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
Elevation Tracker: Altitude
Track your altitude
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
120 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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
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 Elevation Tracker: Altitude: 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 offline maps and tracking without internet
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to share their routes and stats with friends
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Enhance UI with more engaging visuals and animations
Assumption to check: Basic UI design
Validate with people who use this workflow before building.
Hypothesis 4
Ensure real-time updates with smoother transitions and accurate data
Assumption to check: Inconsistent update frequency for elevation data
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
Track your altitude. Map your routes. Relive your adventures in 3D. A precise GPS altimeter and complete trip recorder for hiking, biking, skiing, paragliding, or any outdoor adventure where altitude matters. Live tracking • Real-time altitude with vertical accuracy • Distance, elevation gain & loss, average speed, stopwatch • Live Activity & Dynamic Island support — keep your stats on the Lock Screen • Background tracking, so your trip keeps recording in your pocket On the map • Switch between satellite, hybrid and standard map styles • Colored polyline along your route • Tap any point to see altitude, distance and speed at that exact spot Your trips, saved & shared • Trip history — every session stored locally on your device • Import GPX files as a ghost trace to follow a route on the map • Export your tracks as GPX (Pro) • Snapshot and share your map view with one tap 3D flyover videos (Pro) Turn your favorite hike into a cinematic 3D flyover video — your route, your camera path, your altitude stats burned in. Export to your Photos library and share it everywhere. 100% local, 100% private — no account, no cloud sync, no analytics. Your data stays on your device. Works offline. Download once, explore everywhere.
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
Victory Native
React Navigation
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.
