Free live altitude and pressure readings, session recording, charts, comparisons and CSV export—with calibration and sensor-confidence context.
Know your elevation. Follow pressure changes. Keep a useful record of your hikes, climbs, stairs and everyday observations—with clear readings on iPhone and iPad, plus Apple Watch, widgets and Live Activities on supported devices.
• Current altitude above sea level, with relative gain and net change kept separate. Check the reading source and freshness; authorized GPS can provide a fallback where available.
• Start, pause, resume and save a recording. Authorized background recording keeps a session going while you use another app or lock your phone.
• Find, rename and favorite saved recordings, add notes, compare charts and share data as CSV.
• Check your wrist, widgets or Live Activity. Use Siri and Shortcuts to read, record or open saved sessions; interactive controls are available on supported OS versions.
• Keep familiar metric/imperial units, Set Zero and pressure-reference calibration. Choose automatic weather, manual reference or a nearby US weather station where available.
Readings depend on device hardware, permissions, source availability and conditions. Widgets and complications refresh on the system's schedule, not continuously. Watch recording controls need a reachable iPhone; phone-free Watch recording is not included. Saved history and supported local readings work offline; weather and station updates need a connection. HowHigh is for observation, not certified navigation or safety-critical guidance.
Updated and improved flow and functionality is imported intuitively is a goal suggestion better explaining section of how and why calibration is important..more increased understanding of the appnavigation..In an app it is just not functionit is interface and user experience and user understanding the flow This could be a swipe example use instructions
Accurate and Easy to Use
_boyo_
HowHigh is the most accurate and easy to use barometer and altimeter app out there. Super user friendly and really helpful!
Don’t use this
kingcookie421
It don’t work it’s a waste of time
Developer Response
I have since completely rewritten the app. Would you mind reevaluating your 1 star review? It would really help my rating! 🙏
So simple.
@jacobskinsuit
Does what it says, and does it by actually using the iPhone 6's BAROMETER. That's super cool! I use this app in elevators just for kicks. Because why not?
This update includes interface refinements and bug fixes.
Version 1.4.4
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
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Thirty Seven Inc.
Size
9.5 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.
Location
This app may use your location even when it isn’t open, which can decrease device battery life.
