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.
Zodiak Echo faithfully recreates the spacious tape delay and spring reverb combo that ruled the airwaves since its introduction in 1974
$14.99 · 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 Zodiak ECHO Delay & Reverb: 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 effects compared to desktop software
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: In-app purchase confusion
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Performance issues with multiple effects
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.
Zodiak Echo faithfully recreates the spacious tape delay and spring reverb combo that ruled the airwaves since its introduction in 1974. Its combination of analog tones, trippy quirks, and organic modulation effects helps you unleash an immense variety of room-filling retro sounds. Augmented by a wide number of modern parameters, Zodiak Echo can cover anything from delicately timed ping-pong delays to twisted aural psychedelia -- at times even morphing into a unique meta-instrument by itself. • Virtual tape delay & spring reverb with unique tonal response • Recreates the operational properties and quirks of the famous 1970s effects unit • Realistic tape saturation and tape modulation effects • 3 independent delay heads • Dedicated delay time, panning & gain per head • Tempo syncing with wide variety of note values • Adjustable Intensity control capable of self-oscillation • Custom Bass/Treble delay EQ • Smooth tape speed changes for realistic speed-up/slow-down effects • Two unique spring reverb models • Adjustable reverb dwell / decay time • Reverb panning • Series or parallel reverb signal path selector • Adjustable tape frequency response • Independently adjustable tape wow and flutter • Vari-Amp control for amplitude modulation • Special preamp option with saturation and saturation tone control • Adjustable delay head drift • Custom presence control • Mono-summed delay line input option • Stereo or mono-summed feedback selector • Dry mute switch • Echo send switch for delay trails • Configurable tape rate change response time • Independently adjustable tape hum and hiss, with master tone control • Tape Age parameter for changing tonal and modulation characteristic • Easy MIDI Learn with over 40 MIDI-controllable parameters • Over 140 factory presets featuring a wide variety of delay effects • Standalone app and AUv3 plugin are included • Compatible with iPhone, iPad and Macs powered by Apple Silicon • Part of Yonac Zodiak professional audio plugin series
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.