By Hunter Research and Technology, LLC

Score: 4.5
From 1,897 Ratings


Theodolite 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. New for 2019 are AR Layers, including navigational aids like the sun, moon, 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 is an iPhone app -- see “Theodolite HD” for use on an iPad. And be sure to check out the all-new "Theodolite for Watch" and put Theodolite on your wrist!



  • Theodolite Review

    By Supporter in the objective!
    I specifically have utilized Theodolite for many specific projects with the power company and pragmatically referencing its facilitation it is indispensable! Thank you folks.
  • VR Headset Compatibility Soon?

    By Meysuhn
    I love this app. When will this be compatible with my VR headset?
  • Perfect for Construction Tracking

    By ThreeZeroThree
    I am an ITS and Tolling assessor representing the Colorado Department of Transportation and I use this app daily for tracking project progress. I am constantly taking photos of different job sites and don’t always have time to add them into PlanGrid that second. I used to have problems remembering where the photos were taken or even what they were taken for so to have the information imbedded into the photos is very helpful and very useful. Many of the other construction managers I work with now use Theodolite daily to track progress also. Thanks Theodolite!
  • Please improve contrast in setting

    By Prasadc
    Please improve contrast in setting
  • Great but two suggestions

    By retired-traveler
    This is a great app!!! Suggest that it be able to fully rotate display so that I can hold iPhone with any grip I want and not cover lens. Suggest that you have a photo review function within the app.
  • Position

    By motoup46
    I cannot get the position to work. I’ve done everything they suggested....
  • Along a windy path...

    This has been a perfect app for wilderness exploration and trail work with my dog. Although she can't read the app she does follow my eyes and we do just fine. 👣 (I think she is part dragon) 🐲 tic (tongue in cheek).
  • Project: Wind Tower. SD

    By jvc4352
    Very Good.
  • Review

    By 1gnatz
    Indispensable. Been using it for years, time to review it. We do storm water and erosion control and always always have it at hand, always showing it to people, best thing for site assessments, continually saves us from having to go back and measure something. Would you consider an option in Prefs to make the angle readouts announce when they are at zero? Especially the left/right tilt. Hard to see them in New Mexico sunlight sometimes. Or maybe an option to make it bigger when you need to. Thanks for the great app.
  • AKMike

    By akwildfire
    I love the app for work as it geotags on the photos BUT just put it on my XR and the app will mot let you close out of it Cant swipe up to close it off the screen Not sure if anyone else has this issue If its the app please fix it as i used it almost daily over the past 4-5 yrs