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.
Mil-Calc is a fast, modern distance milling calculator designed for shooters who want analog ranging capabilities without outdated slide rules, cluttered charts, or mental algebra.
$1.99
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.
Your first Build Kit is free with a verified email.
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.
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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Mil-Calc is a fast, modern distance milling calculator designed for shooters who want analog ranging capabilities without outdated slide rules, cluttered charts, or mental algebra. Using a known target size and a MIL or MOA measurement taken through your optic, Mil-Calc aids you in calculating the distance to your target in yards or meters. All calculations are performed locally on your device with a clean, focused interface built for real-world use. Key Features • Distance milling using MIL or MOA • Supports imperial and metric units • Clean, distraction-free interface • Built-in reference sizes for common targets • Fast, offline calculations — no internet required • No ads, tracking, or analytics How It Works Select or enter a known target size Measure the target through your scope using MIL or MOA Enter both values and tap Calculate Receive an instant distance calculation Accuracy depends on correct inputs — precise measurements produce the best results. Reference Section Mil-Calc includes a reference library of common average and standardized sizes to assist when a target’s exact dimensions are unknown. Examples include: • IPSC targets • Animal vital zone measurements • Standardized objects such as building materials and traffic signs Reference values are approximations but are often close enough to be useful in practical scenarios. Privacy Mil-Calc does not collect, store, transmit, or share any personal data. No analytics, tracking systems, or third-party services are used. All settings and calculations remain entirely on your device. Important Notes • All results are estimates based on user input • Always confirm distance when safety is a concern • This app does not replace professional training • Users are responsible for complying with all applicable laws Mil-Calc is designed for lawful recreational, educational, and sporting use. Designed and Engineered in the USA by Americans.
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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.
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.
Not assessed in a Build Kit yet.
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.