App Overview

Altimeter Pro: Compass, GPS icon

Altimeter Pro: Compass, GPS

Furkan Ozoglu · Navigation

While traveling with a vehicle (car, bicycle, etc.), while hiking or climbing, you can instantly discover your location and altitude, direction, geographic coordinate, address and atmospheric pressure on the map

$6.99 · In-app purchases

PRICE
$6.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.5
42 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.

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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.

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: Compass, GPS: 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 improved location accuracy algorithms.

Assumption to check: Inaccurate GPS readings in dense urban areas

Validate with people who use this workflow before building.

Hypothesis 2

Introduce offline map and altitude tracking features.

Assumption to check: Limited offline functionality

Validate with people who use this workflow before building.

Hypothesis 3

Streamline UI for better user focus.

Assumption to check: Cluttered UI with too many options

Validate with people who use this workflow before building.

Hypothesis 4

Enable sharing of location or altitude data with others.

Assumption to check: No sharing options for location 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

While traveling with a vehicle (car, bicycle, etc.), while hiking or climbing, you can instantly discover your location and altitude, direction, geographic coordinate, address and atmospheric pressure on the map. While following your direction on a detailed compass screen, you can also monitor the change in your altitude. You can share the photos you take with your loved ones, including your altitude, geographic coordinates and address information. Depending on the shooting angle, the compass direction is included in the photos. SAVE THE ALTITUDES OF DIFFERENT LOCATIONS ON THE MAP (Marker Mode) You can explore and save altitude information of selected locations on the map - You can find out the altitude and coordinates by marking the locations on the map - You can save data for these locations DISCOVER YOUR ALTITUDE ON THE MAP (Normal Mode) You can instantly discover the information of your location on the map. - Altitude - Open air (atmosphere) pressure - latitude and longitude coordinates and address - Speed ​​in motion - Direction with a detailed compass FOLLOW YOUR ALTITUDE ON THE MAP ON THE MOVE (Track Mode on the Map) On the map when traveling in a vehicle (car, bike, etc.), hiking or climbing You can instantly track your location and the change in information. - Altitude - Open air (atmosphere) pressure - latitude and longitude coordinates and address - Speed ​​in motion - Direction with a detailed compass TRACK YOUR ALTITUDE ON THE COMPASS (Compass Mode) While traveling with a vehicle (car, bicycle, etc.), while hiking or climbing, you can instantly track your direction and the altitude of your current location. SHARE YOUR PHOTO WITH YOUR LOVED ONES WITH ALTITUDE AND DIRECTIONAL INFORMATION (Sharing Mode) While traveling with a vehicle (car, bike, etc.), hiking or climbing, you can share the photos you have taken with this information. - Altitude, pressure, coordinate and address information will be on the photo - Depending on the shooting angle, the compass direction will be added to the photo YOU CAN ACCESS ALTITUDE AND LOCATION INFORMATION FROM APPLE WATCH IMPORTANT REMINDER ABOUT CALCULATION METHOD AND ACCURACY - The coordinates of the altitude and location are calculated using the GPS signals of the device used - There may be differences in the measurement values ​​depending on the GPS signal quality of the device's location. - Just below the altitude value, the accuracy of the measurement is given instantly in meters - Compass accuracy may be affected by magnetic or environmental interference

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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
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Zustand
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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.