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Theodolite HD

By Hunter Research and Technology, LLC

This app is only available on the App Store for iOS devices.


***** 40%-OFF SALE ***** Theodolite HD is on sale for 40%-off to celebrate its seven year anniversary! ***** As seen in Apple's iPad Special Event Keynote, Theodolite HD is a multi-function viewfinder for iPad and iPad mini 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 HD requires a camera-equipped iPad or iPad mini (see the regular Theodolite app for use on iPhone and iPod Touch). Note: GPS requires an iPad with 3G or 4G cellular data capability. WiFi-only iPads do not have GPS hardware.

What's New in Version 5.0

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

* Fully compatible with iOS 10
* 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!

iPad Screenshots

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iPad Screenshot 3
iPad Screenshot 4

Customer Reviews

Great App, but offline maps are very expensive

I've always liked this app for site survey of local obscura and the like.
Since they added the offline map function I thought it would be a great hiking add (like a GPS). I like using my iPad as a GPS even though I know its big. the large screen is really nice for looking at the local terrain.
The capability to download offline maps is very attractive so I bought 100,000 tile credits for $15 to download maps for hiking. I defined the area of one local park/hiking are to download and found that 100,000 tiles was not enough! I did a test and found I need about 10 tiles just to cover an area the size of my house and yard.
A fine app but does not make dollars and sense for the average hiker. For $100 I can buy detailed maps for my GPS that cover NM, AZ, UT, and CO. At Theodolite prices, $100 would buy offline maps for about 1 county

Pretty good for what it is

I'm not I. The habit of writing reviews , in fact I think this is my second one . The app is pretty good for what it is , however I have one underlying complaint the in app purchases chiefly buying tiles . The state plane coordinates I can understand, the amount of tiles necessary to do even the simplest task is
Too outrageous. Cmon guys . Really .
Yes I understand it takes time and money to produce a worthwhile app but you could up the amount of tiles needed to cover a decent survey grid .then I would give you 5 stars .


Love the app. Use it for photography scouting on iPad. Please update and include user definable film frame that can simulate various lens focal lengths and chip or film sizes. Right now it is just wide angle and it would be so much more helpful for simulations. The pictures could be used for story boarding feature films as well. Right now I want to simulate a location shoot for a year away of a total eclipse of the sun that includes a unique landscape as the foreground.

Theodolite HD
View in iTunes
  • $5.99
  • Category: Navigation
  • Updated:
  • Version: 5.0
  • Size: 6.6 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 7.0 or later. Compatible with iPad.

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. Datum Pack$2.99
  2. 5,000 Map Tile Credits$0.99
  3. Team Tracking$0.99
  4. 20,000 Map Tile Credits$3.99
  5. 10,000 Map Tile Credits$1.99
  6. 50,000 Map Tile Credits$8.99
  7. US State Plane Coordinates$19.99
  8. 200,000 Map Tile Credits$27.99
  9. 100,000 Map Tile Credits$15.99