Comparison

Theodolite vs GPS Tour

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Theodolite

This app combines a compass, inclinometer, rangefinder, GPS, and map with augmented reality features. Capture photos and videos with overlaid geographical data, and navigate using detailed offline maps. Share locations and collaborate with others for various outdoor and professional uses.

Highlights
  • Augmented reality viewfinder
  • Compass and inclinometer
  • GPS and map navigation
  • Data-overlay photo/video camera
  • Offline map support
  • Rangefinder and nav calculator
  • Coordinate system support
Currently charting
Read full description

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. 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 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!

About

GPS Tour

Navigate to specific coordinates with a user-friendly GPS app. Save and manage multiple locations within profiles for tours, and track your position, speed, and direction even offline. Ideal for outdoor enthusiasts.

Highlights
  • Navigate to target coordinates
  • Create and manage location profiles
  • Offline GPS tracking
  • Supports various coordinate formats
  • Adjustable GPS accuracy
  • Monitor position, speed, and direction
Features
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GPS Tour is a sophisticated yet user-friendly GPS app that leads you to your target coordinates. Simply enter the coordinates of your destinations and follow the compass. Add locations in one profile to mark all the important stages of your tour. The App will use the coordinates of your tags and your current position to lead you to the location of your choice. You can easily save your location tags and the tour profile to store it on your device. Load, edit and use your tour profiles and location tags any time and wherever you want. GPS Tour supports coordinates in any combination of degrees, minutes or seconds. You can choose between feet and meter and can even adjust the GPS tracking accuracy. With GPS Tour you will be able to monitor your current position (coordinates and on the map), altitude, speed, moving direction and the orientation of your device - even if you are not connected to the internet. This App is especially designed but not limited to people performing outdoor and off-road sports such as climbing, biking, hiking, skiing, motocross, hunting, fishing, sailing, kayaking, rowing etc. Note: GPS Tour works fully without internet connection (offline). This is true for everything but the fetching of new map pictures that have not been loaded with connected previously; all tags and your current position will still be displayed! Disclaimer: Some iOS devices do not support all of the features offered by GPS Tour. GPS Tour and its producers do not assume liability for the accuracy and usefulness of the information displayed and provided in this application. Users who base decisions on information given by this application do so at their own risk.

Screenshots

Theodolite4 screens
GPS Tour4 screens

Verdict

The call

The clearest difference is price: GPS Tour at Free against Theodolite's $8.99. GPS Tour also leads on update cadence (every 2 months vs every 4 months) and iOS requirement (9.0 vs 15.6). Theodolite's advantage is rating (4.7 vs 3.6) and ratings volume (906 vs 27). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

GPS Tour is free to download; Theodolite costs $8.99 up front. Theodolite sells 8 one-off in-app purchases and GPS Tour sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Theodolite holds the better App Store score, 4.7 against 3.6. That said, the two scores are not equally well evidenced: Theodolite has 906 ratings behind it against 27, so its average is the more settled of the two. Written reviews point the same way: 88% of Theodolite's written reviews are positive against 81% of GPS Tour's.

UpkeepUpdate frequency

Theodolite ships an update every 4 months, GPS Tour every 2 months. The most recent releases landed on November 10, 2026 and November 1, 2026 respectively.

Scorecard6 real differences · 5 level
Theodolite versus GPS Tour: the parameters behind the verdict, then further details
ParameterTheodoliteGPS Tour
Price$8.99Free — better
Rating4.7 (906 ratings) — better3.6 (27 ratings)
Positive reviews87.8% of reviews — better81.5% of reviews
Number of ratings906 — better27
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#7 — better—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.69.0 — better
Further details — not scored
Size30 MB130 MB
Age rating4+4+
DeveloperCraig HunterAppicDesign

Customer experience

Theodolite

All ratings902 ratings
Positive92.8%
Neutral2.9%
Negative4.3%
Written reviews476 reviews
Positive87.8%
Neutral4.8%
Negative7.4%

GPS Tour

All ratings27 ratings
Positive63.0%
Neutral11.1%
Negative25.9%
Written reviews135 reviews
Positive81.5%
Neutral7.4%
Negative11.1%

Bugs and requests

Theodolite

Not enough reviews yet to summarise bugs or requests.

GPS Tour

Reported bugs

3 issues
  • Coordinates change when saving
  • App crashes or becomes unusable after updates
  • Inability to import/export data properly

Requested features

4 requests
  • Add ability to manually enter coordinates
  • Improve coordinate display to support N/W format
  • Implement tracking feature with ability to drop pins on map
  • Increase maximum number of saved locations

In-app purchases

8 purchases

Theodolite

One-time8
  • 1,000 Outdoors Map Tiles$0.99
  • Team Tracking$1.99
  • World Datum Pack$2.99
Show 5 more
  • US Mountain Summits AR Layer$2.99
  • 5,000 Outdoors Map Tiles$4.99
  • 10,000 Outdoors Map Tiles$8.99
  • 20,000 Outdoors Map Tiles$17.99
  • US State Plane Coordinates$24.99
1 purchases

GPS Tour

One-time1
  • Full Version$1.99

Questions

Is Theodolite free?
Theodolite costs $8.99, and also offers in-app purchases.
Is GPS Tour free?
GPS Tour is free to download, with in-app purchases available.
Which has better reviews, Theodolite or GPS Tour?
Theodolite is rated higher. Theodolite averages 4.7 out of 5 from 906 ratings, while GPS Tour averages 3.6 from 27 ratings.
Do Theodolite or GPS Tour have ads?
Neither Theodolite nor GPS Tour shows ads.
Which is updated more often, Theodolite or GPS Tour?
Theodolite ships an update every 4 months, and GPS Tour every 2 months. Most recently, Theodolite was updated on November 10, 2026 and GPS Tour on November 1, 2026.

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