# Anchor Sentry vs Ankerwache Pro

The clearest difference is price: Ankerwache Pro at Free against Anchor Sentry's $3.99. Ankerwache Pro also leads on review sentiment (100% vs 73%) and update cadence (every 6 days vs every 3 weeks). Anchor Sentry's advantage is in-app purchases (none vs 2) and iOS requirement (15 vs 17.6). On ads and device support there is nothing between them.

Ankerwache Pro is free to download; Anchor Sentry costs $3.99 up front. Ankerwache Pro sells 2 in-app purchases, starting at $8.99 per year. Anchor Sentry asks for nothing beyond the download.

Anchor Sentry ships an update every 3 weeks, Ankerwache Pro every 6 days. The most recent releases landed on October 26, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Anchor Sentry | Ankerwache Pro |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/anchor-sentry/id1422478182/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 73.3% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 6 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 91 MB | 29 MB |
| Requires iOS | **15** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Michael Dieter Konz](https://appshunter.io/developer/1422478181) | [Frank Urbanowitz](https://appshunter.io/developer/1778548662) |

## What reviewers say

### Anchor Sentry

[App page](https://appshunter.io/ios/app/anchor-sentry/id1422478182)

This app monitors your ship's position while anchored, alerting you if the anchor drags and the vessel moves outside a set perimeter. It offers advanced features like distance circles, prohibited zone alerts, and background operation for continuous monitoring.

**Highlights:** Anchor drag and perimeter breach alerts, Map display with Google Maps or Navionics, Prohibited zone setup with alerts, Background operation, Multi-device sync functionality, GPX track saving, Favorite anchoring place saving

**In-app purchases:** none


### Ankerwache Pro

[App page](https://appshunter.io/ios/app/ankerwache-pro/id6737927360)

This app provides a reliable anchor alarm and management system for recreational boaters. It monitors your position to alert you of drift, allowing for safe nights at anchor. You can also save, share, and discover anchorages with other users.

**Highlights:** Reliable anchor alarm with drift detection, Save and manage anchorages with details, Rate, share, and discover anchorages, Mirror mode for multi-device monitoring, Apple Watch app for wrist alerts, Live status on Lock Screen and Dynamic Island

**Features:** macOS Compatibility, Family Sharing, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly | $8.99 | per year |
| Buy | $17.99 | one-time |


## Frequently asked questions

### Is Anchor Sentry free?

Anchor Sentry costs $3.99, with no in-app purchases.

### Is Ankerwache Pro free?

Ankerwache Pro is free to download, with in-app purchases available.

### Do Anchor Sentry or Ankerwache Pro have ads?

Neither Anchor Sentry nor Ankerwache Pro shows ads.

### Which is updated more often, Anchor Sentry or Ankerwache Pro?

Anchor Sentry ships an update every 3 weeks, and Ankerwache Pro every 6 days. Most recently, Anchor Sentry was updated on October 26, 2026 and Ankerwache Pro on October 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.*