App Overview

Anchor Alarm - Anchor Watch icon

Anchor Alarm - Anchor Watch

Florian Kriesche · Productivity

I had two simple requirements for an anchor alarm app:

$4.99 · In-app purchases

PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.0
16 ratings · Top 30%

Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.

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What's included18 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

Feature spec

Goal: Send a clear invoice after finishing a job.

  • Add a client, line items, a due date, and payment instructions.
  • Preview the total before exporting a PDF.
  • Keep an editable draft if export fails.

Screen plan

Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.

States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.

Differentiate and validate

Hypothesis: Contractors need faster repeat invoices more than more templates.

First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.

The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.

Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.

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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

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Rork plan preview for Anchor Alarm - Anchor Watch: map the core Productivity workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.

Hypothesis 1

Implement better GPS tracking and notification reliability.

Assumption to check: Users report issues with alarm accuracy and reliability.

Validate with people who use this workflow before building.

Hypothesis 2

Offer a wider range of sound options and user-uploaded sounds.

Assumption to check: Limited customization for alarm sounds.

Validate with people who use this workflow before building.

Hypothesis 3

Simplify the interface with better organization and intuitive design.

Assumption to check: The UI can feel cluttered with too many features.

Validate with people who use this workflow before building.

Hypothesis 4

Optimize location tracking to reduce battery consumption.

Assumption to check: High battery usage when using GPS continuously.

Validate with people who use this workflow before building.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store 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.

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Screenshots

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Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

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BUILD KIT DIFFICULTY
Intermediate

From the Build Kit assessment.

A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.