# Diamond Maps Offline vs Sentry BLE

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.

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.

## The numbers

| Metric | Diamond Maps Offline | Sentry BLE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/diamond-maps-offline/id6443440300/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | Free | — |
| Size | 80 MB | 66 MB |
| Requires iOS | 15.0 | **13.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ben Hill](https://appshunter.io/developer/1645876200) | [Vision Metering](https://appshunter.io/developer/1567248925) |

## What reviewers say

### Diamond Maps Offline

[App page](https://appshunter.io/ios/app/diamond-maps-offline/id6443440300)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Sentry BLE

[App page](https://appshunter.io/ios/app/sentry-ble/id6752409845)

**In-app purchases:** none


## Frequently asked questions

### Is Diamond Maps Offline free?

Diamond Maps Offline is free to download, with no in-app purchases.

### Is Sentry BLE free?

Sentry BLE is free to download, with no in-app purchases.

### Do Diamond Maps Offline or Sentry BLE have ads?

Neither Diamond Maps Offline nor Sentry BLE shows ads.

### Which is updated more often, Diamond Maps Offline or Sentry BLE?

Diamond Maps Offline ships an update every 3 weeks, and Sentry BLE every 6 weeks. Most recently, Diamond Maps Offline was updated on October 19, 2026 and Sentry BLE on September 16, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*