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.
Create music with Loopy HD by layering looped recordings of singing, beatboxing, or playing an instrument with a savvy, sophisticated, tactile looper that totally reinvents the formula
$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 Loopy HD: Looper: 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 library options
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: Performance issues with large loops
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No collaboration features
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.
Create music with Loopy HD by layering looped recordings of singing, beatboxing, or playing an instrument with a savvy, sophisticated, tactile looper that totally reinvents the formula. As seen on The Tonight Show Starring Jimmy Fallon. https://loopyapp.com -- “This is the best loop station on the iPhone” -- Dub FX (dubfx.net) -- “I pretty much own every mobile looper out there and Loopy is HANDS DOWN the best. Super simple interface with powerful features.” -- J. Alan Meier -- “If you want a recording app that will get out of the way and just let you be creative, you just found it.” -- Dave Merson-Hess, indie film composer -- “Loopy 2 is by far the best looper for the iPhone we’ve seen to date” -- iOS Recording Compatible with the Audiobus app: Record and loop live audio directly from other Audiobus-compatible apps! While other music creation apps tend to be either powerful but difficult to learn, or easy to use but limited in features, Loopy doesn't compromise. Loopy offers a sleek, expressive, instantly understandable interface that beginners can start using effectively straight away. It's fun, right from the start. More advanced users, however, will not be disappointed by Loopy's rich feature set, with extra features many other loopers just don't have. Plus, a sophisticated interactive tutorial system lets users discover Loopy's more advanced features at their own pace. RECORD & LAYER - Six, nine, or twelve beautifully rendered circular loops, with simple yet powerful controls. - Count-in, count-out and record chaining lets you keep your hands free to play an instrument. - MIDI control, to control Loopy via foot pedal or other controller. - Overdub, to build beautiful, complex soundscapes from many layers. - Support for tracks of any multiple or fraction of a beat, for flexible and expressive looping. - Sophisticated audio or visual metronome to keep you in time - no matter what time signature you choose. - Perfectly synchronized, low latency audio engine. - Robust MIDI clock receive and send, and support for Ableton Link. IMPORT & CONSTRUCT - Import loops from your computer via iTunes, with support for AIFF, WAV, MP3, M4A, CAF and more. - Bring in audio from many other audio apps with integrated audio copy and paste. - Imported loops are automatically fit to your beat, no matter what tempo. MANIPULATE & TWEAK - Full stereo audio, with pan controls for each track to create custom stereoscapes. - Fix up timing by twisting tracks around to line up the beat, or make funky sound effects with dynamic time shifting. - Drag a track onto another track to merge tracks, and clear up a space. - Live, dynamic tempo adjustment to speed up or slow down your creations, without altering the pitch. - MIDI clock sync, to play in time with other MIDI-capable devices or apps. PERFORM & SHARE - Record whole performances with in-app session recording facilities. - Upload performances or single loops straight to SoundCloud, and post to Twitter or Facebook. - Email audio clips. - Share audio with many other audio apps with audio copy and paste. - Transfer loops or performances to your computer via iTunes. ----- Loopy is developed by one guy who loves making great apps, and who is dedicated to responsive development and support. Please contact me with questions, bug reports, feature ideas, and other feedback at [email protected] or https://forum.loopyapp.com. I may be able to fix your issue in less time than it would take to write a negative review!
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.