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.
App Overview
BeatCut - Sampler for Video
BeatCut — Play Video Like an Instrument
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
6 ratings · Top 5%
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.
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A product spec, screen plans, and build steps for your coding agent.
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What's included18 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for BeatCut - Sampler for Video: map the core Photo & Video workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Implement guided tutorials for first-time users.
Assumption to check: Poor user onboarding experience
Validate with people who use this workflow before building.
Hypothesis 2
Expand library and allow users to upload their samples.
Assumption to check: Limited audio sample options
Validate with people who use this workflow before building.
Hypothesis 3
Add collaborative editing features for multiple users.
Assumption to check: Lack of real-time collaboration features
Validate with people who use this workflow before building.
Hypothesis 4
Optimize video rendering and editing performance.
Assumption to check: Performance issues with large projects
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
BeatCut — Play Video Like an Instrument BeatCut is a tap-to-remix video performance app. - Chop videos into playable pads - Perform visuals in real time - Record your jam as a finished video — synced to your music. - AUv3 audio plugin extension. Inspired by sampler instruments, BeatCut turns video into something you play, not edit. Play Mode: Perform Live - Tap pads to instantly trigger video chops - Loop, hold, reverse, or ping-pong playback - Smooth per-pad transitions - Perform fullscreen with pads overlaid on the video - Designed for one-handed, thumb-friendly performance Edit Mode: Shape Your Chops - Assign clips to pads - Define chop start and end points - Adjust playback speed and duration - Choose per-pad play modes: - Trigger or Hold - Loop - Ping-Pong - Reverse - Apply visual FX per pad: - Flip horizontal / vertical - Color styles (B&W, Negative, Posterize, Sepia) - Scale modes (Fit, Fill, Stretch) - Transition styles: - Fade In - Slide In (from left, right, top, or bottom) Import & Trim Video Clips - Pick videos directly from your device - Trim clips with a dedicated trimmer (up to 60 seconds per clip) - Import multiple clips into a single project - First clip is auto-chopped across all pads for instant playability - Drag and drop support Add a Backing Audio Track - Import a music track from Files - Trim and preview audio before performing - Audio plays independently from video playback - Perfect for syncing visual performance to music - Drag and drop support Record Your Performance - Record exactly what you perform — pads, FX, speed changes, and loops - Backing audio is mixed into the final video - Exported video is saved directly to Photos - Share instantly Project Management - Save, duplicate, and organize projects - Projects are stored locally as lightweight files - Media is managed automatically per project Built for Performance - No timelines - No layers - No keyframes Ideal for: - Visual performers & VJs - Musicians & producers - Content creators & remix artists - Anyone who wants to turn video into a playable instrument BeatCut — tap, remix, and perform video in real time.
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Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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BUILD KIT DIFFICULTY
Advanced
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.
