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.
SpotterCall is the spotter in your ear
$19.99 · 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 SpotterCall: map the core Sports 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: Difficulty in finding local events.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited team interaction features.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: High subscription cost.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Poor user onboarding experience.
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.
SpotterCall is the spotter in your ear. Say the distance — hear your hold. Elevation and wind, in MRAD or MOA. Eyes stay downrange, hands stay on the rifle. Built by shooters, for one thing above all: EASE OF USE. VOICE IN. VOICE OUT. This is the difference. Other apps make you type and read. SpotterCall is a conversation: say "Hey Spotter, 800 yards," and a clear, natural voice answers with your firing solution in seconds — in your earbud or off the bench speaker. Distance echoed back with every call, so you always know it heard you right. Range gone quiet? Tap the distance instead. Either way, you never break position to squint at a screen. And the voice watches your gear, too. Kestrel drop its Bluetooth link mid-string? SpotterCall TELLS you — out loud — and keeps calling on weather fallback so you're never shooting blind on stale data. No other ballistics app talks to you like a spotter. Because no other ballistics app is one. LIVE SENSORS OVER BLUETOOTH Pair your Kestrel weather meter and your solutions breathe with real conditions — temperature, pressure, humidity, density altitude, live at the bench. Add a Wind Zero downrange wind sensor and you're reading wind where the bullet flies, not just where you sit. Vane-mount your Kestrel and get live wind direction on the dial. With sensors connected, your calls carry the wind: hold with drift and drop together, and watch speed, direction, and flow move live on screen between shots. No sensors today? SpotterCall falls back to local weather automatically and keeps calling. MY GEAR Your gear bag, remembered. SpotterCall saves your Kestrel and wind sensors by name and reconnects to the right unit every time — no re-pairing ritual at every match. BRING YOUR PROFILES WITH YOU Already built your loads in another ballistics app? Export the range card and import it straight into SpotterCall — your proven dope comes with you. Or type in three numbers and let the built-in G7/G1 solver build the table. MORE RIFLES, NOT MORE FEES Other apps meter you to a handful of profiles. SpotterCall starts you with 10+ ready-to-shoot reference profiles from the built-in MAST library and lets you build and import your own on top. Your safe has more than three rifles in it. So does your app. TRUING THAT WORKS THE WAY YOU SHOOT True at distance with TRUE MODE — enter actual impacts on the dope card and lock in range-verified corrections. Watching your chrono mid-string and the average moves? Adjust muzzle velocity in two taps and every distance updates together. Your truing persists until YOU change it — no surprises thirty minutes later. RANGE CARDS — THE PLACES YOU SHOOT Set up three named ranges: your home range with its exact target distances, the match course, the deer stand — big oak at 250, food-plot edge at 485. Load the yardages once, glance at every hold at once. Nothing to re-enter, nothing to call out. PRIVACY, PLAINLY No account. No ads. No tracking. Your profiles and your dope live on your device. Speak the Distance.
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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.