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.
App Overview
Ham Radio Reference
Did you hear a Q signal that you didn’t know? Want to find the local grid square? With this reference, you can not only find these, but also have quick, easy access to the following:
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.7
14 ratings · Top 50%
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Ham Radio Reference: map the core Reference workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Incorporate forums or chat features for users to share tips.
Assumption to check: Limited user engagement features like community interaction.
Validate with people who use this workflow before building.
Hypothesis 2
Add images, charts, or interactive elements to make learning more engaging.
Assumption to check: Not enough visual elements, mostly text-based.
Validate with people who use this workflow before building.
Hypothesis 3
Optimize search algorithms and implement caching.
Assumption to check: Slow response times when searching large databases.
Validate with people who use this workflow before building.
Hypothesis 4
Redesign the UI with modern aesthetics and user-centered design principles.
Assumption to check: UI feels outdated and not user-friendly.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Did you hear a Q signal that you didn’t know? Want to find the local grid square? With this reference, you can not only find these, but also have quick, easy access to the following: US & Canadian Amateur Band Limits Country Codes Band Plans (ARRL, ARC, IARU 1, 2, 3) Radiogram Numbered Messages Grid Square and Location Q Codes Local and UTC Time The RST System Morse Code The Phonetic Alphabet Unit Abbreviations Metric Prefixes In addition there are 16 useful electronic formulas with their own calculator that can be used for dB v. Power calculations, frequency v. wavelength, Ohm’s law and more! The programmers at SnecaDev (also hams) value your input and suggestions and want to continue to improve our products. You can use the Contact option in the app to send your ideas to us. Thank you for your continued support!
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
Axios
AsyncStorage
React Navigation
Zustand
BUILD KIT DIFFICULTY
Starter
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.
