Appworthy

Anchor Alarm: ZENKOU PRO

Boat Monitor Onboard & Ashore

Unitio A
Download on theApp Store
App Store rating4.5★177 ratings
PriceFreeIn-app $7.99–$99.99
Age4+Store age rating
Size325 MBiPhone download
CategoryUtilities
DeveloperUnitio A

What we found

Full report

Too little checked to say Store information only. We haven’t analysed this app or read its reviews yet.

Money

  • Free to download · in-app purchases $7.99–$99.99 (10 listed, the most the App Store shows). Monthly plans $7.99 (about $96 a year) and $9.99 (about $120 a year); weekly plans $8.49 (about $441 a year) and $17.49 (about $909 a year); yearly plans $25.49, $27.99 and $29.99.
  • If you subscribe through the store, cancel in iPhone Settings → your name → Subscriptions. Deleting the app doesn’t cancel a subscription.

Not yet tested.

The store currently lists version 2.4.32, updated 2025-06-04.

Preview

Screenshot 1Screenshot 2Screenshot 3Screenshot 4Screenshot 5Screenshot 6Screenshot 7Screenshot 8

Store screenshots supplied by the developer.

About this app

With cutting-edge features that keep you connected both onboard and ashore, ZENkou ensures you stay safe and informed—no matter where you are.

INSTANT LIVE ALERTS & REMOTE MONITORING

Zenkou instantly notifies preconfigured mobile devices when a dragging anchor is detected, empowering timely action.

With LIVE technology, boat owners can remotely track their vessel’s location, monitor progress, and receive anchor drifting alarm from ashore.

FLOTILLA MANAGEMENT

Zenkou LIVE N2N offers the flexibility to receive alerts from multiple boats and share them with unlimited followers.

ALWAYS ON WATCH (24/7)

Enable Zenkou to run in the background, even when your iPhone is locked or you're using other apps.

GUARANTEED THROUGH EXTENSIVE TESTING

Over 10,000 boaters trust Zenkou. They've enjoyed more peaceful sleep and saved their boats by responding to an anchor watch alarm.…

From the developer’s store description.

For developers and the curious

The full report

The evidence, sources, measurements and versions behind every label above.

Findings and evidence

Not yet tested
Not yet tested. No analysis has been published for this app. A missing label is not a clean bill of health.

What reviewers report

No review coverage

No review analysis published for this app.

Measurements

3 measured · 5 not assessed

“Not assessed” means we could not measure it. It is never a zero and never a pass.

From store data and reviews

Developer replies to reviews
Not assessed
Fewer than 50 reviews scanned — too few to state a rate
Price in the store description
The store description doesn’t list prices (most don’t)
Cancelling, in the store description
The store description doesn’t say how to cancel (most don’t)
Themes reported by reviewers
Not assessed
This app's reviews have not been assessed yet
Five-star share of ratings
65–79% five-star
Arithmetic on the stores' own published rating counts. It says nothing about why the ratings fall where they do.

In the app package we scanned

No package has been scanned for this app, so nothing is published about what it ships. That is an absence of evidence, not a finding.

Sensitive permissions
Not assessed
No package has been scanned for this app
Analytics or tracking SDKs in the scanned package
Not assessed
No package has been scanned for this app
Advertising SDKs in the scanned package
Not assessed
No package has been scanned for this app
How we know

Supporting measurements: not a complete list of possible harms or positives. Measurement vocabulary 1.4 · how these are measured

Versions and dates analysed

Not yet tested

Not yet tested. No analysis has been run for this app, so there is no version or date to report.

Store update history

Each store’s release notes, as the developer wrote them. They are the developer’s words, not ours.

App Store

Version 2.4.32 · 2025-06-04
Thanks for using Zenkou! We fixed user-reported issues and added new features to give you even more peace of mind while you're at anchor on your boat. If you're enjoying the app, please consider leaving a review or rating!

Assessment record

Status
Not yet tested
App identifier
anchor-alarm-apple-1568849324
Sources used
None recorded
Reviews read
None recorded
Package examined
No package scan
Human inspection
Not completed
How we know
Measurement vocabulary
1.4

Store facts

App Store

What the stores publish. Store ratings are the stores’ numbers, not Appworthy’s, and are never averaged across stores.

App Store

Store rating
4.50 ★ · 177 ratings
Version
2.4.32
Updated
4 Jun 2025
Price
Free · In-app purchases
Age rating
4+
Size
325 MB
Open in App Store
Developer
Unitio A
Category
Utilities
Listing price
Free · In-app purchases

Purchases the store lists

 What this app sells

From the store listing. Billing terms are read from each purchase’s name — the stores don’t publish them — so treat them as a strong hint, not a disclosure.

Subscriptions7
Remote LIVE Alerts - 1 weekWeekly$8.49
Remote LIVE Alerts- 1 weekWeekly$17.49
Premium Features - 1 monthMonthly$9.99
Marine Barometer - 1 monthMonthly$7.99
Premium Features - 1 yearYearly$29.99
Remote LIVE Alerts - 1 YearYearly$25.49
Marine Barometer - 1 yearYearly$27.99
Buy once3
Premium Features - LifetimeLifetime$99.99
LIVE Features - LifetimeLifetime$99.99
Barometer LifetimeLifetime$49.99
This list is cut off. Apple shows at most 10 in-app purchases, and this app is at the limit — so it very likely sells more than we can see.

Method and limits

What this report can and cannot show

What a missing label means

Not yet tested. No analysis has been published for this app, so there is no method to describe for it yet. A missing label is not a clean bill of health: it means nothing has been read, not that nothing is wrong.

Limits of this report

  • A package scan is static. It identifies code and text in one Android build. It does not measure a live ad session, test a deletion request, or count the steps needed to cancel.
  • Reviews keep their sample. A review-only charge shows distinct reviewers, the share and the sample size, and is published only once it clears that label’s published threshold. Calibration labels are machine-drafted and not yet confirmed by a person.
  • Not assessed is a state. It is never a zero and never a pass.
  • A missing label is not a clean bill of health. It means the evidence did not support one, not that the app is problem-free.
Not yet human-reviewed. A human review gives an app hands-on, recorded measurements. None has been run for this app. Hands-on inspections are not yet open.
Review thresholds Read the methodology For developers

Request a correction

[email protected]

Write to [email protected], or use the form. Name the finding, the app version and the evidence that needs correcting. Factual corrections are free and never depend on buying anything.

Report a factual error — free Email a correction