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.
Low Poly Synth is a generator of melodic atmospheric sounds with billions of unique timbres.
$0.99 · 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 Low Poly Synth: 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 options and presets
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Difficult to create complex patterns
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No sharing options for created music
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Steep learning curve for beginners
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.
Low Poly Synth is a generator of melodic atmospheric sounds with billions of unique timbres. The app is built on modified synthesis algorithms from Fractal Bits, Relic Waves, and Relic Flow, with the addition of pure tone generation code. The sound space is divided into 4294967296 presets, each corresponding to a set of 8 sample textures. The volume of an individual sample can be adjusted in the top panel or via MIDI (Settings -> MIDI Mapping). The bottom panel is a classic musical keyboard that sets the note for the sounds in the set. Each note triggers all 8 samples at once - together they form a complex harmonic pattern that almost never repeats over time due to the different lengths of the looped fragments. Features: * search for new sounds with three buttons: next random set, edit code, previous set; each set of 8 sounds corresponds to a code of 8 characters (you can save/copy/paste it as plain text); * three types of keyboards for live performing: on-screen, PC keyboard, MIDI input; for the on-screen keyboard, you can set the number of displayed octaves and scale; * 20+ parameters can be controlled via MIDI or directly through the app interface: Settings -> MIDI Mapping; * real-time audio recording to WAV (32-bit); * export to: WAV (one file or a set), SunVox (samples + effects in one file), text clipboard; * the LCK button freezes individual samples - they will not change during the search for new sets; * Audio Unit Extension (AUv3), Wi-Fi export/import. Double clicking on a parameter opens a window for setting the exact value. If you enable the Hold option, the notes will play endlessly, without reacting to key release (noteOff) events; turning the note on again works like turning it off; there are two ways to enable this option: 1) using the Hold parameter in the "MIDI Mapping" window; 2) by pressing the HOLD button, which appears in place of LCK while playing the musical keyboard: press HOLD, release the desired notes - then the released notes will continue to play.
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.