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-Dot Ballistics combines fast range estimation with a full featured ballistics calculator that’s simple to use
$14.99 · 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 Mil-Dot Ballistics: map the core Utilities 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 features compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: User interface can feel outdated.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inconsistent performance on older devices.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of clear instructions for new users.
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.
Mil-Dot Ballistics combines fast range estimation with a full featured ballistics calculator that’s simple to use. Real-time calculations provide instant range estimation and ballistics calculation to get you on target fast. The simple interface allows for one handed operation and eliminates any need to manually type any measurements to range a target. Complete, detailed user manual for iPhone and iPad available at www.rangetimesoftware.com. Features: - Kestrel DROP wireless data logger integration automatically updates atmospheric conditions. - 3DOF point mass ballistics engine - 323 mil, MOA and IPHY reticle designs, including reticles from Carl Zeiss, Nightforce Optics, Kahles, Vixen Sport Optics, Premier Reticles, Primary Arms, Schmidt and Bender, SWFA, U.S. Optics, and Vortex Optics. - Two modes of Range input: Calculate range from target size and sub tension - allows you to estimate range to targets at unknown distances and Direct range input for known distance targets - Real-time solution information - Extensive bullet / cartridge library includes American Eagle, Barnes, Black Hills, Federal, Fiocchi, Hornady, Lapua, Norma, Nosler, Remington, Sellier & Bellot, and Winchester. - Support for variable BC information - Ballistics chart (Range, Elevation, Windage, Velocity, Time Of Flight, Energy) - Ballistics graph (Elevation, Velocity, Energy) - Reticle Drop Chart - Adjusts for atmospheric conditions for current and zero conditions (Density Altitude or Altitude, Pressure, Temperature and Humidity) - Get accurate local pressure using the barometer in iPhone 6 / 6 Plus - Use GPS location to set current atmospheric conditions - Fast range estimation - Moving target lead calculation - Correction for coriolis effect - Correction for spin drift - Point blank range calculation - Configurable windage / elevation hold display (mils, MOA, IPHY, clicks) - Target size presets - Second focal plane scope support - Fast windspeed / direction adjustment - Three ways to input line of sight angle (Angle in degrees, Cosine of angle, Automatic using device accelerometer) - Fast target speed adjustment - Target speed presets - Training mode (practice your range estimation skills) - Point of impact indicator - Bullet drop compensation display - Secondary solution info display for non-critical data - Create unlimited ballistics profiles - Multiple color schemes - Adjustable display brightness - Full Retina display support - Print range cards - More reticle designs coming soon, stay tuned!
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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.