Theodolite HD 4+

AR Navigation Viewfinder

Craig Hunter

    • 4.7 • 133 Ratings
    • $8.99
    • Offers In-App Purchases

iPad Screenshots


Theodolite HD is a multi-function viewfinder that combines a compass, two-axis inclinometer, rangefinder, GPS, map, nav calculator, and geo-overlay photo/movie camera into one indispensable app. Theodolite was one of the very first augmented reality (AR) apps when it was released in 2009, and it’s been downloaded and used by millions of customers since then. Uses are endless, and the app is great for land measurements, outdoor sports, sightseeing, navigation, and finding your way around. Theodolite is a pro grade app and 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 data-overlay photos and movies with 2X-8X zoom. Overlay geographical data, angle markings, date/time, author/company info, and project notes directly on photos and movies for later reference. The same data is written into the metadata record of images, making image files self-contained data records. Third-party apps can tap into Theodolite's advanced camera functions with a camera sharing feature.

View current position on the built-in map with optional offline Outdoors maps that include topo contours, roads, trails, landmarks, campgrounds, ski lifts, and more. Live map markers continually update distance/heading relative to the current location and also show wayfinding info in the main viewfinder. Draw polygons on the map to mark things like property boundaries and trails, and import/export polygon data via KML.

Share map markers and nav calculator points with other users of Theodolite via text messages or e-mail. This powerful capability opens up a wide range of collaborative uses including team land surveying, accident investigations, spotting wild fires, triangulation of landmarks, and advanced tactical observation and targeting. With an optional in-app purchase to enable team tracking, you can share location with up to 20 people on Theodolite's map.

Theodolite includes features for serious users like a reference angle mode, nav calculator, map marker import/export, manual and automatic data logging with CSV and KML export, clipboard integration, %grade display, mil compass readout, optical rangefinders (including a mil-based reticle, sniper-style stadiametric graphs, and a variable 4X-24X scope), and night filters to improve use in dark conditions.

Theodolite can provide location in military grid reference system (MGRS) coordinates, Universal Transverse Mercator (UTM) coordinates, British/Irish National Grids, US National Grid, Maidenhead locator system, Map Grid of Australia, 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 to improve position computation from GPS data, covering regions and countries on all continents around the world.

AR Layers include navigational aids like the sun, moon, planets, and Polaris (North star), and the optional US Mountain Summits layer that shows over 70,000 US mountain summits in the viewfinder.

Theodolite has been shown in Apple Keynotes, featured on the App Store, and 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 and taking advantage of new hardware capabilities.

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?

Note: Theodolite HD is an iPad app -- see the regular “Theodolite” app for use on an iPhone or iPod Touch. And be sure to check out the all-new "Theodolite for Watch" and put Theodolite on your wrist!

What’s New

Version 9.0.3

Fix for graphics glitches affecting some devices on iOS 17.

Ratings and Reviews

4.7 out of 5
133 Ratings

133 Ratings

accuracy fan ,

Genealogy Tool

We use Theodolite to take pictures of cemetery headstones and other family history sites to augment our family history information. The imprinted information helps others locate historical site more accurately rather than from notes like near the big tree, near a gate, along the third driveway, etc. Since most cellphones have GPS capabilities, a Theodolite picture can help someone find a relevant place more easily.

Also, as the chairman of a small cemetery, I take a picture of each headstone and place that picture in the plot file. Now I can respond to an inquiry with a photo that has the location information.

Thank you to the folks who make Theodolite, what a great tool.

Light&Sound ,

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

DutchNeb58 ,

One Amazing piece of kit!

I bought this my Nav App back when it was iPhone 4 and it’s always one of the first apps I download now. If you’ve ever wanted to get your bearings, this is THE go to app. Easy to use, and packed with features ensure you won’t get lost, or can pinpoint that particular spot repeatedly. Take multiple readings to find that specific point in 3D space.

I dream that one day this interface will be overlaid with the interface for FILMic Pro to make an advanced professional camera for Cinema shooting.

App Privacy

The developer, Craig Hunter, 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 Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

More By This Developer

Pro Compass
Pro Compass for Watch
Theodolite for Watch
Pro Altimeter - Barometric+GPS
Wx for iPhone

You Might Also Like

Eos Tools Pro
3D GIS Digital Elevation Model
You Need A Map
Scenic Map