App Overview

Altimeter GPS & Real Altitude icon

Altimeter GPS & Real Altitude

LionsApp di Nallbati Elton · Navigation

Altimeter transforms your device into a reliable tool for measuring your current altitude.

$1.99 · In-app purchases

PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.6
11 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 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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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 & Real 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 mode to save records.

Assumption to check: Limited offline functionality for altitude recording.

Validate with people who use this workflow before building.

Hypothesis 2

Simplify purchase options and provide clear benefits.

Assumption to check: In-app purchases can be confusing.

Validate with people who use this workflow before building.

Hypothesis 3

Allow users to customize the display and settings.

Assumption to check: Lack of customization options for users.

Validate with people who use this workflow before building.

Hypothesis 4

Improve GPS accuracy and provide user calibration options.

Assumption to check: Inaccurate altitude readings in some areas.

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

Altimeter transforms your device into a reliable tool for measuring your current altitude. Elegant design inspired by aviation altimeters, an intuitive interface, and practical features for hikers, travelers, and the curious. Key Features: • Real-time altitude Get the exact altitude of your current location, in meters or feet, with dynamic updates. • GPS signal The app doesn't require an internet connection, just a GPS signal. • Flexible units Easily switch between meters and feet, depending on your preferences. • Automatic location detection The app locates your location and displays it on a map, showing the altitude, location name, address, latitude, and longitude. • Saving locations Save unlimited favorite locations or points of interest (in-app purchase required). • Design inspired by aviation instruments The interface is reminiscent of a cockpit altimeter, making the user experience pleasant and familiar. Instructions for use: For accurate measurements, position yourself in an open area to receive a GPS signal. When the app receives a GPS signal, the display will show your current altitude. You can select meters or feet directly from the settings. Why choose Altimeter? • Clear and immediate altitude display • Ability to save and recall favorite locations • Simple, no-frills use • Elegant interface consistent with real-world instruments • Extensive language support Support & Feedback: Do you have any suggestions or want to report a bug? Email [email protected] or visit www.lionsapp.com. If you like the app, please leave a review on the App Store.

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.

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BUILD KIT DIFFICULTY
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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.