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
Solar Snap
Everything you need for the next solar eclipse, all in one app! Introducing Solar Snap: a camera filter + app combo that can help you take amazing photos of the sun, whether there’s an eclipse, or any other day
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
6,450 ratings · Top 15%
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 Solar Snap: 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
Expand editing options to include more filters and adjustments.
Assumption to check: Limited editing features compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Optimize app performance for lower-end devices.
Assumption to check: Occasional performance issues on older devices.
Validate with people who use this workflow before building.
Hypothesis 3
Provide clearer descriptions of premium features and pricing.
Assumption to check: In-app purchase confusion regarding premium features.
Validate with people who use this workflow before building.
Hypothesis 4
Integrate social media sharing options for easier photo sharing.
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
Everything you need for the next solar eclipse, all in one app! Introducing Solar Snap: a camera filter + app combo that can help you take amazing photos of the sun, whether there’s an eclipse, or any other day. Simply attach the filter to your phone, open Solar Snap, and snap away! Solar Snap also includes an interactive, offline global solar eclipse simulator, with detailed information and times to prepare you for the next eclipse, no matter where you are, where you are going, even if you don't have a signal! Solar Snap can be used with our Solar Snap filter kit available at: https://www.eclipseglasses.com/products/solar-snap-the-eclipse-app. This filter protects your phone camera from damage by the bright sun. You may optionally re-use old eclipse glasses by cutting a pair in half and taping it over your camera lens. Video instructions by Astronomer Doug Duncan included in the app. Total solar eclipses are crossing Europe and the Middle East in 2026 and 2027. Get ready!
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
Redux
expo-camera
@react-native-async-storage/async-storage
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.
