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.
My Moon Phase is the best app for tracking the lunar calendar
Free · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for My Moon Phase - Lunar Calendar: 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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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
Assumption to check: Limited data on moon phases for specific locations
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No notifications for moon phase changes
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchases can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: UI can feel cluttered
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
My Moon Phase is the best app for tracking the lunar calendar. It has a sleek dark design which makes it easy to view information such as the current moon cycle, moonrise & moonset times as well as extras such as when the next full moon will be. If you're interested in moon photography, you can also find out when the golden hours and blue hours are so you can take the most beautiful photos. - View the moon cycle for any date in the future by scrolling on the date bar or by tapping the calendar button! - Either allow the app to use your current location or manually select a location of your choice to use! - See how cloudy the sky is expected to be on upcoming days so you can work out whether you'll be able to see the moon or not! - Find the upcoming moon phases straight on the main screen - you'll instantly know when the next full moon, new moon, first quarter and last quarter are. - Golden hour and blue hour times are available to allow you to calculate when to take photos. - More specific information is available such as the moon's distance from Earth, the age of the moon as well as the current altitude. This is available for any date on the lunar calendar. - Receive notifications when the moon reaches a particular phase of your choice. - Optimized for the latest iPhone and iPad models. - Completely free of charge for all functionality, no in-app purchases. If you want the most efficient way of keeping up with the lunar calendar and the current moon phases, then My Moon Phase is the right app for you. This version is ad-supported and is similar to apps such as Deluxe Moon Pro and MoonX.
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.