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.
Thank you to everyone for keeping FrostGuard in the Top #10! Hope you enjoy the new features.
$2.99 · 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.
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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 FrostGuard: 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Thank you to everyone for keeping FrostGuard in the Top #10! Hope you enjoy the new features. FrostGuard tells you tonight whether frost will form by morning, so you know whether to cover your windscreen, take care on the roads or protect your plants. Most weather apps only forecast the air. FrostGuard works out how cold the surface you care about will get: your windscreen, the road or path, or the grass. It looks at temperature, humidity, dew point, wind and cloud hour by hour, then gives a clear Low, Moderate or High risk. Choose how you use it: • Windscreen / Emergency Response: a clear car in the morning, with advice on covering the glass. • Driving, Walking & Cycling: icy roads, paths and bike routes, including rain before a freeze. • Gardening: ground frost and frozen soil, so tender plants and seedlings are protected in time. Every forecast explains itself in plain words: how cold the air gets, how wind and cloud change the cooling, and why that adds up to your risk. • A daily alert at the time you choose • The next 48 hours on one graph, with tonight's and tomorrow night's lows • Widgets for the Home Screen and Lock Screen • Apple Watch app and complications • CarPlay: tonight's risk and what to do, on your car's screen • Nightstand mode: turn your iPhone on its side for a bedside frost clock • Made for iPhone Duo, iPad and every iPhone • Fine-tune mode: tell FrostGuard whether there was frost, and it learns your spot • 12 languages, with °C or °F and mph or km/h from your iPhone's settings Private by design: no account, no ads. Made by a UK firefighter who needed a clear windscreen when called out on a frosty night.
Written user reviews are not shown here. Check current App Store reviews >
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: Lack of user reviews and ratings that builds trust
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited features compared to established weather apps
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchase confusion
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Potential for inaccurate forecasts
Validate with people who use this workflow before building.
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.