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
Chimani: National Parks
Apple Editor's Choice • Apple App of the Day
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
1,157 ratings · Top 15%
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's included17 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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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 Chimani: National Parks: map the core Travel 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
Provide downloadable content for offline use.
Assumption to check: Limited offline access to park information
Validate with people who use this workflow before building.
Hypothesis 2
Optimize map loading times and interactions.
Assumption to check: Map functionality can be slow
Validate with people who use this workflow before building.
Hypothesis 3
Improve clarity and visibility of subscription benefits.
Assumption to check: Subscription options are unclear
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate user forums or community features for park enthusiasts.
Assumption to check: Limited user engagement features
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
Apple Editor's Choice • Apple App of the Day Discover why Apple selected Chimani as both an Editor's Choice app and App of the Day. Whether you're planning your first national park vacation or your fiftieth, Chimani is the complete national park trip planner, travel guide, and offline GPS companion for exploring America's most beautiful places. Plan unforgettable adventures with intelligent trip planning, GPS audio tours, offline maps, expert-written guides, and a community of fellow travelers—all designed to help you explore confidently, even when cell service disappears. Discover the best hikes, scenic drives, waterfalls, wildlife, overlooks, campgrounds, visitor centers, and hidden gems across thousands of parks. Intelligent Trip Planner Build a personalized itinerary in seconds based on your travel style. • Scenic drives or challenging hikes • Wildlife, waterfalls, photography, history, and culture • Kid-friendly adventures • Accessible experiences • Sunrise and sunset recommendations • Interactive trip maps • Offline itineraries Perfect for weekend getaways, cross-country road trips, and national park vacations. Park Assistant Your personal park expert—even offline. Ask questions before or during your trip: • Where's the closest restroom? • What's the best easy hike nearby? • Where should I watch sunrise? • What's worth seeing today? Get fast, practical answers wherever your adventure takes you. GPS Audio Tours Turn every drive into a guided experience. • Automatic narration as you approach landmarks • Stories about geology, wildlife, history, and culture • Hands-free exploration • Perfect for scenic drives Offline Maps & GPS Download everything before you lose service. • GPS trail maps • Scenic drives • Campgrounds • Visitor centers • Parking • Overlooks • Offline travel guides No signal required. Trip Sharing Plan together with family and friends. • Share complete itineraries • Collaborate on stops • Keep everyone synchronized • Perfect for family vacations and group trips Chimani Community Learn from travelers who've recently visited. • Tips for specific locations • Trail and road updates • Photos • Comments • Share your own discoveries Live Park Alerts Stay informed during your visit. • Trail closures • Road closures • Weather alerts • Wildlife activity • Parking updates • Crowd information Powered by official park information and the Chimani community. Expert Travel Guides Professional travel writers help you experience each park like a local. • Hidden gems • Must-see attractions • History • Geology • Wildlife • Seasonal recommendations • Accessibility • Pet information • Safety tips Explore Thousands of Parks Discover every U.S. National Park plus thousands of: • National Monuments • State Parks • National Forests • Wildlife Refuges • Recreation Areas Explore iconic destinations including Yellowstone, Yosemite, Grand Canyon, Zion, Glacier, Acadia, Great Smoky Mountains, Rocky Mountain, Olympic, Joshua Tree, Bryce Canyon, Arches, and hundreds more. Chimani+ Upgrade your adventures with: • GPS Audio Tours • Offline maps • Offline guides • Unlimited Park Assistant • Trip collaboration • Ad-free experience $34.99/year Subscriptions automatically renew unless canceled at least 24 hours before the end of the current billing period. Good to Know • Create trips, bookmark places, check in, share adventures, and join the community by signing in. • Continued GPS use in the background may reduce battery life. • Support: [email protected] Terms: https://www.chimani.com/termsofservice.html Privacy: https://www.chimani.com/privacy.html
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
axios
react-native-maps
shadcn/ui
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.
