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
The Best Compass
GPS Compass is your all-in-one navigation companion, combining an accurate GPS compass, real-time maps, weather updates, and live-view navigation tools in a simple and intuitive app.
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.4
94 ratings · Top 30%
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
Make this idea yours
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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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 The Best Compass: map the core Navigation 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
Add advanced features like route planning and points of interest.
Assumption to check: Limited features compared to full navigation systems
Validate with people who use this workflow before building.
Hypothesis 2
Provide a more guided calibration process with animations.
Assumption to check: Calibration can be tricky for some users
Validate with people who use this workflow before building.
Hypothesis 3
Implement a modern design with animations and responsive layouts.
Assumption to check: User interface may feel outdated
Validate with people who use this workflow before building.
Hypothesis 4
Offer offline map downloads and usage.
Assumption to check: Lack of offline functionality
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
GPS Compass is your all-in-one navigation companion, combining an accurate GPS compass, real-time maps, weather updates, and live-view navigation tools in a simple and intuitive app. Whether you're hiking, camping, traveling, exploring a new city, or enjoying outdoor adventures, GPS Compass helps you stay oriented and reach your destination with confidence. Key Features: • Accurate GPS compass with real-time heading and direction information • View altitude, latitude, longitude, and current weather conditions at a glance • Display real-time GPS coordinates and maps with nearby geographic information • Add any location as a destination and track its direction in real time • Raise your device to enter Live View mode for a more intuitive navigation experience • Clean, modern, and easy-to-use interface designed for everyday navigation Pro Features: Unlock advanced features with GPS Compass Pro: • Dual-view compass mode • Multi-destination guidance • Detailed weather information • Additional premium navigation tools Subscription Information: GPS Compass Pro is available through weekly and annual subscription plans, including a free trial where available. Payment will be charged to your iTunes Account upon confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current subscription period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription at any time through your App Store account settings. After cancellation, Pro features will remain available until the end of the current billing period. More Information: Technical Support: [[email protected]](mailto:[email protected]) Privacy Policy: https://sites.google.com/view/upls-compass-privacy-policy Terms of Use: https://sites.google.com/view/upls-compass-user-license
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
react-navigation
expo-location
react-native-maps
react-native-gesture-handler
BUILD KIT DIFFICULTY
Intermediate
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.
