Anchor Alarm vs ShoreMeter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Anchor Alarm
This app monitors your boat's position when anchored, alerting you if it drifts outside a set radius. It provides real-time distance, speed, and direction from your anchor point, with voice notifications and background tracking. View your drift history on standard or satellite maps.
- One-tap anchor set
- Real-time drift tracking
- Customizable alert radius
- Background location tracking
- Voice notifications
- Drift history visualization
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Dropped anchor for the night? VirtualAnchor watches your position and warns you the moment your boat drags outside the radius you set — so you find out from an alert, not from waking up somewhere else. Set your anchor point with one tap. VirtualAnchor tracks your live distance, drift speed and direction from that point, on a map that updates in real time. BUILT FOR STAYING AT ANCHOR - One-tap anchor set from wherever you are right now - Live distance, drift speed and direction, always visible - Alert radius you choose, in meters, kilometers or nautical miles - Background location tracking keeps watching even while the app is closed or your phone is asleep - Voice notifications call out your distance at the interval you pick — useful when you are not looking at the screen - Auto Anchor can detect when your boat has actually stopped and set the anchor point for you SEE WHAT HAPPENED, NOT JUST WHAT IS HAPPENING - Standard or satellite map, switch anytime - Past anchor points stay marked on the map so you can see where you have anchored before - Drift track drawn as you go, so a dragging anchor is visible at a glance HONEST AND OFFLINE-FIRST - No account, no ads, no subscription - One-time purchase, use it every trip - iPhone and iPad VirtualAnchor is a watch aid, not a substitute for standing anchor watch, proper scope, or your vessel's anchor alarm equipment. Always follow safe seamanship practice. Whether you are anchoring for a lunch stop or settling in for the night, VirtualAnchor tells you the moment things start to drift. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
ShoreMeter
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ShoreMeter helps boaters quickly see how far they are from the nearest shore. The app shows your current distance from the coastline, your speed in knots, GPS accuracy and a clear status for slow navigation or planing based on your selected local rules. Use ShoreMeter as a simple visual aid when boating near coasts, islands, bays, marinas or shore-restricted areas. Key features: • Measure distance from the nearest coastline • Show current boat speed in knots • Display GPS accuracy • Clear planing status: slow navigation, allowed or prohibited • Visual and sound alerts when status changes • Country-based rule presets • Custom distance and speed limits • Offline coastline data packages • Simple shore map with distance line • Support for Slovenia and Croatia coastline packages • Optional ShoreMeter Pro upgrade to remove ads and unlock unlimited map access ShoreMeter is designed for boaters who want a quick, easy-to-read distance-from-shore reference without using a full navigation app. The app can help you understand whether you are far enough from shore for planing based on your selected settings. You can use automatic country presets or adjust the distance and speed limits manually. Supported initial coastline packages include: • Slovenia — Slovenian Coast • Croatia — Northern Adriatic: Istria, Kvarner, Krk, Cres, Lošinj • Croatia — Central Adriatic: Zadar, Šibenik, Split, Brač, Hvar • Croatia — Southern Adriatic: Makarska, Pelješac, Korčula, Dubrovnik ShoreMeter works with GPS and open coastline data. After downloading coastline packages, distance calculation can work without an internet connection. Important disclaimer: ShoreMeter is an informational aid only. It is not an official navigation app, legal instrument or replacement for nautical charts, official regulations, buoys, local notices, navigation instruments or safe boating judgment. Rules may vary by country, region, vessel type and local restrictions. Always check and follow the official rules that apply to your location.
Screenshots
Verdict
The clearest difference is price: ShoreMeter at Free against Anchor Alarm's $2.19. Anchor Alarm's advantage is ads (none vs shown). On update cadence, in-app purchases, device support and iOS requirement 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
ShoreMeter is free to download; Anchor Alarm costs $2.19 up front. Anchor Alarm sells 2 in-app purchases, starting at $1.99 per month and ShoreMeter sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Anchor Alarm ships an update weekly, ShoreMeter every 5 days. The most recent releases landed on November 5, 2026 and October 28, 2026 respectively.
| Parameter | Anchor Alarm | ShoreMeter |
|---|---|---|
| Price | $2.19 | Free — better |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Weekly | Every 5 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 16.4 — better |
| Further details — not scored | ||
| Size | 16 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | Netflowers Inc. | Sinus IKS d.o.o. |
In-app purchases
Anchor Alarm
- VirtualAnchor$1.991 Month
- VirtualAnchor$19.991 Year
ShoreMeter
- ShoreMeter Pro$3.99









