Comparison

Coordinates vs Gemma GPS

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

Head to head
About

Coordinates

This app is a versatile tool for converting and managing geographic coordinates. It supports numerous global formats and datums, allowing users to view, input, and save locations with rich details. Ideal for professionals and outdoor enthusiasts needing precise location data.

Highlights
  • Coordinate conversion (UTM, MGRS, Georef, etc.)
  • Batch conversion of multiple coordinates
  • Add notes, photos, and media to saved locations
  • Datum conversion with PROJ.4 support
  • Real-time navigation and tracking
  • Offline map tile downloads
  • Import/export GPX, GeoJSON, KML files
Features
Read full description

Coordinates is a powerful and user-friendly tool for anyone working with geographic locations — from travelers and surveyors to engineers and GIS professionals. Instantly view, convert, and manage coordinates in a wide range of global formats and datums, all within a clean and intuitive interface. Whether in the field or at the desk, Coordinates is your all-in-one solution for precise location work. # User-friendly Design Your current location is displayed at the intersection of two grey lines, with clear latitude and longitude readouts. You can manually set the location using map taps, coordinate input, or place search. Intuitive buttons give quick access to measurement tools, map layers, location bookmarking, shape drawing, and annotation — all from a clean, compact interface. # Various Coordinate Formats Supports formats like UTM, MGRS, Georef, and more alongside Longitude/Latitude. # Batch Converter Quickly convert multiple coordinates or files in one streamlined action. # Rich Object Details Add notes, photos, and media to any saved object — pins, shapes, or measurements — to keep your data organized and context-rich. Easily share your saved content across devices using backup and export tools. # Datum Conversion Transform coordinates using EPSG, ESRI, and IAU2000 references. Supports X/Y, geodetic, and projected systems. # PROJ.4 Calculator Convert coordinates between systems using the PROJ.4 library, with support for datum shifting and custom projections. # Navigation & Tracking Real-time bearing and distance updates are provided with a large coordinate readout, ideal for on-the-field usage. # Speedometer Track your current speed in real time. # Unit Converter Convert 40+ units (distance, pressure, radiation, etc.) # Signal Board Send big bold messages on-screen # Elevation Support Altitude data is available for land areas # Import / Export - .gpx .geojson .kml file supported # Distance, Bearing & Area Mark points or draw lines to measure distance, bearings, and area. # Offline Map Tiles Download tiles for offline use. Pick a city or define your own area. # Custom Map Tile Selector Choose from Apple Maps, OSM, or add your own tile server with {z}/{x}/{y} format. # Supported Input / Output # Latitude and Longitude DD/DM/DMS Standard UTM NATO UTM MGRS / USNG Georef QTH Locator / Maidenhead (WGS84) World Mercator (WGS84) Web Mercator Geohash what3words Global Area Reference System (GARS) Ordnance Survey National Grid [BNG] OSGB36 ISO 6709 Natural Area Code Irish Grid Reference / Coordinates Plus Code (Open Location Code) Mapcode Dutch Grid ECEF Indian Kalianpur 1975 Open Postcode Geohash-36 Guatemala GTM RT90 SWEREF99 Indian 1975 QND95 / Qatar National Grid IRENET95 / Irish Transverse Mercator KOSOVAREF01 HD 72 / EOV Kertau (RSO) / RSO Malaya Timbalai 1948 / RSO Borneo EST97 Estonian 1997 LKS92 / Latvia TM NZGD49 NZGD2000 CH1903/+ GGRS87 ETRS89-extended / LAEA Europe NTF (Paris) / Lambert zone II French DFCI Grid ARINC 424 FMS ARC1950 Pulkovo 1942 / SK42 PZ-90 H3 Placekey GDM2000 JGD2011 KUDAMS/KTM World Magnetic Model / WMM 2015v2 PRS92 / Philippines Search by name Photo metadata Proj.4 formats Street Address # Subscriptions # “Coordinates – GPS Converter” including most of its features, is completely FREE to use. You can subscribe to this application to remove ads Price may vary by location. Payment for subscriptions will be charged to your iTunes Account at confirmation of purchase Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Subscriptions may be managed by going to your iTunes Account Settings after purchase or by clicking the “Purchase / Manage Subscription. Auto-renewal may be turned off by going to Account Settings after purchase. Subscription cannot be cancelled during the active subscription period Privacy policy: https://mapnitude.com/privacy-policy Terms of use: https://mapnitude.com/terms-of-service

