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
Nebulis
Nebulis is the companion app for your Nebulis astrophotography server
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included16 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 Nebulis: 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, effects, and customization features.
Assumption to check: Limited editing options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Optimize image processing for better performance.
Assumption to check: Performance issues with large images
Validate with people who use this workflow before building.
Hypothesis 3
Implement cloud storage for user edits and projects.
Assumption to check: No cloud backup for edits
Validate with people who use this workflow before building.
Hypothesis 4
Clearly outline premium features and benefits to entice users.
Assumption to check: Unclear subscription benefits
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
Nebulis is the companion app for your Nebulis astrophotography server. Browse your entire deep-sky image library from your iPhone or iPad, plan your next observation session, and dive deep into the objects you've captured. Your Library, Your Way Browse hundreds of images organized by object, date, and type. Filter by galaxies, nebulae, or star clusters. Mark favorites, swipe through full-screen previews with pinch-to-zoom, and edit your captures right on your device. Plan Your Next Session The built-in planner shows you what's worth imaging tonight based on your location — with altitude charts, object details, and a curated "best tonight" list so you spend less time planning and more time imaging. Sky Forecast Check local sky conditions before you haul out the gear. Seeing and transparency forecasts help you decide if it's worth setting up. Explore Without a Server New to Nebulis? Browse a curated sample gallery of deep-sky objects to see what the app can do before connecting your own library. Privacy First Nebulis connects directly to your own server on your local network. Requires a Nebulis server (free) running on your local network or accessible via your home connection. Get Nebulis here -> https://nebulis.app
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
Zustand
react-navigation
@supabase/supabase-js
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.
