Compass & Altimeter

In-app purchases
4.6
111K reviews
5M+
Downloads
Content rating
Everyone
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About this app

A simple and easy to use Compass to retrieve useful information about your current position such as true Geographic north and true altitude above sea level.

• Works perfectly offline and without network access
Geographic north using magnetic declination
True altitude above mean sea level (AMSL)
Sunrise & Sunset times
• Azimut angles in deg, grad, mrad, gon
• Various dials and color themes (including high contrast)
• Angle measurement (with dials including measuring capabilities)
• Bubble Level functionnality (available in iPhone dial)
• Use EGM96 as the geoid reference for computing altitude
• Latitude & Longitude in MGRS, UTM coordinate formats
• Latitude & Longitude in DD, DMM or DMS format
• British National Grid (OSGB86) coordinate system
• SwissGrid (CH1903 / LV95 / MN95)
• Magnetic field strength to detect potential perturbations
• Sensor accuracy
• Address of your current location (requires data connectivity)

Compass better works outside where magnetic perturbations are low. Magnetic closure cell phone cases may also disrupt the accuracy of the compass.

EGM96 (Earth Gravitational Model) is used as the geoid reference to compute true altitude above sea level from data collected by the GPS sensor. UTM (Universal Transverse Mercator) is a system for assigning coordinates to locations on the surface of the Earth.

Have fun !
Updated on
Mar 5, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
App info and performance and Device or other IDs
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

4.6
110K reviews
-neil-
January 22, 2024
I gave up trying to figure out how Googlemaps can display altitude. "Compass & Altitude" delivers, easily. Pretty app. Going ad-free costs more than average, but it's not bad for a concise app. Yeh, about 75 toggles need to be switched to stop data-sharing. If you go back to see everything is de-selected, the toggles that were On by default turn back on, so you have to toggle them back off again, so you can't really review your settings. Many toggle sharing permissions are incomprehensible.
68 people found this review helpful
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Jennifer Shearer
February 28, 2024
Uninstalling app partially due to it wantling all kinds of data from me. This was not initially present the first month or two that I had it. Not sure if app works correctly as the readings can be wildly different. I attempted to see how it worked outside when I got hit with a bunch we want your data and you also want to store or access information on my device. You are so not getting that permission! Uninstalled.
44 people found this review helpful
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Derek Wilson
November 9, 2020
Just downloaded this app, but I like the interface and features. I use astronomy and photography apps and they have a calibration feature that is the same figure 8 motion, but I discovered last night that I wasn't able to just easily force recalibration, and the orientation of their data was glaringly off by several degrees. I am unable to turn on full-time access to the device's location data for those apps. But this app allowed me to turn on full-time access, so even that's an improvement.
247 people found this review helpful
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