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/

Screenshots

Coordinates4 screens
Gemma GPS4 screens

Verdict

The call

The clearest difference is ads: Gemma GPS at none against Coordinates's shown. Gemma GPS also leads on rating (5.0 vs 4.6) and monetization model (free vs free with in-app purchases). Coordinates's advantage is ratings volume (6.8K vs 1) and iOS requirement (15.6 vs 18.0). On price, update cadence, 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. Coordinates sells 6 in-app purchases, starting at $1.99 per month and Gemma GPS sells 2 in-app purchases, starting at $199.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Gemma GPS holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Coordinates has 6.8K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 64% of Coordinates's written reviews are positive against 86% of Gemma GPS's.

UpkeepUpdate frequency

Coordinates ships an update monthly, Gemma GPS every 2 months. The most recent releases landed on October 29, 2026 and October 14, 2026 respectively.

Scorecard6 real differences · 4 level
Coordinates versus Gemma GPS: the parameters behind the verdict, then further details
ParameterCoordinatesGemma GPS
PriceFreeFree
Rating4.6 (6.8K ratings)5.0 (1 ratings) — better
Positive reviews63.6% of reviews85.7% of reviews — better
Number of ratings6.8K — better1
Update frequencyMonthly — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, Apple Watch
Requires iOS15.6 — better18.0
Further details — not scored
Size107 MB54 MB
Age rating4+4+
DeveloperMapnitude Company LimitedPatrick Tudor

Customer experience

Coordinates

All ratings6,716 ratings
Positive91.6%
Neutral4.3%
Negative4.1%
Written reviews176 reviews
Positive63.6%
Neutral9.1%
Negative27.3%

Gemma GPS

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

Bugs and requests

Coordinates

Reported bugs

5 issues
  • Coordinate display issues (e.g., UTM showing incorrect hemisphere)
  • App crashing or freezing on launch
  • Inability to delete drawn lines or markers
  • Coordinate conversion not working as expected
  • Compatibility issues with newer iPhone models

Requested features

6 requests
  • Navigation and routing functionality
  • Support for What3Words coordinate system
  • Option to set preferred coordinate format as default
  • Ability to enter addresses or intersections to get coordinates
  • Add altitude information to saved locations
Show 1 more
  • Offline mode for areas without cellular coverage

Gemma GPS

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

Coordinates

Subscriptions6
  • Plus Upgrade$1.991 Month
  • Plus Upgrade$2.991 Month
  • Plus Upgrade$9.996 Months
Show 3 more
  • Plus Upgrade$15.996 Months
  • Plus Upgrade$17.991 Year
  • Plus Upgrade$28.991 Year
2 purchases

Gemma GPS

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

Questions

Is Coordinates free?
Coordinates is free to download, with in-app purchases available.
Is Gemma GPS free?
Gemma GPS is free to download, with in-app purchases available.
Which has better reviews, Coordinates or Gemma GPS?
Gemma GPS is rated higher. Coordinates averages 4.6 out of 5 from 6.8K ratings, while Gemma GPS averages 5.0 from 1 ratings.
Do Coordinates or Gemma GPS have ads?
Coordinates shows ads; Gemma GPS does not.
Which is updated more often, Coordinates or Gemma GPS?
Coordinates ships an update monthly, and Gemma GPS every 2 months. Most recently, Coordinates was updated on October 29, 2026 and Gemma GPS on October 14, 2026.

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