Comparison

Strike and Dip vs Theodolite

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

Head to head
About

Strike and Dip

This app functions as a pocket geological tool, enabling users to record strike and dip measurements, bearings, and plunge angles. It also provides real-time location data like latitude, longitude, and elevation, with the ability to save notes and attach photos. Integrated maps display saved data points, and the app offers extensive customization for measurement formats.

Highlights
  • Record strike, dip, and plunge
  • Get real-time GPS coordinates
  • Save measurements with notes and photos
  • View data on integrated maps
  • Customizable measurement formats
  • Supports azimuth and quadrant bearings
Read full description

Strike and Dip turns your iPhone into a pocket transit. Take strike & dip measurements, bearings, plunge, and all that geological goodness, while simultaneously getting your latitude, longitude, and elevation. Save your measurements as notes, and add photos to your notes. Now also with maps (geological in the U.S. and some other parts of the world) that show the locations of all your saved data. Customizable to how you work: choose between azimuth and quadrant formats for bearings, three formats for coordinates, meters and feet, and three different formats for strike and dip.

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
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!

Screenshots

Strike and Dip4 screens
Theodolite4 screens

Verdict

The call

The clearest difference is review sentiment: Theodolite at 88% against Strike and Dip's 46%. Theodolite also leads on ratings volume (906 vs 2) and chart position (#7 vs unranked). Strike and Dip's advantage is in-app purchases (none vs 8) and rating (5.0 vs 4.7). On ads and device support 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

Strike and Dip costs $4.99 and Theodolite $8.99 up front. Theodolite sells 8 one-off in-app purchases. Strike and Dip asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Strike and Dip holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Theodolite has 906 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 46% of Strike and Dip's written reviews are positive against 88% of Theodolite's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Strike and Dip ships an update every 9 months, Theodolite every 4 months. Both last shipped on October 27, 2026.

Scorecard9 real differences · 2 level
Strike and Dip versus Theodolite: the parameters behind the verdict, then further details
ParameterStrike and DipTheodolite
Price$4.99 — better$8.99
Rating5.0 (2 ratings) — better4.7 (906 ratings)
Positive reviews46.2% of reviews87.8% of reviews — better
Number of ratings2906 — better
Update frequencyEvery 9 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank—#7 — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS26.015.6 — better
Further details — not scored
Size11 MB30 MB
Age rating4+4+
DeveloperHunt Mountain SoftwareCraig Hunter

Customer experience

Strike and Dip

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews13 reviews
Positive46.2%
Neutral7.7%
Negative46.2%

Theodolite

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

In-app purchases

None

Strike and Dip

No 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

Questions

Is Strike and Dip free?
Strike and Dip costs $4.99, with no in-app purchases.
Is Theodolite free?
Theodolite costs $8.99, and also offers in-app purchases.
Which has better reviews, Strike and Dip or Theodolite?
Strike and Dip is rated higher. Strike and Dip averages 5.0 out of 5 from 2 ratings, while Theodolite averages 4.7 from 906 ratings.
Do Strike and Dip or Theodolite have ads?
Neither Strike and Dip nor Theodolite shows ads.
Which is updated more often, Strike and Dip or Theodolite?
Strike and Dip ships an update every 9 months, and Theodolite every 4 months. Most recently, Strike and Dip was updated on October 27, 2026 and Theodolite on October 27, 2026.

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