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.
ECHOCAT is the iPhone and iPad companion for POTACAT, the desktop app for amateur radio operators chasing Parks on the Air (POTA), Summits on the Air (SOTA), Worldwide Bunkers on the Air (WWBOTA), Tiles on the Air and DX
$9.99 · 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.
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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 ECHOCAT - Ham Radio Remote: 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 functionality compared to dedicated ham radio equipment
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Complex setup process for new users
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Potential connection issues over Wi-Fi/Bluetooth
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of user feedback options
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.
ECHOCAT is the iPhone and iPad companion for POTACAT, the desktop app for amateur radio operators chasing Parks on the Air (POTA), Summits on the Air (SOTA), Worldwide Bunkers on the Air (WWBOTA), Tiles on the Air and DX. Connect your iPad or iPhone to your shack computer from anywhere in the world. POTACAT Cloud Tunnel (optional subscription) handles the remote connection with no router config, no port forwarding, and no VPN setup — it’s the easiest path. If you prefer to bring your own networking, ECHOCAT also works over Tailscale, WireGuard, or 44NetConnect. On your local network, ECHOCAT works out of the box for free. From any of these paths you have comprehensive remote control of your shack, allowing you to work all your favorite modes. Remote SSB, CW, FT8 and SSTV! Imagine you're stuck in that long line at the supermarket and you get a notification your buddy is on a summit. Just open up ECHOCAT, QSY to their frequency and call them on single side band with the Push to Talk button. Or send a CW Macro. Or connect your TinyMIDI from N6ARA and send them your fist. Snap a photo and mock up a quick SSTV and bounce it off the ionosphere. Or my most used mode - chase rare DX on FT8 (and FT4 and FT2) when you wake up in the middle of the night for a quick run to the powder room. It's really that easy -- then log it all with one click. Slick! Select the entities you want to chase (POTA, SOTA, DX Clusters, WWFF, LLOTA, Tiles on the Air) and the region you want to see (North America, South America, Europe, etc), and enjoy two views: SPOTS View - See all the spots in a nice, large view showcasing the operator's callsign, name, distance from your QTH, mode and park/summit MAP View - See a beautiful map with pins at all the activating spots. Click a spot to see their callsign, 1-click tune to them by pressing "QSY" and work the contact on SSB or CW. DIRECTORY view shows a list of current and upcoming HF nets, as well as Short Wave Listening (SWL) stations. Now you can tune into a net on a long drive and chat with your buddies, or catch the latest from Voice of Turkey. By utilizing the SDR connection, you can connect ECHOCAT to your favorite KiwiSDR or WebSDR so you can listen to spots and nets even when your shack rig is unavailable. POTACAT CLOUD (OPTIONAL SUBSCRIPTION) Subscribe to POTACAT Cloud to back up your logbook and sync QSOs between your phone and every desktop you operate from. Built for activators in the field, contesters with portable stations, and anyone with more than one shack. + POTACAT Cloud Tunnel — remote rig control from anywhere on the internet, no VPN required + Guest Pass — issue a time-limited, owner-revocable code that lets another licensed operator drive your station for a contest, a club session, or remote help. Server-enforced TX power and band limits + Cross-device QSO sync — log on mobile when your desktop is offline, watch it appear when you get home + Cloud backup with full ADIF export + Settings sync between devices + Multiple computers, one canonical log + Widgets to embed on QRZ that show your latest activation, total QSOs and more 73s, K3SBP Subscriptions: POTACAT Cloud is an auto-renewable subscription. Monthly and annual plans are available; pricing is shown at purchase. Subscription auto-renews unless cancelled at least 24 hours before the end of the current period. Payment is charged to your Apple ID at purchase confirmation. Manage your subscription in your Apple ID account settings. Free trial converts to a paid subscription unless cancelled at least 24 hours before the trial ends. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://api.potacat.com/privacy-terms.html Support: https://api.potacat.com/support
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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.