Comparison

GasSCAN vs Diamond Maps Offline

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

Head to head
About

GasSCAN

Scan barcodes or QR codes that comply with ASTM F2897 standards. The app records scan data along with GPS location, allowing for easy export of scan lists in CSV format for GIS integration.

Highlights
  • ASTM F2897 barcode scanning
  • QR code scanning
  • GPS data logging
  • Scan history storage
  • CSV export
  • ArcGIS Online integration
Features
Read full description

An application to allow the scanning of a barcode or QR code that meets ASTM F2897 standard. Application stores all scans and includes GPS data while scanning. Once a list of scans has been completed, a user can export the scans in csv format and email to someone else. The csv is structured in such a way that it can be uploaded directly into ArcGIS Online to produce barcodes in a GIS format.

About

Diamond Maps Offline

Access and modify your Diamond Maps offline. Download maps to your device, make changes, and sync them back to the cloud when you have an internet connection. Ideal for fieldwork when connectivity is limited.

Highlights
  • Download maps for offline use
  • View and edit map features
  • Mark new points
  • Sync changes to the cloud
  • Turn map layers on and off
Features
Read full description

Diamond Maps Offline is an app that allows existing Diamond Maps users to download their maps from the cloud to their iOS device for use offline. Using this app you can view your map, turn layers on and off, make changes to any feature, and mark new points. Then when you are back at the office you can use the "Sync" button to upload your changes to the Diamond Maps cloud where they will be accessible to the rest of your team. The regular browser-based Diamond Maps application is still the flagship product where you must go to create layers, change colors, modify your field layout, draw lines, etc. The offline app is a less functional version that allows you to do basic data collection and viewing offline. How it works 1. These instructions assume you already have a Diamond Maps account. 2. Install this app on your tablet or phone. 3. Run the app and enter your Diamond Maps user name and password. 4. Select which map(s) you want to download to your phone/tablet. 5. Open your map, view it, make changes, add new points, etc. 6. When you are ready to upload your changes click Menu, then click Offline Maps, then click the 'Sync' button next to your map name. This will upload your edits and download any changes that others have made.

Screenshots

GasSCAN3 screens
Diamond Maps Offline3 screens

Verdict

The call

The clearest difference is update cadence: Diamond Maps Offline at every 3 weeks against GasSCAN's every 4 months. On price, rating, ratings volume and ads 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for GasSCAN against 5.0 for Diamond Maps Offline. Both are backed by a comparable volume of ratings — 8 and 4 respectively.

UpkeepUpdate frequency

GasSCAN ships an update every 4 months, Diamond Maps Offline every 3 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard1 real difference · 9 level
GasSCAN versus Diamond Maps Offline: the parameters behind the verdict, then further details
ParameterGasSCANDiamond Maps Offline
PriceFreeFree
Rating4.9 (8 ratings)5.0 (4 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings8 — better4
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size517 MB80 MB
Age rating4+4+
DeveloperMagnolia RiverBen Hill

Customer experience

GasSCAN

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Diamond Maps Offline

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

GasSCAN

No in-app purchases

None

Diamond Maps Offline

No in-app purchases

Questions

Is GasSCAN free?
GasSCAN is free to download, with no in-app purchases.
Is Diamond Maps Offline free?
Diamond Maps Offline is free to download, with no in-app purchases.
Which has better reviews, GasSCAN or Diamond Maps Offline?
Diamond Maps Offline is rated higher. GasSCAN averages 4.9 out of 5 from 8 ratings, while Diamond Maps Offline averages 5.0 from 4 ratings.
Do GasSCAN or Diamond Maps Offline have ads?
Neither GasSCAN nor Diamond Maps Offline shows ads.
Which is updated more often, GasSCAN or Diamond Maps Offline?
GasSCAN ships an update every 4 months, and Diamond Maps Offline every 3 weeks. Most recently, GasSCAN was updated on November 2, 2026 and Diamond Maps Offline on November 3, 2026.

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