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.
op-1 field is perfect...
$9.99 · 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 op1 lfo hero: 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: Complexity of LFO controls can overwhelm new users
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited effects options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Performance issues with background audio playback
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of social sharing options
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.
op-1 field is perfect.... almost. it needs more lfos. op1 lfo hero uses midi magic to create custom lfos, modulating parameters to the beat of your music (or not). pick a thingy to lfo — volume, pan, mute, fx, more exciting words — pick a curve and speed, and let your ears enjoy. make music fun. that's about it. it's mildly fantastic, just like your face. stuff it does: · creates external lfos for all tracks and the master bus · plus some things op1 doesn't give a way to control without external help .... · did you know you can make a tempo lfo? now you do · you can even create lfos for lfos. it's lfos all the way down! · a satisfying number of curves · sync to the beat or free time (just like op1 speed) · loop, one-shot, invert.... and more terms that only audio nerds care about · tempo modes: midi sync (app sends clock) & beat sync (op1 sends clock) · midi connections over usb-c or bluetooth (ble) stuff it doesn't do: · include an op-1 field - consider it a $2000 upgrade to this app! · save any files · explain the magic of midi or what "lfo" means · create sound, record audio, generate melodies, or do anything else remotely useful without an op1 attached · pick the waveform for you — choose your own adventure, bruh · fix your timing or inability to carry a tune · your laundry requirements: · teenage engineering op-1 field — incompatible with the original, until proven otherwise · iPhone or iPad — iOS 17.6+ · apple silicon mac — macOS 11 big sur or later · usb-c or bluetooth ble for midi connections https://andrewralon.github.io/op1-lfo-hero/privacy.html https://andrewralon.github.io/op1-lfo-hero/support.html
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.