App Overview

Pocket Marine icon

Pocket Marine

Liam Salmons · Utilities

A handy tool to keep track of all of the vital information related to your aquarium together with an in-depth library of species to ensure you never get caught short for an impulse buy.

$3.99 · In-app purchases

PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.8
596 ratings · Top 5%

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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A product spec, screen plans, and build steps for your coding agent.

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What's included17 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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> SELECT BUILD PLATFORM:

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

// RORK SYSTEM PROMPT
Rork plan preview for Pocket Marine: map the core Utilities 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

Add more tools for route planning and marine charts.

Assumption to check: Limited features compared to full-fledged navigation systems

Validate with people who use this workflow before building.

Hypothesis 2

Implement better location services and user feedback.

Assumption to check: Occasional GPS inaccuracies

Validate with people who use this workflow before building.

Hypothesis 3

Introduce offline mode for essential features.

Assumption to check: No offline access to data

Validate with people who use this workflow before building.

Hypothesis 4

Offer a freemium model with essential tools for free.

Assumption to check: High price point for basic features

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

A handy tool to keep track of all of the vital information related to your aquarium together with an in-depth library of species to ensure you never get caught short for an impulse buy. Main features - • An encyclopaedia of over 800 species of marine fish, invertebrates and coral • Testing journal to keep track of over 30 of the most vital parameters • Trends to plot graphs and visualise how stable each parameter is over time • Inhabitants diary to keep track of your latest additions including information such as how long you've had it, was it feeding in store beforehand, where was it purchased from and much more. • Dosing log top keep track of any chemical additions to your tanks to help keep up to date on doses and keep stability where it should be • Reminders with device notifications so you never miss an important event • Water change journal to keep a detailed log such as when, how much, salinity etc. of your water changes performed • Maintenance log to remind you of your last maintenance actions completed per tank • Compatibility of species - A simple, brief run down of what species are typically safe, tolerant or not safe to be housed with others • A simple set of useful calculators such as alkalinity conversions, Celsius to Fahrenheit or gallons to litres and more. Keeping track of our aquariums can ultimately be one of the most important parts to the 'reef keeping' hobby. Maintaining husbandry tasks, testing, stability, water changes, inhabitant stats etc. are all vital to keeping successful aquariums. Pocket Marine was designed to make inputting, storing and keeping all information with you at ease. Often, any issues that we have with our aquariums can be linked to actions that were performed a short time beforehand. For this reason, a log of changes made, actions performed or additions can be vital when trying to decipher a problem that may be in play. Pen and paper has always been a great way to keep this information at hand but, Pocket Marine offers a place to store this somewhere that, this day and age, is with us at all times. Not just for tracking events. Pocket Marine is a great way to help you log your inhabitants into specific tanks, record your latest water change for your mixed reef tank or simply log your latest maintenance action performed on the fish only office tank. Recording your information couldnt be easier and keeping it on your mobile device saves on that frantic search incase of needing the information at a later date. Help with that last second impulse buy at the store. With an in depth library of over 800 species of fish, invertebrates and coral and being added to daily, you will always have the information on hand that you need to make that informed decision on a purchase. We hope you enjoy using the app and that we can help with your success in the hobby and welcome any feature requests you may have. Happy Reefing!

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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.

SUGGESTED BUILD STACK
React Native
Expo
React Navigation
Axios
Redux
React Native Vector Icons
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.