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.
During a routine mining expedition in the outer regions of the galaxy five mysterious boxes of unknown origin were found
$4.99 · 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 rymdigare: 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 offline functionality
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Weak search capabilities
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inconsistent playback controls
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Simple playlist management
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.
During a routine mining expedition in the outer regions of the galaxy five mysterious boxes of unknown origin were found. Rumours among the workers spread quickly that there was a strange feeling being around these boxes, as if time flows in a different way, not just forward but sometimes also folding back on itself. The miners nicknamed them, the five boxes of reverberation. After the excavation process, to study them more closely, it was decided to transport them back to earth. Rymdigare is part reverb, part noise and drone machine, part quality degrader and part wave shaper. The reverb is built from 5 reverberation boxes where you can control the sound with length and ratio parameters, tail and weight skew parameters and an internal feedback parameter, that could be used to create swelling tails. There is also a built in octave shifter, resonant filter, speed and level degrader and 4 LFO sources for modulating a selected set of parameters, including the LFO speeds themselves. The app can run stand-alone, connecting to other apps through Inter App Audio or AudioBus or it can run as an AUv3 plugin. Map and control any parameter with MIDI using Core MIDI, Bluetooth MIDI, Inter App Audio MIDI or AUv3 MIDI. + Resonant filter (low, band or high pass) + Noise and drone machine + Level and speed degrader + Wave shaper (input and output gain) + Reverb (length, ratio, skew, tail, feedback and type: free, bpm, tuned) + Reverb random variation controls + Octave shifter up and down + Planet orbits (LFO: double tap on parameter controls to map) + Inter App Audio, AudioBus and AUv3 + Map Midi CC using Core MIDI, Bluetooth MIDI, IAA Midi or AUv3 MIDI.
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.