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.
A Synth With A Soul
$19.99 · 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 BA-1 - Baby Audio: 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 sound customization options
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: High price compared to competitors
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No collaborative features for projects
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Complex UI for new users
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.
A Synth With A Soul * Baby Audio's popular BA-1 synthesizer is now available on the App Store * Use it in standalone mode to instantly play and program lush 80s patches that are dripping with color * Or use it as an AUv3 Plugin in your favorite host – such as Logic Pro, GarageBand or Cubasis Whether you're creating synthwave, lo-fi, modern pop or dance, BA-1 will be your new go-to synth due to its authentic sonic character and user-friendly workflow. It ships with 500+ high quality presets and a Re-Gen button for instantly creating new patches on the fly. About BA-1 The Legacy: BA-1 is based on a portable 1980s synth with a toylike appearance and a gritty sound. Despite its small size, it left a big mark on music history, while still flying somewhat under the hype radar. The original has been used as a secret weapon for bubbly synth textures by some of Sweden’s most successful pop producers of the past two decades. It was also a staple of 1990s digital dancehall and beloved by the indietronica scene for its raw lo-fi quality. The original hardware has never been properly captured in software form. So for our first ever synth, we started there. The Sound: In keeping with our motto ”it’s an evolution, not an emulation”, we modeled the hardware with the greatest possible accuracy, before carefully upgrading it with new and useful features. A second analog-modeled oscillator, FM, polyphony, and more, help to vastly expand the sonic palette of the original. All while keeping its signature sound unspoiled. Additionally, BA-1 lets you drain the battery, bend the circuits, and use the built-in speaker – for an authentic lo-fi aesthetic that you could normally only get with hardware. The Effects: If you know our company, you’ll know that effects are our specialty. So we’ve treated BA-1 with an FX section worthy of its own plugin. The effects chain is inspired by budget 1980s rack hardware and captures the lo-fi charm of the home studio scene of the era. The overdrive is modeled after a guitar pedal, while the delay, reverb and chorus effects are based on cheap, but amazing, digital rack units. In BA-1, the effects are not an afterthought but an ingrained part of the sonic signature. The Simplicity: BA-1 is simple, but surprisingly tweakable. We’ve put great effort into tuning all parameters to be in the perfect sweet spot. This results in a rewarding programming workflow where tweaking BA-1 is a lot of fun and you’ll create new patches on repeat. And if a simple interface is not fast enough, you can always use the smart ‘Re-Gen’ feature. Hit Re-Gen and BA-1 will automatically create new and musically tuned patches with every click. We hope you'll enjoy this new Baby Audio release!
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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.