Diamond Maps Offline vs Sentry BLE
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Sentry BLE
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This application is a configuration tool for Vision Metering GLS005 MIU. Unauthorized use is strictly prohibited.
Screenshots
Verdict
The clearest difference is iOS requirement: Sentry BLE at 13.1 against Diamond Maps Offline's 15.0. On price, update cadence, ads and in-app purchases 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.
Diamond Maps Offline ships an update every 3 weeks, Sentry BLE every 6 weeks. The most recent releases landed on October 19, 2026 and September 16, 2026 respectively.
| Parameter | Diamond Maps Offline | Sentry BLE |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 3 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.1 — better |
| Further details — not scored | ||
| Size | 80 MB | 66 MB |
| Age rating | 4+ | 4+ |
| Developer | Ben Hill | Vision Metering |
In-app purchases
Diamond Maps Offline
No in-app purchases
Sentry BLE
No in-app purchases
Questions
Is Diamond Maps Offline free?
Is Sentry BLE free?
Do Diamond Maps Offline or Sentry BLE have ads?
Which is updated more often, Diamond Maps Offline or Sentry BLE?
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