugin supports global cross-host preset handling (requires iOS13+, compatible AUv3 host) Find the user manual at ruismaker.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.