App Overview

Chopper: Video/Audio Shortener icon

Chopper: Video/Audio Shortener

Shuichi Tsutsumi · Photo & Video

this app can automatically remove silences in your video/audio by detecting human voice using ai

$1.99 · In-app purchases

PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.1
21 ratings · Top 30%

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 included16 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.

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.

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

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for Chopper: Video/Audio Shortener: 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

Add more advanced editing tools like filters and effects.

Assumption to check: Limited features compared to full editing suites

Validate with people who use this workflow before building.

Hypothesis 2

Implement a guided tutorial for first-time users.

Assumption to check: Can be confusing for new users

Validate with people who use this workflow before building.

Hypothesis 3

Provide clearer export formats and settings.

Assumption to check: Export options can be unclear

Validate with people who use this workflow before building.

Hypothesis 4

Optimize app performance for handling larger media files.

Assumption to check: Occasional performance issues with larger files

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

this app can automatically remove silences in your video/audio by detecting human voice using ai. it can be used for audio, too. good for youtube, podcasts, etc. --------------------------------- how good the ai based silence removal is? --------------------------------- conventional silence cutters (based on audio levels) cannot cut out noise, rustling, etc. this app's ai (deep learning) technology identifies only the "human voice" and can remove those unnecessary parts. --------------------------------- all is done on-device! --------------------------------- all processing is done on the iphone/ipad, so you can use it offline. no data is sent to the server, so you can rest assured of security and privacy. --------------------------------- how to use --------------------------------- just select a video and tap the "export" button! --------------------------------- features of chopper --------------------------------- - "cut level" (the strength of the cut) can be adjusted in three levels. - you can choose the export quality. - supports not only video but also audio files. - you can also extract the audio from the video. - you can also reduce the size (capacity) of the video. select "medium quality".

Written user reviews are not shown here. Check current App Store reviews >

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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React Native
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@supabase/supabase-js
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.