App Overview

SUBCAM icon

SUBCAM

Daisaku Harasaki · Graphics & Design

SUBCAM is a camera that burns live captions right into your video as you shoot.

$0.49

PRICE
$0.49
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet

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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Build Kit

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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'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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Free quick prompt For a smaller starting point

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 SUBCAM: map the core Graphics & Design 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

Offer multiple export formats and customization.

Assumption to check: Limited export options for designs

Validate with people who use this workflow before building.

Hypothesis 2

Add real-time collaboration for users.

Assumption to check: No collaboration features

Validate with people who use this workflow before building.

Hypothesis 3

Include more robust editing features like filters and effects.

Assumption to check: Lack of advanced editing tools

Validate with people who use this workflow before building.

Hypothesis 4

Implement guided tutorials for new users.

Assumption to check: Poor user onboarding experience

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

SUBCAM is a camera that burns live captions right into your video as you shoot. Speak while recording and your words appear on screen in real time — and they are baked into the saved video. No editing, no exporting to another app. KEY FEATURES - Live Speech Captions On-device speech recognition turns your voice into subtitles the moment you speak — captions appear live even before you start recording. Supports Japanese, English, Chinese, Korean, and more. - On-Device Translation (iOS 18 or later) Speak in one language, caption in another. Real-time translation runs entirely on device, no internet connection required. Switch it on with one tap from the capture screen. - AI Scene Captions Point the camera at anything and AI describes what it sees, as short words or full sentences. Bring your own API key for Claude, ChatGPT, or Gemini, connect a local LLM, or use Apple Intelligence fully on device. You can even choose the exact model for each provider. - Cinematic Looks Switch between Standard, CinemaScope (2.39:1 letterbox), Cinematic tone, and Monochrome with one tap, right above the shutter. Letterbox color is customizable. - Style Captions While You Shoot Tap the "Aa" button to change caption size, position (top / center / bottom / danmaku barrage), and font — with a live preview behind the panel. Five fonts including Japanese Gothic and Mincho. - A Camera That Feels Familiar Standard camera layout: big shutter, recent-clip thumbnail, 0.5x/1x lens switch, pinch zoom, tap to focus. Non-essential controls fade away while recording so you can focus on the shot. FREE - 1080p 30fps recording (with a small #SUBCAM watermark) - All caption features: speech captions, AI captions, translation - All looks, caption styling, and fonts SUBCAM PRO (one-time purchase) - 4K and 60fps recording - HDR video - Exposure adjustment - Removes the #SUBCAM watermark Perfect for vlogs, street snaps, interviews, travel videos, language learning, and accessibility — shoot once, share immediately, captions included.

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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.

SUGGESTED BUILD STACK
React Native
Expo
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react-native-reanimated
react-native-gesture-handler
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.