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    SAR Expert: Testing the Best Cell Phone Compass Apps

    best smartphone compass apps

    Very few people go anywhere these days without a smartphone. It’s gone so far as to replace the basics of a wristwatch for some people, who pull it out of their pockets whenever they need to check the time. And smartphones do so much more to replace (or amplify) other everyday tools — and that includes something as vital as a compass. While it’s important to have a tried-and-true traditional magnetic compass with you when you venture into the wilderness, it would be naïve to think that many many people aren’t using their smartphone’s compass apps to help guide their way. So, in the interest of outdoors safety, it’s important to explore the best cell phone compass apps to have so that you can be prepared in any situation.

    This piece is the third part in a series of articles intended to shed some light on the oldie but goodie technology of compasses. While this tool is over a thousand years old, it is still a handy item to master to keep from getting lost. This series is covering the following discussions: (1) Compass Selection; (2) Using an Orienteering Compass; (3) Cell Compass Apps; (4) Declination; (5) Map Reading; (6) Map and Compass.

    Part 3: Cell Phone Compass Apps

    We used six apps to see how well they worked. The series’ author, Rob, evaluated three apps on an Android device, while colleague Melissa Weeks evaluated three on an iPhone. We compared the accuracy of these apps to three different bearings, each determined and checked three times using a magnetic compass. We also evaluated user interface convenience and noted other functions the apps make available. It is important to note that most apps had a setting for calibrating the compass. Any compass app you chose for your phone should have this capability.

    Other observations include whether ads are displayed. Only two apps could be used when holding the phone in a vertical position; all others required the phone to be held flat/horizontally.

    It should be stated that there are often issues with apps mining data from phones. There are certainly many agreements and notifications about allowing the app to access different segments of the phone’s operating system, so it is entirely up to you as the consumer to decide the pros and cons of installing an app on your device.


    iPhone apps

    The following three apps were installed from the Apple App Store and evaluated on an iPhone. All stars-ratings were gathered from the App Store users who posted their feedback.

    1. Commander Compass Go

    Earning 4.6 stars in 4,460 ratings, Commander Compass Go (CCG) is an offline GPS app that offers a fairly, hi-tech compass and in-app video tutorials. It does not display advertisements during use. The user will find the detailed compass rose to be large and easy to read. In addition, the screen continuously displays the compass bearing along with elevation, latitude-longitude, USNG coordinates, calendar date, and current time. During app use, holding the iPhone vertically or parallel to the ground has no impact on compass consistency. When compared with readings on the baseplate compass, CCG generally presents a 2-3-degree difference. Other magnetic fields do not appear to impact this compass app, and it offers a litany of additional features/settings, including: different map styles, waypoint tracker, distance to multiple targets, coordinate converter, and the ability to copy/paste/share coordinates and map links. There is a CCG Pro upgrade for a minimal cost.

    2. iPhone Compass

    This app rated 4 stars by 1,897 users in the App Store. The standard iPhone Compass appears as a pre-loaded utilities app on the iPhone. It does not present pop-up ads. This resource offers a sizeable, simple compass view. Below the compass itself, the app uses large characters to display a numeric heading and general direction letters. The user may opt to see the latitude and longitude of his/her current location and also find elevation above sea level. Tapping the screen locks in the current heading and shows a red band as a method of staying on course. There are no additional features with this app. Holding the iPhone vertically and horizontally generates a 3- to 5-degree difference, with the horizontal reading consistently being less than the vertical one. When compared to the base plate compass, iPhone Compass presented a 7-degree difference. Other magnetic fields do influence this app.

    3. GPS Compass

    In the Apple App Store, 343 users rated GPS Compass as earning 3.8 stars. This product displays ads at the bottom of the screen, and other magnetic fields do impact accuracy. Compared to the baseplate compass, the app consistently agrees with the reading. GPS Compass’ display presents in landscape view only and, even when the iPhone is rotated, does not shift to portrait. The compass itself appears at the top of the display and is linear rather than a rose. Numbers and general direction indicators are easy to see, and the bearing is consistent in both vertical and horizontal phone positions. Users see current altitude, latitude and longitude indication, and a horizon finder. In addition, there is a button for photos and a “start tracking” feature to record a track. There is an option to save and share the track. Finally, the app offers the choice of a gray grid screen or a map underlay that requires a “Simple” or “Satellite” choice.


    Android apps

    The following three apps were installed from the Google Play store and evaluated on an Android phone. None of these apps worked with the phone in a vertical alignment. To function effectively, all these apps required the phone to be held flat, parallel to the ground.

    1. Just a Compass

    This app is rated 4.7 by 37,000 users on the play store. This app does not display any ads during use. For user interface, the numbers are relatively easy to read, as well as showing the cardinal directions. The app consistently displays a reading that is 7 to 12 degrees less than the actual compass bearing. Other functions are available as well, including sunrise/sunset times, coordinates and address of location and altitude. Interestingly enough, other magnetic fields do not seem to affect the readings on this app.

    2. Simple Compass

    This app is rated 4.9 by 280 users on the play store. This app displays ads during use. The numbers are difficult to read on the display, except for the readout of the direction the phone is pointed. There are no additional extra features included with this app. The bearings are fairly accurate, with a variation of 1 to 4 degrees from the plotted compass bearings. This, like most compass apps, is affected by other magnetic fields if close enough to the phone.

    3. Compass Steel

    This app is rated 4.5 by 19,000 users on the play store, and it does not display any ads during use. The display is easy to read. In addition to the normal heading display, the app has an interesting display design with a bar extending to either side of north to show how many degrees the user is facing from north. Another helpful feature is the calibration quality display. The app was fairly good with accuracy, showing bearings that were only 2 to 3 degrees different than the course bearings.

    Summary

    A few years ago, I was teaching a search and rescue class to a police department. When I asked the class if anyone brought a compass, most of the participants held up their cell phones. Willing to try something new, I wanted to see how the phone apps would work out. When students progressed through the compass course, pretty much everyone with digital compasses did just as well as other students who used a compass for the first time. The ones who made the biggest mistakes had not yet calibrated the compass app on their phones.

    From the trials in this article, I recommend the Compass Steel app for Android users, and my co-author recommends Commander Compass Go for iPhones. Stay tuned for the next article where declination is explained. In the meantime, enjoy your outdoor surroundings!

     

    Rob Speiden is a professional search and rescue volunteer who has participated in over 330 searches since 1993. He teaches land navigation, tracking and other SAR classes for both the Virginia Department of Emergency Management and his own Natural Awareness Tracking School. Rob has written two books on tracking humans for SAR: “Foundations for Awareness, Signcutting and Tracking” and “Tracker Training.” More information about Rob’s books and classes can be found at www.trackingschool.com.

    Melissa Weeks is a professional educator, search and rescue (SAR) volunteer, EMT-B, and a SAR class instructor for the Virginia Department of Emergency Management. She thoroughly enjoys participating in orienteering and human/animal tracking adventures.

    Feature image by Kaspars Grinvalds, Shutterstock

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