App Overview

Altimeter Pro - GPS Altitude icon

Altimeter Pro - GPS Altitude

Vladislav Zhirnov · Travel

Know your altitude anywhere, anytime

$1.99

PRICE
$1.99
No 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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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.

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.

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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> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for Altimeter Pro - GPS Altitude: 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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App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

Screenshots

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App Store description

Know your altitude anywhere, anytime. Whether you're hiking mountain trails, skiing steep slopes, or exploring new terrain — Altimeter Pro gives you precise elevation data using both GPS satellites and your iPhone's built-in barometric sensor. WHY ALTIMETER PRO? Your iPhone has powerful sensors most apps don't fully utilize. Altimeter Pro combines GPS triangulation with barometric pressure readings through an advanced sensor fusion algorithm. The result? Altitude measurements that are more accurate and responsive than either GPS or barometer alone. ACCURATE ALTITUDE MEASUREMENT • GPS altitude from satellite triangulation — works completely offline • Barometric altitude using the built-in pressure sensor • Smart sensor fusion combines both for best accuracy • Automatic calibration with sea-level pressure reference • Track minimum and maximum altitude during your session FULL BAROMETER • Real-time atmospheric pressure in hPa, inHg, or mmHg • Monitor pressure changes that may indicate weather shifts • Relative altitude tracking shows how much you've ascended or descended since launch BUILT-IN COMPASS • Smooth animated compass with true north heading • Cardinal and intercardinal direction display • Bearing in degrees for precise navigation GPS & LOCATION • Coordinates in both decimal degrees and DMS format • Reverse geocoding shows your current place name • Speed display and GPS accuracy indicators ALTITUDE CHART • Real-time graph plots your elevation over time • See your ascent and descent profile at a glance • Record sessions to capture your route's full elevation changes DESIGNED FOR THE OUTDOORS • Dark interface optimized for sunlight readability • Large, bold altitude display readable at arm's length • Single-screen dashboard — all data visible without navigating • Works offline — no cellular signal required PERFECT FOR • Hikers and trekkers tracking elevation gain • Skiers and snowboarders monitoring altitude on the slopes • Mountain bikers riding technical terrain • Paragliders and pilots checking altitude • Fishermen and weather watchers tracking barometric pressure • Surveyors and construction workers checking relative height • Anyone curious about their current elevation SHARE YOUR ADVENTURE Instantly share your altitude, coordinates, and location with friends. Show them exactly where you are and how high you've climbed. FULLY CUSTOMIZABLE • Switch between meters and feet • Choose pressure unit: hPa, inHg, or mmHg • Select altitude source: GPS, Barometer, or Fused • Adjust sea-level pressure for manual calibration Download Altimeter Pro and never wonder about your elevation again.

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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

Incorporate social sharing to allow users to share their altitude achievements.

Assumption to check: Limited user engagement features (no social sharing or community aspects)

Validate with people who use this workflow before building.

Hypothesis 2

Add themes or customization for units and display.

Assumption to check: No customization options for users

Validate with people who use this workflow before building.

Hypothesis 3

Implement offline mode for altitude tracking without GPS.

Assumption to check: Lack of offline functionality

Validate with people who use this workflow before building.

Hypothesis 4

Integrate with fitness apps to track altitude during workouts.

Assumption to check: No integration with other fitness apps

Validate with people who use this workflow before building.

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.

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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.