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
Double View - Dual Recording
Introducing Double View!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
14 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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Build Kit
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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.
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
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Double View - Dual Recording: 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 smoother transitions and controls for easier camera switching.
Assumption to check: Difficulty in switching between cameras during recording
Validate with people who use this workflow before building.
Hypothesis 2
Introduce basic editing tools like trimming and adding filters.
Assumption to check: Limited editing features for recorded videos
Validate with people who use this workflow before building.
Hypothesis 3
Optimize video quality settings based on device capabilities.
Assumption to check: Inconsistent video quality across devices
Validate with people who use this workflow before building.
Hypothesis 4
Clarify premium features with better onboarding and descriptions.
Assumption to check: User confusion over premium features
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
Introducing Double View! Dual Recording & Photo Capture The ultimate photo & video capture tool. Amazing for content creators & everyday users too! Gives you Instagram + YouTube formats of the same subject at the same time. Double View captures with two lenses simultaneously, giving you both portrait (Instagram/vertical) and landscape (YouTube/horizontal) formats of the same images & video scenes. Never miss a moment because you had to turn the camera. Shorten your shooting time because you only have to capture it once. With dual screen preview mode, you can easily see what each format is capturing to ensure you're getting what you need. Automatic color matching works to ensure both images are consistent with each other. Camera Modes Photo Mode — Captures a 4:5 portrait + 5:4 landscape pair. Video Mode — Records 9:16 vertical video + 16:9 horizontal video simultaneously. Choose 24fps or 30fps. Controls Guide • Shutter — Tap to capture photos or start/stop video • Flash — Cycle through off, on, and auto • Zoom — Use an independent slider on each preview window • Gallery — View all your captures in an organized layout Free Trial & Unlimited Usage Free Trial - 3 days to try it out. Double View Subscription - Unlimited captures. $4.99/mo. or save with Annual option. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.doubleview.com/privacy
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.
SUGGESTED BUILD STACK
React Native
Expo
Zustand
expo-camera
react-navigation
react-native-video
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.
