***** 40%-OFF SALE ***** Theodolite is on sale for 40%-off to celebrate its seven year anniversary! ***** As seen in Apple's Special Event Keynote, Theodolite is a multi-function viewfinder for iPhone and iPod touch that combines a compass, two-axis inclinometer, rangefinder, GPS, map, nav calculator, tracker, and geo-tag photo/movie camera into one indispensable app. Uses are endless, and the app is great for hiking, boating, hunting, golf, outdoor sports, sightseeing, navigation, and finding your way around. Theodolite is used extensively by surveyors, geologists, architects, engineers, competitive sportsmen, first responders, military personnel, and search and rescue workers around the world.

Theodolite lets you take geo-tagged camera images, screenshots, movies, and screen movies directly from the app, with 2X and 4X digital zoom and fast buffered saves. You can choose to overlay geographical data, time, date, and custom notes directly on photos and movies for later reference.

View your current position on the built in map view, with optional new Outdoors maps that include topo contours (feet or meters), roads, trails, landmarks, campgrounds, ski lifts, and more. Custom "live" map markers continually update distance/heading relative to the current location. Share map markers and nav calculator points with other users of Theodolite and Theodolite HD via SMS text messages and e-mail. This powerful capability opens up a wide range of collaborative uses which include team land surveying, accident investigations, spotting of wild fires, triangulation of landmarks, and advanced tactical observation and targeting operations.

Theodolite includes features for serious users like a reference angle mode, a nav calculator, data logging, e-mail export with KML, system-wide clipboard integration, percent grade display, mil compass readout, optical rangefinders (including a mil-based reticle, sniper-style stadiametric graphs, and a variable 4X-24X scope), and colored lens filters to improve use in dark conditions and preserve night vision. The app can provide location in military grid reference system (MGRS) coordinates, universal transverse Mercator (UTM) coordinates, British/Irish National Grids, US National Grid, and six latitude/longitude formats.

Optional US State Plane coordinates include SPCS27 and SPCS83 zones covering all US States. The optional Datum Pack adds over 230 geodetic datums to the app for more accurate position and altitude computation from GPS data, covering regions and countries on all continents around the world.

With an optional in-app purchase to enable team tracking, you can share location with up to 20 people on Theodolite's map. Team tracking was developed in conjunction with search and rescue teams to offer a good balance between simplicity and performance.

Theodolite has been featured several times in iTunes in "Rewind: Hot Trends in Apps", "The World Around You", and "New and Noteworthy". It has been a #1 selling Navigation app in App Stores around the world. Since its introduction in 2009, Theodolite has defined augmented reality navigation. The app continually introduces new technologies, pushing the limits of iOS app development.

Find out why Apple named Theodolite one of the most amazing apps available and showed it being used to explore the Great Wall of China. Where will you take it on your next adventure?

Theodolite requires an iPhone or iPod touch (see the Theodolite HD app for use on iPad or iPad mini). Note: GPS and compass requires an iPhone. iPod touch devices do not have GPS or compass hardware.

Theodolite App Description & Overview

The applications Theodolite was published in the category Navigation on 2009-11-30 and was developed by Hunter Research and Technology, LLC. The file size is 6.25 MB. The current version is 5.0 and works well on 7.0 and high ios versions.

Theodolite 5 is our biggest new release ever, with many new features and improvements. Here are some of them:

* Fully compatible with iOS 10, iPhone 7, iPhone 7+
* In-app purchase for offline Outdoors maps with topo contours (feet or meters), roads, trails, landmarks, campgrounds, ski lifts, and more.
* In-app purchase for US State Plane Coordinates. SPCS27 and SPCS83 are included for all US state zones.
* Addition of US National Grid position formats with 10/100/1000 meter precision.
* New datums added to Datum Pack: GDA94, GGRS87, JGD2000, ETRS89, NZGD2000.
* Distance/heading to active selected map marker show on main display along with aim indicator arrows (lower left).
* Sweeping azimuth sight line added to map pointer.
* Status indicators for position and altitude now blink to indicate GPS activity and glow steady to indicate GPS lock.
* Hardware status screen now updates accuracy numbers in realtime.
* Position activity/lock indicator (spinning wheel) shown on current location map pin.
* Smoother location updates on map screen.
* Revised map marker popups for more display area to show long coordinates/names.
* Added search format selection buttons to map search bar.
* Improved finger tracking response of 4X-24X variable rangefinder reticle.
* Revised floating crosshair reticle target to track horizon (previously was a pendulum).
* Addition of camera tags to KML when using main screen mail export.
* Dramatically sharper optical quality on main screen when using zoom.
* Option to add note to a log entry.
* Added datum code to log entries.
* Fixed UTM position search issues.
* Corrected behavior of UTM and MGRS coordinates when legacy datums (NAD27) are used.
* Added description of datum to photo/movie data overlay.
* Fix for bug in altitude computations affecting some datums.
* Improvements to rangefinder rendering.
* Addition of photo EXIF tags including app name and elevation/horizon angles.
* Dual usage of WGS-84 coordinates for proper compatibility with map content and data export formats when running an alternate datum.
* Dozens of interface tweaks and improvements throughout the app.

