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
Sun Surveyor (Sun & Moon)
Sun Surveyor takes the mystery out of the sunrise, sunset, and moon phases, allowing photographers and filmmakers to scout the best locations, plan effectively, and get the perfect shot.
$9.99 · In-app purchases
PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
281 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.
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/
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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 Sun Surveyor (Sun & Moon): 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
Allow users to customize colors and styles for the solar path.
Assumption to check: Limited customization options for solar path visualization
Validate with people who use this workflow before building.
Hypothesis 2
Provide clear explanations and previews of premium features.
Assumption to check: In-app purchase confusion
Validate with people who use this workflow before building.
Hypothesis 3
Optimize backend data fetching and processing.
Assumption to check: Performance issues with real-time data updates
Validate with people who use this workflow before building.
Hypothesis 4
Introduce options to share captured photos directly to social media.
Assumption to check: Lack of social sharing 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
Sun Surveyor takes the mystery out of the sunrise, sunset, and moon phases, allowing photographers and filmmakers to scout the best locations, plan effectively, and get the perfect shot. The Live Camera View, Interactive Map (with Street View), 3D Compass, and detailed Ephemeris provide a wealth of information about the largest natural light source in the galaxy, as well as the moon, and milky way: - View augmented reality projections of the sun and moon paths, pinpoint the time the sun or moon will be at a particular location in the sky - Predict and plan for the golden hour, blue hour and every sunrise, sunset, moonrise and moonset - Prepare night photography shots with the Milky Way & star trail features Solar Industry (PV) Professionals, architects, real estate agents, and gardeners will also find a wealth of empowering interactive features: - Show clients the quality and quantity of seasonal sunlight at a given location - Understand potential shade of surroundings and discover any obstructions - Create images of the summer and winter Solstice & Equinox paths for a site Additional features: - Photo Opportunities - an interactive listing of critical times to help inspire and generate shot ideas; including the full moon looming low in the sky during magic hour, total darkness for stargazing, and more - Position Search - an extremely powerful tool to search for sun, moon and milky way center positions within various constraints, for the perfectionist planner - Widgets - plenty of configurable widgets for your home screen and today view (iOS 14+) - Visual time machine - take a quick glance at the light for a day, or dial in desired compositions easily - Moon distance, age, apogee, perigee, super moon predictions - Sun shadow information - calculate the length of shadows cast by objects - Helpful video tutorials show how to use all of the app's modules and how to shoot specific types of scenes - Share details and locations with clients and colleagues - Offline usage (excludes Map View, Street View) - enter coordinates, save & load locations with no data connection or GPS available - Measure distance, and difference between elevations, and vertical angle differentials with the Map view - Import and export Google Earth .kmz/.kml locations - Magnetic declination compensation - "Today" Widget - (for the pull-down notification center) shows rise and set times for the current location and the next upcoming sun event - Languages: English, Deutsch, Français, 日本語, Italiano, Español, Català, русский, Norsk (Bokmål), Dansk, Nederlands, 中文 (繁體), 中文 (简体), 한국어, čeština, Türkçe, Português (Portugal & Brasil), Polski
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
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expo-camera
expo-location
victory-native
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.
