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
DoF plus
DoF plus is a "must have" application for all digital camera owners.
$0.99
PRICE
$0.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 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 included15 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 DoF plus: 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 more filters and adjustment tools to enhance user creativity.
Assumption to check: Limited features for advanced editing
Validate with people who use this workflow before building.
Hypothesis 2
Implement cloud saving for user projects to prevent data loss.
Assumption to check: No cloud backup options
Validate with people who use this workflow before building.
Hypothesis 3
Add social sharing features to increase user engagement.
Assumption to check: No sharing options for edited images
Validate with people who use this workflow before building.
Hypothesis 4
Provide themes and layout customization to improve user experience.
Assumption to check: Basic interface with limited customization
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
DoF plus is a "must have" application for all digital camera owners. DoF plus will answer questions like: - how to ensure that model face will be sharp when shot at 5m? - which focal lens I must use when shooting a person at 10m? a small bird at 50m? - how to maximize image sharpness when shooting landscapes? DoF plus is highly customizable: - select your camera model. Computations will take into account camera specifications. - define your own list of focal lenses from a list. - define your own list of apertures from a list. DoF plus provides following features: DoF (depth of field) Set focal lens, f/stop and focus distance. Near and far focus distances will be computed automatically HyF (hyperfocal) Set focal lens and f/stop. Hyperfocal distance will be computed automatically. Note: when you focus at hyperfocal distance, image will be sharp from half this distance to infinity. FoV (field of view) Set focal lens and focus distance. Field of view (width and height) will be computed automatically.
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
Supabase
react-navigation
expo-image-picker
react-native-reanimated
BUILD KIT DIFFICULTY
Intermediate
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.