Thanks to our amazing customers whose feedback and suggestions over the past seven years have helped make Theodolite a great app! We appreciate your support. We're finalizing the next version of Theodolite, due out in the fall of 2017 after iOS 11 is released. If you have any feature requests, feedback, or suggestions, please contact us. Thanks!

Theodolite App Tips & Tricks

Theodolite Reviews


Problem with IPhone Compass  ISXDesign  3 star

I think the Theodolite app is very well designed. However, it relies on the compass in the iPhone 7 plus to be accurate. That's a big problem! All iPhone 7 plus phones have a worthless compass in them... I can't use the Theodolite app for anything real because all of the data that would need an accurate compass heading is wrong by incredible amounts. If you Google the compass issue on iPhone 7, you'll see everyone has pretty much the same issue and only Apple can fix it but they don't have much interest! So... Theodolite is good, maybe on other phones other than 7's... not useful on a 7 plus.


Amazing App for doing RF/Wireless Systems Engineering  SD116  5 star

I have been using this app since it came out and it's probably the best app I have on my iPhone to assist with RF Engineering. It allows you to document site locations and then export to a .KMZ file which is incredibly effective way to do surveys and map out locations . It also allows you to get approximate azimuth and horizontal alignment information so that when it's time to install the equipment you will have that information ready to go. I have never had any problems with it and it's with EVERY PENNY.

Alfonso Faustino

Dig it -- great app!  Alfonso Faustino  5 star

I really dig this awesome app. I do a lot of hiking and climbing in the Sierra Nevada, and the app's data is useful for me. The Developer, Craig Hunter, is responsive and helpful with questions and concerns I had and responded to my emails in a timely manner. Wish-list: Date-Stamp in the screen-shot mode. Thanks for the great work in developing this app! Check 6! /s/ Alfonso Faustino


No updated  tomfergy  1 star

This must be the first perfect application that doesn't need updates to keep current with the iOS. No updates since 2015. One stars because I like the app but it needs to stay current with hardware and OS changes.


amazing altitude and location overlay  j0hnny0  5 star

the overlay is simply awesome.

Mountain Viewer

Love this app  Mountain Viewer  5 star

Being able to take photos with annotation of azimuth and elevation is very helpful for understanding satellite dish setup issues. It's also just a lot of fun when traveling here in the Rockies.

Seadog Sean

Awesome  Seadog Sean  5 star

Does everything.


Great App!  bobbydanger53  5 star

Theodolite is a great app for just about any surveying, plotting, planning, and general information for building!


Fantastic App great back country treking  Transmaster  5 star

Theodolite is so useful for mapping the locations of isolated Beaver ponds. Creeks and other back country fishing locations. Plus recording other locations like good camp grounds with photo's, and Being able to send a photo with location info is icing on the cake. If you have a cell connection this app could be a life saver, to be able to send out accurate coordinates with a photograph of your location. Will you get help just that much faster. This just scratches the surface of what you can do with Theodolite.

Staaleson Engineering

Theodolite  Staaleson Engineering  5 star

Very useful. Excellent. I use this app on every site visit to record date, time, azimuth, lat/long on a photo of the front of the building. Good practice for all SCA. Necessary for structural condition assessments for insurance companies or for litigation.


Awesome travel/hunt/site seeing app  Resqrn  5 star

Total info on location, attitude & altitude. Snap a pic of unknown peak, junction, or hunt/fish location and info is stored on pic, even compass angle when taking pic. I don't fly. But an accurate landscape mount would make this a serious nav tool.


Outstanding  KI0DN  5 star

This app has had more versatility than I hoped for when I got it. Useful in so many ways.


Camera Doesn't Focus Well  DilboDilbo  4 star

I love this app and all. I am a surveyor and it's great for showing where and what way you are taking the photo. Especially with the datums and SPCS. BUT, the camera needs to be worked on a bit. It needs to focus for light. I wanted to use this for when I was locating manholes. Would have worked great, but the photo wouldn't adjust for the darkness of the hole. Yes, even with the flash. Please fix this. You will then receive my 5 star.


#1 Work Tool  Paveltolz  5 star

An absolutely essential tool for my work. Time savings, accurate locations, date time stamps and the ability to make on the spot notations without having to do so in two paces... The one real reason I keep using iPhones/Pads.


Great EDC Tool  Bronco:68  5 star

Very helpful EDC (everyday carry) tool. In the event of an emergency where communications are offline, your phone can still be a useful navigation tool.

ABQ Layabout

A good app  ABQ Layabout  5 star

As a teacher and tourist I've used this to plot archeological digs to showing students geological formations. It works seemingly everywhere and does everything I ask it to.


New upgrade  Monsterface11091109  1 star

I don't like the format the new upgrade uses on pictures. The older version was much nicer with all the information in the top left corner. My pictures are too cluttered looking now.


Document Geography  Encore88  5 star

Works as stated!


works great  Funkiestj  5 star

does what it says.


Survey instrument in iPhone  TrainMaster2  5 star

Overlay camera on inclinometer and more!

Theodolite Comments

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