Barometer & Altimeter: HowHigh
Barometer & Altimeter: HowHigh Summary
Barometer & Altimeter: HowHigh is a free iOS app in Tools by Thirty Seven Inc.. Released in Oct 2014 (11 years ago). It has 30 ratings with a 2.67★ (poor) average. Based on AppGoblin estimates, it reaches roughly 123 monthly active users . Store last updated Aug 23, 2026
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Barometer & Altimeter: HowHigh SDKs Summary
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2.67★
Ratings: 30
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App Description
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.