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.
LastLight gives you precise sunset and last usable light times right on your Lock Screen and Home Screen—so you never miss the perfect moment.
$0.99 · 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.
Kit ready. Verify your email to download it.
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.
JavaScript is required to complete mailbox verification.
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for LastLight Pro: Sunset Tracker: map the core Weather workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Affiliate link: CloneChart may earn a commission at no extra cost
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 location options for sunset tracking
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No severe weather alerts
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Basic UI design
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of community features
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.
LastLight gives you precise sunset and last usable light times right on your Lock Screen and Home Screen—so you never miss the perfect moment. WHAT MAKES LASTLIGHT DIFFERENT Most apps just show sunset. LastLight goes further by calculating the exact moment when outdoor light becomes truly unusable—what we call "Last Light." This carefully calculated time tells you when you need to wrap up outdoor activities, set up camp, or head home before darkness sets in. Whether you're a photographer chasing perfect light, a hiker planning your trail time, or someone who simply wants to make the most of daylight—LastLight delivers the precision you need. DESIGNED FOR LOCK SCREEN & HOME SCREEN LastLight was built specifically for iOS widgets, giving you instant access to critical timing information without ever opening an app. Lock Screen Widgets: - Rectangular widget below the time—your main glanceable display - Four independent circular widgets: First Light, Sunrise, Sunset, and Last Light - Perfect for Always-On Display on iPhone 14 Pro and newer Home Screen Widgets: - Small, Medium, and Large sizes - Beautiful sunset icon with customizable color (15 color options) - Clean, readable design that complements any Home Screen aesthetic HIGHLY CUSTOMIZABLE Every widget can be personalized to match your preferences: Display Options: - Choose what to show: First Light, Sunrise, Sunset, or Last Light - Three configurable lines—show only what matters to you - Hide or display individual time points Alignment Control: - Lock Screen: Adjust vertical and horizontal positioning - Home Screen: Center or left-align text - Fine-tune every widget independently Bold Font Options: - Make important information stand out - Customize which lines use bold text - Three intensity levels: Bold, Bolder, Boldest - Different settings for Lock Screen vs Home Screen widgets Icon Customization: - Choose from 15 vibrant colors for the sunset icon - Match your wallpaper or personal style PERFECT FOR EVERY OUTDOOR ACTIVITY Photographers: - Know exactly when usable light disappears - Never waste time waiting for darkness that's already arrived Hikers & Campers: - Calculate remaining daylight for trail navigation - Time your arrival at camp before darkness - Plan activities around actual usable light—not just sunset Outdoor Enthusiasts: - Coordinate evening activities with precision - Maximize daylight for outdoor projects - Safe planning for activities requiring natural light Daily Life: - Know how much daylight remains after work - Plan evening walks or runs - Time outdoor chores and activities FOUR PRECISE TIME POINTS: - First Light: The moment usable morning light begins - Sunrise: When the sun crosses the horizon in the morning - Sunset: When the sun crosses the horizon in the evening - Last Light: The moment when outdoor light becomes unusable All times are calculated with scientific precision for your exact location and automatically account for your timezone, daylight saving time, and seasonal variations. NO SUBSCRIPTIONS. NO TRACKING. NO ADS. Just $0.99 once. You own it forever. LastLight respects your privacy—all location calculations happen on your device. We don't collect, track, or sell your data. Ever. WHY CHOOSE LASTLIGHT: - Purpose-built for iOS Lock Screen and Home Screen widgets - Shows critical "last usable light" time—not just sunset - Exceptionally customizable—make it yours - Scientifically precise calculations - Beautiful, clean interface - Works anywhere in the world - One-time purchase—no subscription required - No ads, no tracking, complete privacy - Supports iOS 18 and iOS 26 - Regular updates and improvements Perfect for photographers, hikers, campers, outdoor workers, and anyone who needs to know exactly when usable daylight ends. Download LastLight today and never miss the last light of the day.
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.