Barometer & Altimeter: HowHigh
Elevation tracker & charts
Free · Designed for iPad. Not verified for macOS.
Free live altitude and pressure readings, session recording, charts, comparisons and CSV export—with calibration and sensor-confidence context.
HowHigh is a free barometer and altimeter toolkit for following altitude and air-pressure changes. See live readings, record sessions, and compare history on iPhone and iPad—without a subscription.
USE HOWHIGH TO:
- View live pressure, altitude, rate of change, elevation gain, and sea-level adjustments.
- Record hikes, climbs, hills, stairs, weather observations, and experiments.
- Review session history, compare recordings, and explore interactive charts.
- Share results or export recorded data as CSV.
- Choose manual calibration, optional WeatherKit calibration, or nearby NWS station calibration where supported.
- See the active measurement source and sensor-confidence context alongside each reading.
- Switch between metric and imperial units.
Your recorded sessions stay on your device until you choose to share or export them. Core readings and saved history remain available offline; online calibration sources require a connection.
HowHigh is designed for everyday observation and exploration. It does not replace certified instruments or safety-critical guidance.
Track how altitude and air pressure change over time—all core features are free.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
HowHigh 1.4.2 makes Apple Watch even more useful:
- Add the new atmospheric pressure complication to see current pressure, trend, units, and freshness at a glance.
- Complications refresh more responsively while remaining battery-conscious.
- Improved freshness handling clearly marks outdated readings.
- Additional reliability and polish throughout the app.
The developer, Thirty Seven Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Thirty Seven Inc.
- Size
- 7.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Location
- This app may use your location even when it is not open, which can decrease device battery life.
- Languages
English and 9 more
- English, Arabic, French, German, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- Copyright
- © 2026 Thirty Seven, Inc.