Free barometer & altimeter — real-time pressure, altitude, 10-day forecasts with migraine alerts, automatic history logging, and CSV export all in one app.
The dashboard displays high-precision real-time measurement data, offering peace of mind for mountaineering enthusiasts and outdoor adventurers.
It uses your device's built-in barometric pressure sensor, motion sensor, and GPS, allowing offline use.
It also features real-time trend graphs, making it ideal for observing short-term changes during typhoon approaches, sudden downpours, stair/elevator ascents/descents, or driving uphill.
The altimeter lets you simultaneously view readings from three sources—sensor, GPS, and QNH (sea-level corrected pressure)—plus a calibrated value matched to a known elevation such as a trailhead.
Each altitude is displayed visually on an arch gauge, and you can tap each source to learn about its characteristics and accuracy.
Since barometric pressure and altitude support various units, it can also be used for professional purposes by researchers and academic institutions.
Additionally, for those sensitive to weather changes and suffering from migraines or weather-related illnesses, it provides graphs forecasting barometric pressure and weather for the next 10 days, along with medically grounded headache alert information updated every 6 hours.
Its graphical, intuitive UI runs smoothly, making it a valuable tool for daily prevention and countermeasures.
Furthermore, measured barometric pressure data is automatically stored within the app.
It features a background measurement mode that enables measurements even when the app is in the background or asleep. You can view accumulated data and export it to CSV files.
It also supports Live Activities in the background, allowing you to view real-time data on Dynamic Island or the lock screen.
Beyond the main app, it also works with Apple Watch, letting you instantly check barometric pressure and altitude.
An all-in-one, high-performance barometer app covering all present, future, and past information related to barometric pressure.
The one-of-a-kind app you never knew you needed—that's "Torr"!!
【Features】
・Dashboard
・Barometer (Atmospheric pressure data via pressure sensor)
・Altimeter — View altitudes from 4 sources on arch gauges
・Sensor Altitude (absolute altitude from the barometric sensor)
・GPS Altitude (elevation above sea level via satellite positioning)
・QNH Altitude (sea-level corrected barometric altitude)
・Calibrated Altitude (calibration matched to a known elevation)
・Pressure Forecast
・Up to 10 days of nearby sea-level pressure values and weather forecasts
・Pressure graph showing trends like rises and falls
・6-hourly migraine/weather sensitivity alerts based on medical evidence
・History
・Automatic data logging
・Daily history export to CSV files
・Background measurement mode
・Unit settings — 7 pressure units including Torr, hPa, kPa, mBar, psi, inHg, mmHg
・Color theme settings
・Torr Pro plan for ad-free experience
・Apple Watch compatibility
・Lock screen widget
・Live Activity
【Other】
Some devices may not have a barometric pressure sensor or motion sensor.
Please note that in such cases, certain dashboard features may not be available.
Location access and an internet connection are required to use the barometric pressure forecast.
Location access is required for background measurement.
Please submit requests or inquiries via reviews or the support URL.
Hi. I just wanted to let you know I find your app helpful. I have chronic daily migraines and the majority of them are weather related. But I notice in your app you only use the words “caution” and “danger” when the pressure is expected to drop, not when it’s supposed to rise. That’s when my headache symptoms begin. Thought you might consider adding some additional warnings for people who have those migraines. Thanks!
Too hard to decipher
LilAl88
Might be great for somebody who knows how to read pressure charts, but I do not. There is no key or any kind of guide to explain how to use the app or what any of the data means for those of us who are sensitive to pressure changes, except for a “caution” and “warning” highlighted area, and even those didn’t have any more info. There’s also no way to change your location to anything but your current one from what I could tell, so unhelpful for planning trips. I switched to Pressure Pal and knew within 30 seconds I like that app way better.
Helps me plan
Lucyarlene
This app is so accurate that it helps me plan my day since I am very sensitive to air pressure changes. Would have been 5 star if I didn't have to deal with ads. I would pay to not have the ads and use this app.
Developer Response
Thank you so much for your kind words and for using our app. We’re glad it helps you plan your day.We offer “Torr Pro,” a subscription that removes all ads for a seamless experience. You can find it in the app’s Settings screen. We hope you’ll enjoy with ad-free.
Recent update
Jmielei
The recent update states that the pressure forecast is easier to read for headache information. I find it much more difficult to have to navigate especially while having a migraine. Previously, the up-and-down trends were clearly defined in red and green. Please bring this feature back it was extremely useful.
Developer Response
Thank you for your feedback. We understand that weather migraine sensitivity varies between users. Our recent update focused on notifying general migraine effects based on medical evidence, but we’re considering adding personalized sensitivity settings. You can track hourly pressure trends using the arrows next to the pressure values on the top panel. We appreciate your input!
- Fixed a bug where barometric pressure and relative altitude could stop being displayed under certain conditions
Version 3.10.3
The developer, SoyApps, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Location
Identifiers
Usage Data
Diagnostics
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
SoyApps
Size
17.8 MB
Category
Weather
Compatibility
Requires iOS 17.0 or later.
iPhone Requires iOS 17.0 or later.
iPad Requires iPadOS 17.0 or later.
Mac Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
Apple Vision Requires visionOS 1.0 or later.
Apple Watch Requires watchOS 9.6 or later.
Location
This app may use your location even when it isn’t open, which can decrease device battery life.
Languages
English and 7 more
English, French, German, Japanese, Korean, Simplified Chinese, Spanish, Traditional Chinese
