Comparison

Anchor Alarm vs Shopper Logger

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Anchor Alarm

This app provides an advanced anchor alarm system for boaters. It allows for custom swing circle shapes and loud, noticeable alarms to ensure you are alerted if your anchor drags. Features include real-time tracking and remote monitoring capabilities.

Highlights
  • Customizable swing circle shapes
  • Loud, unmissable alarm tones
  • Ship dimensions shown to scale
  • Anchor track drawing on map
  • Optional anchor marking
  • GPS signal filtering
  • Background and locked screen operation
  • Remote monitoring of other devices
Read full description

I had two simple requirements for an anchor alarm app: 1. The swing circle should not be just a circle, but should take into account my individual free space, which can be different in each direction. 2. I want to be really woken up by an alarm when the anchor is dragging. (I would never wake up from the quiet, one-time alarm tone of my Garmin GPS handheld device) And that's exactly what I already implemented in the first successful version of this app. More and more features were added over time. Now I have completely overhauled everything in Version 2, and I am convinced that your anchor watch will run differently with this anchor alarm app in the future. You will surely know the problem when you want to set an anchor alarm after anchoring, you don't want the same warning distance in every direction. Because the wind, for example, is coming from the west, but it will turn to the east at night, and maybe there is a shallow water area that you want to be warned about early on. For example, you have enough space to the south or north. I have addressed and solved this problem with this app. Here's an overview of all the important features: - Individual shapes as swing circles instead of just round circles - An alarm tone that you won't miss (after the first opening of the app, a less obtrusive tone is configured so that you don't get too startled during your first tests) - Your ship's dimensions are shown to scale on the map - The track during swinging is drawn on the map, so you can see at a glance when the situation changes - You can also optionally mark the anchor on the map - False alarms caused by individual bad GPS signals can be filtered out - A loud alarm tone also comes on when the device volume is low or off - There is an alternative monitoring option with which an alarm is triggered if your ship (or your iPhone) turns a predetermined number of degrees. This way, you can monitor whether one of two anchors (stern and bow anchor) is no longer holding and the ship is turning. - All alarms also run in the background and when the iPhone is locked. - In addition, you can use one of the two devices to remotely monitor the other. So you can go to the restaurant with the dinghy and still see the view from the device on the boat live. An alarm is also triggered on both devices. When you're on the water with your boat, you need to make sure the anchor is properly secured and doesn't slip. Therefore, the anchor watch is an important instrument to monitor the position of the anchor and ensure that the boat stays in place. The anchor alarm app is a useful tool that helps you protect yourself from unexpected anchor movements. My app for anchor watch monitors the position of the ship and sends out a noticeable acoustic signal when your boat changes its position to an unauthorized area. This dragging of the anchor can happen in different ways, for example, due to wind or currents. When the alarm is triggered, you can act quickly and reposition the anchor to ensure that the boat stays in place. The anchor alarm is an acoustic signal that is triggered when the boat moves outside the preset area. This can help you quickly react to unexpected anchor movements and avoid damage to the yacht. The anchor alarm is particularly useful when you anchor in an unfamiliar environment or when the weather changes. In summary, the anchor watch and my anchor alarm app are important instruments to ensure the safety of your yacht. With this app, you can ensure that your anchor is properly secured and that the ship doesn't move from its position. If you're on the water and like to anchor, you should definitely use my anchor alarm app to protect yourself from unexpected movements and make your night comfortable and safe.

About

Shopper Logger

This app helps independent contractors log important order details with photos, timestamps, and notes. Easily retrieve logs by date and time to dispute claims or for personal records. It offers a paper-like logging experience without recurring fees or ads.

Highlights
  • Photo logging with timestamps
  • Add notes to logs
  • Search logs by date and time
  • Dispute claim support
  • Designed for gig workers
Features
Read full description

Utilize the convenience of this simple app to store valuable photos with time stamps and notes for independent contractors, such as InstaCart Shoppers, Shipt shoppers, UberEats drivers, Doordash, Postmates and many more. Capture and store photos of receipts, produce, drop-off locations, mileage and other important items. Then conveniently locate logs by date and time to dispute Shopper claims, for personal use and much more. Conveniently crafted with the help of an InstaCart shopper, this logger is as close as you can get to logging on paper without the hassle of monthly fees, advertisements and other distracting features of comparable apps.

Screenshots

Anchor Alarm4 screens
Shopper Logger3 screens

Verdict

The call

The clearest difference is price: Shopper Logger at Free against Anchor Alarm's $4.99. Shopper Logger also leads on rating (5.0 vs 4.2) and update cadence (daily vs every 2 months). Anchor Alarm's advantage is ratings volume (19 vs 3). On ads, 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

CostPrice · In-app purchases · Ads · Monetization

Shopper Logger is free to download; Anchor Alarm costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Shopper Logger holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Anchor Alarm has 19 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 87% of Anchor Alarm's written reviews are positive against 100% of Shopper Logger's.

UpkeepUpdate frequency

Anchor Alarm ships an update every 2 months, Shopper Logger daily. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
Anchor Alarm versus Shopper Logger: the parameters behind the verdict, then further details
ParameterAnchor AlarmShopper Logger
Price$4.99Free — better
Rating4.2 (19 ratings)5.0 (3 ratings) — better
Positive reviews87.1% of reviews100.0% of reviews — better
Number of ratings19 — better3
Update frequencyEvery 2 monthsDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.614.1 — better
Further details — not scored
Size6 MB8 MB
Age rating4+4+
DeveloperFlorian KriescheJuan Reyes Dias-Aidos

Customer experience

Anchor Alarm

All ratings16 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews31 reviews
Positive87.1%
Neutral0.0%
Negative12.9%

Shopper Logger

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Anchor Alarm

No in-app purchases

None

Shopper Logger

No in-app purchases

Questions

Is Anchor Alarm free?
Anchor Alarm costs $4.99, with no in-app purchases.
Is Shopper Logger free?
Shopper Logger is free to download, with no in-app purchases.
Which has better reviews, Anchor Alarm or Shopper Logger?
Shopper Logger is rated higher. Anchor Alarm averages 4.2 out of 5 from 19 ratings, while Shopper Logger averages 5.0 from 3 ratings.
Do Anchor Alarm or Shopper Logger have ads?
Neither Anchor Alarm nor Shopper Logger shows ads.
Which is updated more often, Anchor Alarm or Shopper Logger?
Anchor Alarm ships an update every 2 months, and Shopper Logger daily. Most recently, Anchor Alarm was updated on November 6, 2026 and Shopper Logger on November 3, 2026.

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