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
DuetCam
With DuetCam and the release of the newest operating system from Apple, iOS 13, you'll be able to record videos using two cameras at the same time and save it to the device, share it online or even upload it directly ...
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.2
27 ratings · Below Average
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 DuetCam: 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
Offer advanced editing tools and filters.
Assumption to check: Limited editing capabilities compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Optimize app for lower-end devices.
Assumption to check: Inconsistent performance on older devices
Validate with people who use this workflow before building.
Hypothesis 3
Integrate direct sharing to social media platforms.
Assumption to check: Lacks social sharing features
Validate with people who use this workflow before building.
Hypothesis 4
Provide more value in the premium version to justify the cost.
Assumption to check: Watermark on free version is a deterrent
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
With DuetCam and the release of the newest operating system from Apple, iOS 13, you'll be able to record videos using two cameras at the same time and save it to the device, share it online or even upload it directly to Instagram Stories. ** IMPORTANT: this app requires the iPhone XR, iPhone XS, iPhone XS Max, iPhone 11, iPhone 11 Max, iPhone 11 Max Pro or the iPad Pro with A12 chip or better to be able to use 2 cameras simultaneously. This app features: * recording with two cameras, the front-facing camera and any back-facing camera your device offers * videos are saved directly to your library, similar as to the stock camera app * apply digital zoom using any of the available lenses * change the position of the PIP image while recording * switch front and back cameras while recording * browse your videos within the app * play videos and share them without leaving the app * share your videos as an IG story directly from the app If you have any issues using the app please contact me at [email protected]. Future versions will include multiple camera layouts, effects and other interesting features. Make sure you have automatic updates on to be the first getting all the new stuff that's coming.
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
react-navigation
expo-camera
@react-native-async-storage/async-storage
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.
