Comparison

Tomstrails GPS UTM vs Global Mapper Mobile

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

Head to head
About

Tomstrails GPS UTM

This app provides precise UTM grid references and displays your location on topographic maps. It works offline, supports various regional datums, and offers multiple coordinate formats for easy sharing and use in other applications.

Highlights
  • Fast and accurate UTM grid reference
  • Locate position on topographic maps
  • Works without phone signal
  • Supports regional datums (e.g., ED50)
  • Multiple coordinate formats (1m, 10m, 100m)
  • Share coordinates with other apps
  • High contrast display for readability
Read full description

GPS UTM displays a fast and accurate UTM grid reference. Locate your position on topographic maps. GPS UTM supports many of the regional datums used around the world including ED50. ∙ No phone signal required - works in the most remote locations. ∙ 1 metre, 10 metre and 100 metre formats. ∙ Paste your coordinate into other apps or share with other people. ∙ A large, clear, high contrast display ensures you can easily read your position in any light conditions. ∙ Optimal battery use based on speed of travel and current charge level ensures all day use. ∙ No Adverts. GPS UTM - know where you are.

About

Global Mapper Mobile

This application allows users to view and collect GIS data in the field using their mobile device's GPS. It supports various data layers and offers tools for drawing, tracking, and form-based data collection, with advanced features available through an in-app purchase.

Highlights
  • Vector, raster, and terrain data display
  • GPS location display and feature creation
  • Drawing, tracking, and form-based data collection
  • Image capture and Picture Point creation
  • Advanced GPS support for GNSS devices
  • RTK correction via NTRIP client
  • Offline data access and custom online sources
Features
Read full description

Bring your GIS workflow to the field. Global Mapper Mobile® is a powerful iOS application for viewing and collecting GIS data. It utilizes the GPS capabilities of mobile devices to provide situational awareness and locational intelligence for remote mapping projects. A perfect complement to the desktop version of Global Mapper, the mobile app provides maps-in-hand functionality for engineers, surveyors, wildlife managers, foresters, and anyone whose job requires access to spatial data in remote locations. Global Mapper Mobile can display vector, raster, and elevation data layers that have been transferred from the desktop version of the software. It also provides tools for drawing, tracking, and form-based data collection using pre-configured attributes and picklists. Global Mapper Mobile Base Version (Free) The base version of Global Mapper Mobile is free of charge and provides an array of features and functions, including: • Vector, raster, and terrain data display • GPS location display • Point, line, and polygon feature creation using GPS location • Editing of existing vector features • Capture of images in the field • Creation of Picture Points from geotagged images • Attribute and feature notation recording for new or existing vector features • Online access to Open Street Map data Global Mapper Mobile Pro The Pro version of Global Mapper Mobile, available as an in-app purchase, supplements the functionality of the base version with an array of professional-grade tools, including: • Advanced GPS support for connection to high-accuracy GNSS devices from vendors such as Bad Elf, EOS, Juniper, and others • RTK correction via built-in NTRIP client • GPS Averaging • Terrain shader and water level display options • Custom online source options and online data saving for offline use • Simultaneous feature creation • Viewshed creation • Volume calculation • Data reprojection • Address searching • Geopackage and GeoPDF format support Global Mapper Mobile Pro is available as an in-app purchase. The license is based on an annual subscription from the date of purchase that can be renewed each year. Note: Continued use of GPS running in the background can dramatically decrease battery life. Privacy Policy: https://www.bluemarblegeo.com/privacy-policy/ Terms of Use: https://www.bluemarblegeo.com/licensing-policy/

Screenshots

Tomstrails GPS UTM3 screens
Global Mapper Mobile4 screens

Verdict

The call

The clearest difference is review sentiment: Tomstrails GPS UTM at 84% against Global Mapper Mobile's 29%. Tomstrails GPS UTM also leads on rating (4.8 vs 3.7) and ratings volume (1.6K vs 15). Global Mapper Mobile's advantage is device support (3 vs 1) and iOS requirement (12.2 vs 18.0). On price, 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

Both are free to download. Tomstrails GPS UTM sells 1 one-off in-app purchase and Global Mapper Mobile sells 1 in-app purchase, starting at $49.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Tomstrails GPS UTM holds the better App Store score, 4.8 against 3.7. That said, the two scores are not equally well evidenced: Tomstrails GPS UTM has 1.6K ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 84% of Tomstrails GPS UTM's written reviews are positive against 29% of Global Mapper Mobile's.

UpkeepUpdate frequency

Tomstrails GPS UTM ships an update every 6 weeks, Global Mapper Mobile every 4 months. Both last shipped on October 24, 2026.

Scorecard6 real differences · 4 level
Tomstrails GPS UTM versus Global Mapper Mobile: the parameters behind the verdict, then further details
ParameterTomstrails GPS UTMGlobal Mapper Mobile
PriceFreeFree
Rating4.8 (1.6K ratings) — better3.7 (15 ratings)
Positive reviews83.8% of reviews — better28.6% of reviews
Number of ratings1.6K — better15
Update frequencyEvery 6 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS18.012.2 — better
Further details — not scored
Size8 MB126 MB
Age rating4+4+
DeveloperTomstrails.comBlue Marble Geographics

Customer experience

Tomstrails GPS UTM

All ratings1,607 ratings
Positive94.3%
Neutral2.6%
Negative3.1%
Written reviews154 reviews
Positive83.8%
Neutral7.1%
Negative9.1%

Global Mapper Mobile

All ratings15 ratings
Positive73.3%
Neutral0.0%
Negative26.7%
Written reviews7 reviews
Positive28.6%
Neutral14.3%
Negative57.1%

Bugs and requests

Tomstrails GPS UTM

Reported bugs

2 issues
  • Stopped working after iOS update
  • UTM grids were off initially, required setting changes

Requested features

4 requests
  • Add support for Morocco coordinate system
  • Add option to average readings and hold the result
  • Add option to reduce coordinate display to 6 digits for emergency use
  • Bring back previous features like degrees/minutes display and ability to edit messages

Global Mapper Mobile

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Tomstrails GPS UTM

One-time1
  • Feature PackFree
1 purchases

Global Mapper Mobile

Subscriptions1
  • Pro Module$49.991 Year

Questions

Is Tomstrails GPS UTM free?
Tomstrails GPS UTM is free to download, with in-app purchases available.
Is Global Mapper Mobile free?
Global Mapper Mobile is free to download, with in-app purchases available.
Which has better reviews, Tomstrails GPS UTM or Global Mapper Mobile?
Tomstrails GPS UTM is rated higher. Tomstrails GPS UTM averages 4.8 out of 5 from 1.6K ratings, while Global Mapper Mobile averages 3.7 from 15 ratings.
Do Tomstrails GPS UTM or Global Mapper Mobile have ads?
Neither Tomstrails GPS UTM nor Global Mapper Mobile shows ads.
Which is updated more often, Tomstrails GPS UTM or Global Mapper Mobile?
Tomstrails GPS UTM ships an update every 6 weeks, and Global Mapper Mobile every 4 months. Most recently, Tomstrails GPS UTM was updated on October 24, 2026 and Global Mapper Mobile on October 24, 2026.

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