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.
SKY TONIGHT is a brand-new astronomical app for exploring the sky
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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Generating… usually about a minute.
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 Sky Tonight - Stargazing Guide: map the core Reference 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 offline functionality in reference apps
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Difficulty in navigation for new users
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: Static content can become outdated
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.
SKY TONIGHT is a brand-new astronomical app for exploring the sky. It helps stargazers answer the three most common questions: ⁕ What is that bright dot in the sky? ⁕ What astronomical events can I see tonight? ⁕ How can I find the object I'm interested in? Made by the developers of Star Walk apps, Sky Tonight is a customizable stargazing tool, that is designed for users with different needs and wants. You can adjust the constellation's appearance, set a reminder for any space body configuration, explore the unique relative to observer trajectory, set up a magnitude limit to filter out space objects, and much more. SKY TONIGHT FEATURES: ► Point your device at the sky to see the real-time positions of space objects on the interactive sky map. ► Activate the Time Machine and determine the position of celestial bodies at different time periods. ► Use the augmented reality mode and see the sky map overlaid on the image from your device's camera. ► Get extended information about any sky object by tapping on its name. ► Stay updated on the latest news from the world of astronomy with the What's new section. ► Turn on the night mode to make your sky observation in the nighttime more comfortable. ► Filter the objects that appear on the sky map according to their visual brightness. ► Regulate the brightness of objects on the sky map. ► Spot dozens of asterisms along with the official constellations. ► Adjust the visible constellations and customize their representation on the screen. UNIQUE FEATURES: ◆ INTERACTIVE TRAJECTORIES RELATIVE TO AN OBSERVER Instead of the classic trajectory that shows the object’s trajectory in the celestial sphere relative to the Earth’s center, the app presents the object’s trajectory in the sky relative to an observer. A long touch on the trajectories relative to the observer will move the sky object to the selected point. While holding the touch, move your finger along the trajectory to change the time. ◆ FLEXIBLE SEARCH Make use of the flexible search — quickly find space objects, easily navigate across different objects and events’ types. Look for "stars", "mars moons", "mars conjunctions", "solar eclipse", and the app will show you all related objects, events, and articles! There are also Trending and Recent categories in the search section. The first one presents the currently most popular objects, events, or news; the second category contains objects you recently selected. ◆ FULLY CUSTOMIZABLE EVENT REMINDERS Set event reminders on any time and date not to miss a solar eclipse, a Full Moon, or a star-planet configuration you're interested in. ◆ ASTRONOMY CALENDAR WITH A STARGAZING INDEX AND WEATHER FORECAST Check out the calendar of celestial events that includes lunar phases, meteor showers, eclipses, oppositions, conjunctions, and other exciting events. Learn what astronomy events will occur this month or see what happened in the sky a year ago! Verify the Stargazing Index calculated from a Moon phase, light pollution, cloudiness, and time when an object is visible. The higher this index is, the better the observation conditions are. You don’t need several apps for your stargazing planning anymore; Sky Tonight contains all the info you need. Premium Access: * The app includes paid Premium Access. Get Premium Access to use Sky Tonight with no limits! Without the subscription, you can’t see most of the interface items in various sections such as Visible Tonight, Calendar, and Search. Therefore, you’re limited in planning and improving your observations. Premium Access will allow you to unlock all the interface items in any view and make the most of all the app’s features. Advertisements will also be removed not to interrupt your stargazing experience. Privacy policy: https://vitotechnology.com/privacy-policy Terms of use: https://vitotechnology.com/terms-of-use
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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.