DragAlarm (Anchor guard) vs Anchor Basic
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DragAlarm (Anchor guard)
This app monitors your boat's anchor to alert you if it's dragging. It calculates your swinging radius and displays your location, anchor position, and boat tracking on a map. Receive email alerts with detailed information if your anchor becomes unsecured.
- Anchor dragging alerts
- GPS tracking
- Swinging radius calculation
- Offline map support
- Email notifications
- Apple Watch integration
Read full descriptionHide full description
Keep calm. With DragAlarm you can relax in your boat, on the beach, at the bar or wherever you want. This app stands watch and notifies you if the anchor is improperly secured and your boat is dragging. Activate DragAlarm when you're letting go the chain or once you’re anchored. Just following a few steps the app calculates the swinging radius or otherwise you can enter it manually. Once it has been configured, you will see the map with the location of the anchor on the screen, the swinging circle and the ship with her tracking. Remember that you should let go the chain at least 3 times the depth to ensure a good anchorage. - No internet connection required. (Except for the alert via email). - It is recommended to use the app with the iPhone / iPad plugged in. - Setting the map type: map, hybrid or satellite. - Setting the GPS accuracy to save battery power. - Changing measurement units: meters, feet or fathoms. - Alert via email with information regarding dragging distance, position, time, GPS error and battery level. - Ability to respond to the alert on your Apple Watch. WARNING A continued use of the GPS in the background can dramatically decrease the battery life. DragAlarm makes use of the GPS antenna. Take into account that not all iOS devices have this inbuilt antenna and therefore this app may not work properly. All iPhones do have the antenna. Only the 3G Cellular iPad with data connection has GPS antenna. Drag Alarm is an app developed by Marinus. Marinus, improving the maritime sector. Marinus Apps www.marinusapps.com
Anchor Basic
This app provides a reliable anchor alarm for boats, offering drift warnings and low battery alerts. Users can pause the alarm and resume monitoring later, or set the anchor by current location, bearing, and distance. It also allows remote monitoring of other users' Anchor Plus alarms.
- Drift warning alerts
- Low battery alarms
- Pause and resume alarm function
- Set anchor by location, bearing, or distance
- Remote monitoring of Anchor Plus alarms
Read full descriptionHide full description
A fully functional anchor alarm designed for iPhone & iPad. - Simple and reliable with user selectable units, drift warning and low battery alarms. - Pause the alarm and take your device with you; simply continue drift monitoring when you return. - Set the anchor at the current location or a bearing & distance to the anchor. - Use Anchor Basic to remotely monitor Anchor Plus. Go ashore for dinner and monitor your friends Anchor Plus alarm using Anchor Basic. - If you like this version, try Anchor Plus with a host of additional features
Screenshots
Verdict
The clearest difference is rating: Anchor Basic at 3.5 against DragAlarm (Anchor guard)'s 1.0. Anchor Basic also leads on price ($0.99 vs $9.99) and review sentiment (67% vs 49%). DragAlarm (Anchor guard)'s advantage is iOS requirement (9.0 vs 15.6). On update cadence, ads, 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
DragAlarm (Anchor guard) costs $9.99 and Anchor Basic $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Anchor Basic holds the better App Store score, 3.5 against 1.0. That said, the two scores are not equally well evidenced: Anchor Basic has 17 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 49% of DragAlarm (Anchor guard)'s written reviews are positive against 67% of Anchor Basic's.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.
| Parameter | DragAlarm (Anchor guard) | Anchor Basic |
|---|---|---|
| Price | $9.99 | $0.99 — better |
| Rating | 1.0 (1 ratings) | 3.5 (17 ratings) — better |
| Positive reviews | 48.6% of reviews | 66.7% of reviews — better |
| Number of ratings | 1 | 17 — better |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 10 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Alejandro | Roy Cadman |
Customer experience
DragAlarm (Anchor guard)
Anchor Basic
In-app purchases
DragAlarm (Anchor guard)
No in-app purchases
Anchor Basic
No in-app purchases
Questions
Is DragAlarm (Anchor guard) free?
Is Anchor Basic free?
Which has better reviews, DragAlarm (Anchor guard) or Anchor Basic?
Do DragAlarm (Anchor guard) or Anchor Basic have ads?
Which is updated more often, DragAlarm (Anchor guard) or Anchor Basic?
Other comparisons
