GasSCAN vs Diamond Maps Offline
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- ASTM F2897 barcode scanning
- QR code scanning
- GPS data logging
- Scan history storage
- CSV export
- ArcGIS Online integration
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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.
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.
- Download maps for offline use
- View and edit map features
- Mark new points
- Sync changes to the cloud
- Turn map layers on and off
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | GasSCAN | Diamond Maps Offline |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (8 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 8 — better | 4 |
| Update frequency | Every 4 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 517 MB | 80 MB |
| Age rating | 4+ | 4+ |
| Developer | Magnolia River | Ben Hill |
Customer experience
GasSCAN
Diamond Maps Offline
In-app purchases
GasSCAN
No in-app purchases
Diamond Maps Offline
No in-app purchases
Questions
Is GasSCAN free?
Is Diamond Maps Offline free?
Which has better reviews, GasSCAN or Diamond Maps Offline?
Do GasSCAN or Diamond Maps Offline have ads?
Which is updated more often, GasSCAN or Diamond Maps Offline?
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