Comparison

Gemma GPS vs UTM Maps

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

Head to head
About

Gemma GPS

Navigate the outdoors with a digital compass that conserves battery. Save locations and get guided back to them with a simple arrow. Ideal for travelers, hikers, sailors, and geocachers who venture off the beaten path.

Highlights
  • Digital compass
  • Battery saving mode
  • Save locations
  • Night vision mode
  • Navigation guidance
Features
Read full description

Precision GPS waypoint navigation for professionals. Capture locations. Convert coordinates. Navigate back. FEATURES: • Save waypoints with geodetic precision • Six coordinate formats: Decimal, DDM, DMS, UTM, MGRS, Maidenhead • Compass navigation with bearing and distance • Organize with folders and routes • Import and export GPX files • Full JSON backup and restore • Night vision mode for dark adaptation • No ads, no tracking COORDINATE FORMATS: • Decimal Degrees (37.7749°) • Degrees Decimal Minutes (37° 46.497' N) • Degrees-Minutes-Seconds (37°46'29.7"N) • UTM (10S 551309 4177447) • MGRS (10SEG 51309 77447) • Maidenhead Grid (CM87ss) Perfect for search and rescue, surveying, geocaching, amateur radio, aviation, marine navigation, and anyone who needs real coordinates. Every feature is free. Optional support subscriptions help fund continued development. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

UTM Maps

This app allows users to work with various coordinate systems, including UTM and MGRS, on a map. It supports registering points with addresses, capturing photos with watermarks, and measuring distances and areas. Data can be exported to CSV or KML formats.

Highlights
  • UTM, MGRS, Lat/Lon coordinate support
  • Point registration with geocoding
  • Photo capture with coordinate watermark
  • Area and distance measurement
  • Data export to CSV and KML
  • Field navigation with compass and GPS
Features
Read full description

A simple APP for working with Latitude Longitude, UTM and MGRS coordinates, Maps and GPS. Register points to be displayed on a map or stored in a database complete with readable address data (geocoding). Capture photo with a watermark containing point name, coordinates and address information. Measure area, distance and registering lines and polygons. Export saved data to CSV or KML file format or locate points in the field using your built-in device's compass and GPS or with generating direction route. Register Points UTM Maps allows you to register points and stored in database to display on the map or export to a CSV file. Stored point data will automatically completed with UTM coordinates and readable address (geocoding requires internet access). Searching for Coordinates You can search for Latitude, Longitude, UTM, or MGRS coordinates to display on a map or find them in the field using a compass or Direction Route. Measure Area And Distance No need to go to the field anymore; now you can measure area and distance with various units using this application. Stores line and polygon data in database and displays it on a map. Export lines and polygons data to KML file. Data Properties / Point Details Each data displayed on the map has its own properties, making it easier to navigate and understand. Simply click on a point and the data properties will automatically appear. Find Point On The Field / Stake Out Now you can find coordinates or location in the field easily, the application will direct you to the desired coordinate point with the help of the built-in compass on your device or using Direction Route. Add Photo Add a photo from camera or library complete with a watermark containing name, coordinates and address information. Data List & Export The data list is designed to view data stored in the database, delete unnecessary data, find the location of data in the field or export data to a file. Point data can be exported to CSV files, while line and polygon data can be exported to KML files for use in other software or other devices.

Screenshots

Gemma GPS4 screens
UTM Maps4 screens

Verdict

The call

The clearest difference is ads: Gemma GPS at none against UTM Maps's shown. Gemma GPS also leads on monetization model (free vs free with in-app purchases). UTM Maps's advantage is update cadence (every 10 days vs every 2 months) and review sentiment (100% vs 86%). On price, rating, in-app purchases 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

Both are free to download. Gemma GPS sells 2 in-app purchases, starting at $199.99 per year and UTM Maps sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Gemma GPS against 5.0 for UTM Maps. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews are what separate them: 86% of Gemma GPS's written reviews are positive against 100% of UTM Maps's.

UpkeepUpdate frequency

Gemma GPS ships an update every 2 months, UTM Maps every 10 days. The most recent releases landed on August 6, 2026 and August 15, 2026 respectively.

Scorecard5 real differences · 5 level
Gemma GPS versus UTM Maps: the parameters behind the verdict, then further details
ParameterGemma GPSUTM Maps
PriceFreeFree
Rating5.0 (1 ratings)5.0 (4 ratings)
Positive reviews85.7% of reviews100.0% of reviews — better
Number of ratings14 — better
Update frequencyEvery 2 monthsEvery 10 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS18.017.6 — better
Further details — not scored
Size54 MB20 MB
Age rating4+4+
DeveloperPatrick TudorYogi Yogantara

Customer experience

Gemma GPS

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive85.7%
Neutral14.3%
Negative0.0%

UTM Maps

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Gemma GPS

Subscriptions2
  • Gemma GPS Pro Support$199.991 Year
  • Gemma GPS Enterprise Support$499.991 Year
4 purchases

UTM Maps

Subscriptions4
  • Remove Ads 1 Month$0.991 Month
  • Elevation (1 Month)$1.991 Month
  • Elevations (3 Months)$3.993 Months
Show 1 more
  • Remove Ads 1 Year$5.991 Year

Questions

Is Gemma GPS free?
Gemma GPS is free to download, with in-app purchases available.
Is UTM Maps free?
UTM Maps is free to download, with in-app purchases available.
Which has better reviews, Gemma GPS or UTM Maps?
Gemma GPS and UTM Maps are both rated 5.0 out of 5 on the App Store, from 1 and 4 ratings respectively.
Do Gemma GPS or UTM Maps have ads?
UTM Maps shows ads; Gemma GPS does not.
Which is updated more often, Gemma GPS or UTM Maps?
Gemma GPS ships an update every 2 months, and UTM Maps every 10 days. Most recently, Gemma GPS was updated on August 6, 2026 and UTM Maps on August 15, 2026.

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