Comparison

Coordinates vs GPS OS Grid Reference

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

GPS OS Grid Reference

This app accurately pinpoints your location on Ordnance Survey maps for Great Britain and Ireland, even without a phone signal. It offers precise grid references, waypoint creation, and navigation features. The display is designed for clarity in all lighting conditions, and it optimizes battery usage.

Highlights
  • Offline map location
  • Accurate grid references
  • Waypoint creation and management
  • High-contrast display
  • Battery optimization
  • Share waypoints
Features
Read full description

GPS OS provides a fast and accurate way to locate your position on an Ordnance Survey map, both in Great Britain and Ireland. • No phone signal required - works in the most remote locations. • OSTN15 transform data for high conversion accuracy (better than 1m). • 6, 8 and 10 figure grid references. • A large, clear, high contrast display ensures you can easily read your position in any light conditions. • Optimises the frequency of position updates depending on battery charge and speed of travel to make sure you can always make calls at the end of the day. • Create waypoints from a map, your current location or manually enter Ordnance Survey coordinates. • Explore waypoints and get directions in Apple Maps. • Share waypoints with other apps or users. • No adverts. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Includes OSTN15 transform data licensed with permission. Copyright and database rights Ordnance Survey Limited 2016, ©Crown copyright and database rights Land and Property Services 2016 and/or ©Ordnance Survey Ireland, 2016. All rights reserved.

Screenshots

Coordinates4 screens
GPS OS Grid Reference4 screens

Verdict

The call

The clearest difference is ads: GPS OS Grid Reference at none against Coordinates's shown. GPS OS Grid Reference also leads on review sentiment (90% vs 63%). Coordinates's advantage is ratings volume (6.6K vs 17) and update cadence (monthly vs every 3 months). On price, rating, 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. Coordinates sells 6 in-app purchases, starting at $1.99 per month and GPS OS Grid Reference sells 2 in-app purchases, starting at $5.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Coordinates holds the better App Store score, 4.6 against 4.4. That said, the two scores are not equally well evidenced: Coordinates has 6.6K ratings behind it against 17, so its average is the more settled of the two. Written reviews complicate that: 63% of Coordinates's written reviews are positive against 90% of GPS OS Grid Reference's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Coordinates ships an update monthly, GPS OS Grid Reference every 3 months. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.

Scorecard6 real differences · 4 level
Coordinates versus GPS OS Grid Reference: the parameters behind the verdict, then further details
ParameterCoordinatesGPS OS Grid Reference
PriceFreeFree
Rating4.6 (6.6K ratings) — better4.4 (17 ratings)
Positive reviews63.4% of reviews89.9% of reviews — better
Number of ratings6.6K — better17
Update frequencyMonthly — betterEvery 3 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, Apple Watch
Requires iOS15.6 — better18.0
Further details — not scored
Size99 MB13 MB
Age rating4+4+
DeveloperMapnitude Company LimitedTomstrails.com

Customer experience

Coordinates

All ratings6,618 ratings
Positive91.7%
Neutral4.3%
Negative4.0%
Written reviews175 reviews
Positive63.4%
Neutral9.1%
Negative27.4%

GPS OS Grid Reference

All ratings17 ratings
Positive82.4%
Neutral5.9%
Negative11.8%
Written reviews99 reviews
Positive89.9%
Neutral1.0%
Negative9.1%

User reviews

Coordinates

From 6.6K App Store ratings

What we love

  • 🚀 Accurate location finding
  • 👍 Simple and easy to use
  • 💡 Supports multiple coordinate formats
  • 🚀 Works well overseas
  • 👍 Helpful for environmental research

Room to improve

  • 🐛 Occasional bugs and crashes
  • 💰 Expensive subscription to remove ads
  • 🤔 Confusing or unintuitive user interface
  • 🔍 Difficulty finding small locations
  • 🙄 Ads covering important information

GPS OS Grid Reference

From 17 App Store ratings

What we love

  • 👍 Simple and easy to use
  • 🎯 Accurate grid references
  • 🚀 Fast and quick updates
  • 💡 Works without phone signal
  • 🗺️ Useful for navigation and backup

Room to improve

  • 🐛 Blurry satellite maps
  • 🧭 Compass not accurate
  • 📉 Accuracy dropped recently
  • 🗺️ No map data included
  • 🚫 Cannot search locations

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

GPS OS Grid Reference

Reported bugs

5 issues
  • Waypoint finder satellite view is blurry
  • Compass is not accurate
  • Accuracy has dropped recently
  • Location services permanently dimmed off (iOS)
  • App does not work for users not in England

Requested features

10 requests
  • Add map data and search functionality
  • Improve satellite map clarity
  • Add ability to view location on a map
  • Enable navigation from point to point
  • Add Apple Watch equivalent app
Show 5 more
  • Display latitude and longitude
  • Add a dynamic display for accuracy improvement
  • Implement time averaging for accuracy
  • Allow copying grid reference to clipboard
  • Add facility to store and recall reference information

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

GPS OS Grid Reference

Subscriptions1
  • Premium Features7 Days trial$5.991 Year
One-time1
  • Feature Pack - Compass & sharing features.Free

Questions

Is Coordinates free?
Coordinates is free to download, with in-app purchases available.
Is GPS OS Grid Reference free?
GPS OS Grid Reference is free to download, with in-app purchases available.
Which has better reviews, Coordinates or GPS OS Grid Reference?
Coordinates is rated higher. Coordinates averages 4.6 out of 5 from 6.6K ratings, while GPS OS Grid Reference averages 4.4 from 17 ratings.
Do Coordinates or GPS OS Grid Reference have ads?
Coordinates shows ads; GPS OS Grid Reference does not.
Which is updated more often, Coordinates or GPS OS Grid Reference?
Coordinates ships an update monthly, and GPS OS Grid Reference every 3 months. Most recently, Coordinates was updated on October 12, 2026 and GPS OS Grid Reference on October 14, 2026.

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