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 Monitor 3
At a glance you acquire the current solar and geomagnetic activity
$6.99 · In-app purchases
PRICE
$6.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.8
30 ratings · Top 50%
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 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 Solar Monitor 3: map the core Weather 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
Integrate multiple data sources for more accurate forecasts.
Assumption to check: Limited data sources for solar production
Validate with people who use this workflow before building.
Hypothesis 2
Implement a cohesive design system for a uniform look.
Assumption to check: Inconsistent UI design across screens
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize alert thresholds and types.
Assumption to check: Lack of customization options for alerts
Validate with people who use this workflow before building.
Hypothesis 4
Expand the app's data coverage to more regions.
Assumption to check: Limited geographical coverage
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
At a glance you acquire the current solar and geomagnetic activity. High resolution images of the Sun are taking your breath away. The Sun is being displayed in near real-time. Minute-by-minute updates of solar wind speed, density, sunspot number are provided. Diagrams and animations make Solar Monitor a professional tool, pushing the latest space weather alerts directly to your device. Solar wind speed is rising to 600 km/sec, then it continues to rise to 700 km/sec. Color changes from yellow to red. Push Alert: X-CLASS-FLARE! Aurora hunters hit the road. Solar Monitor is predicting a strong geomagnetic storm. This leads to spectacular Aurora Borealis lights. Suddenly: ALERT! Kp-Index=7. STRONG STORM! It will be exciting... Solar Monitor provides its users with an extraordinary experience. Rely on it, as thousands of friends of the Sun do around the world. You will be delighted to become an owner of this new advanced technology! Overview: • Live Alert System - pushing space weather alerts directly to your device • High resolution - near real-time - SDO/NASA images of the Sun • Latest space weather reports and messages • Minute-by-minute updating solar wind speed, density, x-ray flux, kp, IMF, sunspot number... • Many different diagrams with either bright or dark background • SDO/LASCO animation and much more
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
Victory Native
React Navigation
Zustand
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.
