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
Guru Maps Pro - Offline Nav
Explore the world offline with Guru Maps Pro — detailed maps, turn-by-turn navigation, and GPS track recording that keep working when you have no signal.
$89.99 · In-app purchases
PRICE
$89.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
995 ratings · Top 5%
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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included18 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Guru Maps Pro - Offline Nav: 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
Implement faster download and caching for offline maps.
Assumption to check: Users report issues with offline maps loading slowly
Validate with people who use this workflow before building.
Hypothesis 2
Enhance search capabilities with more filters and categories.
Assumption to check: Users find the search function limited
Validate with people who use this workflow before building.
Hypothesis 3
Improve routing algorithms for better accuracy.
Assumption to check: Navigation can be inaccurate in rural areas
Validate with people who use this workflow before building.
Hypothesis 4
Conduct thorough testing and optimize performance for stability.
Assumption to check: Frequent app crashes during navigation
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
Explore the world offline with Guru Maps Pro — detailed maps, turn-by-turn navigation, and GPS track recording that keep working when you have no signal. Download maps once and use them anywhere (powered by OpenStreetMap). Plan routes, record adventures, save favorite places, and sync everything across devices. OFFLINE MAPS • Download maps for countries or regions and use them fully offline. • Rich detail and millions of places. Monthly map updates. NAVIGATION THAT WORKS OFFLINE • Voice-guided, turn-by-turn directions with automatic rerouting. • Lane guidance for clearer driving in complex junctions. • Modes: car, bike, truck, walk, plus straight-line navigation (great for sailing or off-road). ROUTE PLANNING • Build multi-stop routes with custom waypoints. • Choose fastest or shortest route and save your plans. • Export routes to GPX/KML to share or back up. TRUE 3D RELIEF & TERRAIN • Preview hills and valleys in True 3D Relief. • High-detail terrain: contour lines, hillshade, and topographic overlays. • Elevation profiles and slope charts for smarter planning. GPS TRACK RECORDING • Record tracks with one tap (even in the background). • Live stats: speed, distance, time, altitude. • Analyze tracks with interactive graphs and export to GPX/KML. FAST OFFLINE SEARCH • Search by name, address, category, or coordinates — offline. • Instant results as you type, with multi-language support. POI & ORGANIZATION • Save places with custom pins and icons. • Organize everything into folders and share with friends. OPENING HOURS • See opening hours for places when available. SYNC ACROSS DEVICES • Sync and back up your markers, tracks, and collections with one Guru Maps account across iOS, macOS, and other platforms. CARPLAY • Use Guru Maps on Apple CarPlay with offline maps and voice directions. NO ADS. PRIVACY FIRST. • No advertising. Your location stays on your device. Power features: one-finger zoom, compass & scale, coordinate grids (MGRS/UTM), GeoJSON overlays, MBTiles/sqlitedb import, and more. Download Guru Maps Pro and explore with confidence — anywhere, anytime with: • Unlimited offline map downloads • Unlimited markers and GPS tracks • Pro map sources, including Satellite and specialist layers (cycling, outdoors, marine, ski, etc.) Terms of Service & Privacy Policy: https://gurumaps.app/terms_of_service Continued use of GPS running in the background can dramatically decrease battery life.
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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
Supabase
react-navigation
@react-native-community/geolocation
react-native-maps
BUILD KIT DIFFICULTY
Advanced
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.
