Barometer

Air pressure readings and related altitude estimates (device dependent).

iPhoneiPadMacApple Vision ProApple TVApple Watch

Overview tab with a segmented pressure gauge

Overview

The barometer measures air pressure and can estimate relative altitude changes.

Table of Contents

• Overview
• Tabs
• Overview Tab
• Graph Tab
• Details Tab
• Permissions
• Notes And Limitations

Tabs

• Overview: segmented gauge.
• Graph: pressure and altitude history.
• Details: large numeric readouts and high-precision values.

Overview Tab

The Overview tab displays a segmented gauge that fills based on current pressure.

Graph Tab

Graph tab with pressure and altitude history

The Graph tab shows two charts:

• Pressure history (kPa)
• Altitude history (meters)

Details Tab

Details tab with measurement cards and high-precision readouts

The Details tab includes:

• Pressure measurement card (kPa)
• Altitude measurement card (meters)
• High-precision values (many decimal places) for copy/paste and diagnostics

Permissions

On iOS, barometer readings may require Motion & Fitness permission. If permission is denied, Lirum shows a permissions prompt with a shortcut to iOS Settings.

What You Can See

• Air pressure (displayed in kPa)
• Relative altitude changes (if available)
• Update frequency / history graph (if available)

Notes

• Not all devices include a barometer.
• Pressure can change with weather and indoor HVAC, not just altitude.

Notes And Limitations

• The tool reports relative altitude based on pressure changes and may not match GPS altitude.