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
Cuspart: Altimeter+
Transform your phone into a professional-grade outdoor instrument
$2.69 · In-app purchases
PRICE
$2.69
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included15 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 Cuspart: Altimeter+: 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 social sharing for altitude records.
Assumption to check: Limited user engagement due to lack of features
Validate with people who use this workflow before building.
Hypothesis 2
Implement more robust location and altitude fetching algorithms.
Assumption to check: Inconsistent accuracy of altitude readings
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to download altitude maps for offline use.
Assumption to check: Lack of offline functionality
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a free tier with limited functionality to attract more users.
Assumption to check: High price point for basic 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
Transform your phone into a professional-grade outdoor instrument. Cuspart is the definitive all-in-one toolkit for hikers, trail runners, and adventurers who demand precision, reliability, and mission-critical data in a single, powerful interface. Master your environment with a comprehensive suite of tools designed for serious exploration. ADVANCED NAVIGATION & MAPPING • Real-Time Route Tracking: Record your hike, run, or trek directly on the map. Analyze your performance, save your favorite paths, and never lose your way. • Professional Compass Suite: Go beyond basic north. Choose from 7 specialized compass types to navigate like a pro, whether you're using a simple magnetic heading or advanced military-grade grids. • Essential GPS Dashboard: Instantly view your precise coordinates, current speed, and exact street address in a clean, easy-to-read display. • Dual Map Modes: Seamlessly switch between detailed Standard and photorealistic Hybrid maps to get the perfect perspective on your terrain. PRECISION ENVIRONMENTAL SENSORS • Altimeter & Barometer: Monitor your ascent with a highly accurate elevation sensor and predict weather changes by tracking barometric pressure trends. • Complete Weather Dashboard: Get live, location-based intelligence, including Temperature, Humidity, Precipitation probability, Wind Speed, Wind Direction, and Cloud Cover percentage. • Strategic Sun Planning: Don't just get local sun times. Tap anywhere on the map to instantly see the precise sunrise and sunset times for a future destination, summit, or campsite. Perfect for planning your start and finish. ESSENTIAL SAFETY & UTILITY SUITE • Geo-Tagged Photo Logs: Capture memories that matter. Every photo automatically embeds location coordinates, address, and time data, creating a rich visual log of your journey. • One-Tap Emergency SMS: In a critical situation, send a pre-configured message with your exact coordinates to your emergency contacts with a single press. • Loud SOS Siren & Flashlight: Attract attention when you need it most with a piercing SOS alarm and illuminate your path with a powerful, easily accessible flashlight. CUSTOMIZABLE UNITS Adapt your dashboard to your preferences. Cuspart allows you to easily change the units for four key measurements: elevation, coordinates, speed, and barometric pressure. BUILT FOR THE DATA-DRIVEN ADVENTURER Cuspart is for anyone who values robust, reliable data—from weekend hikers and trail runners to serious mountaineers and campers. Ditch the clutter of single-purpose apps. Download Cuspart today and carry a complete dashboard of professional outdoor instruments in your pocket. Weather data provided by the Met Norway API. App icon created by Freepik – Flaticon
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
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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.
