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.
Loop'Dup is an audio clip player, sample arranger and loop sampler.
$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 LooP'Dup - AudioClip Performer: 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 audio editing features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of social sharing options
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No offline playback options
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: User interface may feel cluttered
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.
Loop'Dup is an audio clip player, sample arranger and loop sampler. Bring your loops into one app to sample jam, experiment, create live sets and absolutely have lots of fun! Loop'Dup! - Infinite beats, endless inspiration. This app was made entirely with solar power. Each track can launch a clip anytime, in-time with the master tempo. Every project contains 8 sets of 8 clips per track. One track can have up to 64 audio loops available to play at anytime. You could arrange sets as a songs and each row is a song part. Or each set arranged as a genre of clips (Beats, Bass, Synth etc) Perform a whole live -set. Arrange clips as rows or launch a clip from any set. All tracks have separate send effects levels of delay, reverb, dual filter. Track FX can be muted on or off as well as track volume. A special TempFX state can be used to freely play with FX sends then revert back to previous state instantly. Launch rows of clips simultaneously for arranging parts or scenes. Sample into a clip at anytime using bult in microphone or external USB audio device (class compliant). While sequencer is playing it samples a fixed length (chosen in settings) and starts at the nearest quantised bar (chosen in options). Choose to manually start sampling (waits for slow signal) when sequencer is not running, stop sampling manually or wait for the chosen fixed length. It can also auto-play like a looper Resample what is playing including any FX into an empty clip to bounce multiple tracks into one clip. Load audio files into a clip from the "Samples" folder located in this Documents folder. You can also use AudioCopy general pasteboard to conveniently copy audio between apps. AudioPaste directly to a clip or copy the audio from a clip and AudioPaste into another supporting app. Includes a demo project containing 3 sets of audio clips Also included are some audio loops captured from 2XB303, 7XDXFM, 7XWAVE, 6X806 and PunkGen with some other drum loops to help get you started jamming. The included audio loops are electro synth based. Manually set an audio clip settings: Sample duration from 8 to 128 steps (sixteenths), Reverse, Stutter effect, Auto pitch to adjust pitch to fit length of clip or manually transpose for one-hit samples, Gain override, Loops count (how many times a loops a clip will repeat), Next-Clip ( auto launching a different clip loops have finished). Send MIDI out clock to external MIDI synths, drum machines or grooveboxes so they play in time while also sampling them. You can, for example sync to the Roland MC101/MC707 via USB and send MIDI clock while sampling the MC101/MC707 own audio back into loopD'up Up to 10 projects can be loaded at once and you can export consolidated projects or import backed up projects into a project slot. 3 Different metronome modes to help you sample in time. Latency setting to compensate for microphone delays. Ableton Link to sync with other apps. IAA to route audio into Audiobus, AUM or other supporting apps to process live audio or sample. Loop it. Layer it. Love It! Loop'Dup - Your pocket sized Studio! Specs: Time synced Delay FX speed . Auto play after sampling option. Launch quantize settings from 16 steps to 128 steps. Clip length options from 8,16,32,64,128. 8 Sets A - H per project. 8 Clips per each set. 64 Audio clips per track can be loaded. Ableton Link sync. USB audio device support up 44.1k or 48k only (class compliant). USB MIDI device support (class compliant). MIDI out sync. Audio latency adjust up to 100ms IAA Audio output. Memory efficient disk streaming of audio. Auto normalise option (default) 10 projects loaded at any time. Monitor audio in option. To get audio files from outside your device into the app you can transfer audio using airplay, iCloud or usb and copy into the samples folder located in this app's documents folder. You can access this folder using Apple's Files application. Any problems be sure to contact via the email link in information
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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.