App Overview

Altimeter GPS & Barometer icon

Altimeter GPS & Barometer

Aesthetic Apps & Widgets srl · Navigation

Unlock the full potential of your iPhone's sensors for your wilderness adventures and survival situations with Altimeter GPS

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
4.6
2,123 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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A product spec, screen plans, and build steps for your coding agent.

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What's included18 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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Quick prompt

> SELECT BUILD PLATFORM:

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

// RORK SYSTEM PROMPT
Rork plan preview for Altimeter GPS & Barometer: 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 better GPS filtering and calibration features.

Assumption to check: Inaccurate altitude readings in certain locations

Validate with people who use this workflow before building.

Hypothesis 2

Add offline data caching for altitude readings.

Assumption to check: Limited offline functionality

Validate with people who use this workflow before building.

Hypothesis 3

Offer an ad-free subscription option.

Assumption to check: Ads can be intrusive

Validate with people who use this workflow before building.

Hypothesis 4

Redesign UI for a more modern look with improved usability.

Assumption to check: User interface feels outdated

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

Unlock the full potential of your iPhone's sensors for your wilderness adventures and survival situations with Altimeter GPS. This app is thoughtfully designed for offline use, ensuring you're equipped even in remote locations. Key Features: Accurate Altimeter: Get precise altitude readings using our innovative "Pure Altitude Algorithm," whether you're tracking your location through GPS, Aster, or barometric data. No Internet Required: Unlike other altimeter apps, we don't rely on internet connections. Altimeter GPS reads your iPhone's GPS and barometer data directly with our advanced algorithms, making it your trusty companion in mountains, deserts, and beyond. Altimeter and Speedometer: Choose between meters-km/h or feet-mph for altitude and speed readings, all without needing an internet connection. Barometer Altitude Measurement (iPhone 6 and iPhone 6 Plus) Pedometer/Step Counter: Utilize the M7 co-processor of your iPhone 5s/6/6 Plus for step counting – no setup required. Stay active and healthy effortlessly. Sunrise/Sunset Calculator: Plan your outdoor activities with precision using our proprietary algorithm, calculating sunrise and sunset times based on your GPS coordinates. Position Finder: Mark your starting point and determine the shortest route back. Today Widget: Access your current address and altitude conveniently with the iOS 8 Today Widget. Flashlight: Our elegant and functional flashlight is bright, fast, and simple to use. Compass: Stay on course with a real-time direction indicator on the main screen and a handy new compass with Place Finder – all without needing Wi-Fi or 3G. Multiple Maps: Choose from Open Street Map, Hike Map, Stamen Map, and Open Cycle Map for your navigation needs. Chronometer: A simple and efficient tool that works even in the background. Always Know Your Location: Your current address is displayed prominently on the main screen, ensuring you're never lost. Whether you're conquering Mount Everest or exploring Death Valley, Altimeter GPS is your ultimate companion for outdoor activities like hiking, walking, skiing, rock climbing, mountain biking, and more.  Don't rely on an internet connection for altitude and barometer – trust Altimeter GPS to guide you on your adventures. Subscribe to access to premium app features; subscription details are the following: • Length: weekly, monthly, yearly • Your payment will be charged to your iTunes Account as soon as you confirm your purchase • You can manage your subscriptions and turn off auto-renewal from your Account Settings after the purchase • Your subscription will renew automatically, unless you turn off auto-renew at least 24 hours before the end of the current period • The cost of renewal will be charged to your account in the 24 hours prior to the end of the current period • When canceling a subscription, your subscription will stay active until the end of the period. Auto-renewal will be disabled, but the current subscription will not be refunded • Any unused portion of a free trial period, if offered, will be forfeited when purchasing a subscription Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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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.

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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.