# Pocket Marine — The Reef Keepers Handbook

> Comprehensive aquarium management and marine species reference tool. (iPhone/iPad app by Liam Salmons.)

- Source: https://appshunter.io/ios/app/pocket-marine/id999538938 (this page in markdown: same URL + `.md`)
- Developer: [Liam Salmons](https://appshunter.io/developer/999538937)
- Category: Utilities, Productivity
- Price: $3.99
- Rating: 4.80/5 from 596 App Store ratings · 99 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 213 MB
- Languages: American English
- Released: 2015-06-08
- Data updated: 2026-08-27
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/pocket-marine/id999538938/reviews.md

## What is Pocket Marine?

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!

## Key features

- Marine species encyclopedia (800+)
- Water parameter testing journal
- Inhabitant and dosing logs
- Maintenance and water change journals
- Species compatibility guide
- Useful calculators
- Customizable reminders

## What do users think of Pocket Marine?

Overall sentiment: neutral

**Pros**

- 👍 Helpful for tracking parameters
- 🚀 Fantastic data base
- 👍 Well designed app
- 👍 Comprehensive features
- 👍 Useful for new marine aquarium keepers

**Cons**

- 🐛 Crashes when trying to set up aquarium
- 🐛 Deletes test results
- 🐛 Buggy and unstable
- 🐛 Spelling mistakes
- 🐛 Unable to change default parameters

**Commonly reported bugs**

- Crashes when trying to edit targets/ranges
- Endless scroll to select values
- Inconsistent behavior when switching between Celsius and Fahrenheit
- Crashes when accessing certain sections like soft corals

**Most requested features**

- Ability to sync data across devices
- Customizable home screen
- Tracking for spending on tank supplies
- Ability to set default parameters
- Graphs showing multiple parameters together
- Export data to Excel
- Ability to move livestock up/down in list
- Add more fish and coral species to database
- Dosing calculator

## Recent user reviews (10 of 99)

All indexed reviews: https://appshunter.io/ios/app/pocket-marine/id999538938/reviews.md

### 3/5 — Measurements

*2025-03-02, version 6.0*

Is there a way to switch from liters to gallons?

### 2/5 — Does not live up to hype

*2024-12-31, version 6.0*

I was expecting so much more, compatibility of specific species of fish and inverts, recommended tank sizes, dosing recommendations. This is simply a tracking tool with limited encyclopedia of livestock. A paid app should offer more than, “Not much is known…”

### 1/5 — Waste of money

*2024-12-19, version 6.0*

Doesn’t save any of my testing days. I am currently cycling and can’t compare my days. 😡

### 2/5 — Pointless

*2024-11-08*

I purchase this app thinking it would be a nicer UI vs AquaticLog which I’ve been using since I set my tank up. So I had my iPad out trying to enter the info from AquaticLog to Pocket Marine. Phone died so I went to use my iPad thinking it would just sync like AquaticLog and well let’s be honest almost ALL Apple apps thus the reason it has such an amazing following. So needless to say when I went into the app on my iPad there was nothing there. None of the info I had spent the last hour or so entering was in the Pocket Marine iPad app. So what exactly is the point of having it on both?

### 4/5 — Great app, but iCloud synchronization is a must

*2024-11-01*

The app is really beautiful and well-designed! The photos are stunning, and the species view is nice and well-organized, even though it currently covers only a few species. One feature I would love to see is iCloud synchronization, which would make it easier to manage data across devices. A French version would also be appreciated for French-speaking users. Overall, it's a fantastic app with great potential for even more content in the future!

### 5/5 — Fantastic app

*2024-10-29*

Great app, best that I’ve found. Easy to use and fantastic data base. Would benefit from more specific reef tank species being added, and more specific data, but still worth the money.

### 5/5 — Not bad

*2024-10-05*

It doesn’t appear as though you can change to imperial units? I can’t find a way to contact a developer. This would be a massive help to us goofs in the US lol.

Edit: I’m an idiot. Thanks for the help!!

**Developer response:** Hi Taz1458 - there is a switch along the top of the page inside every species list that lets you swap between imperial and metric. Whichever way you have the switch selected on will store indefinitely across the entire app so you don’t have to swap back and forth. 

We are more than happy to go over this if you still cannot find this. Please contact us on info@pocketmarine.co.uk if necessary. 

Much appreciated.

### 4/5 — App limitations

*2024-09-21*

So far so good, nicely designed , feels a good quality interface. The one issue I’ve found is although you can spec a very large tank in terms of dimensions, you can’t in volume, it maxes out at 500lt even though the dimensions allow for much larger volume. Would be a nice addition if the app used your dimensions to calculate  your volume (in liters or gallons) with the option to override , as sumps are never full to the very brim. 

Keep up the good work.

### 3/5 — Decent

*2024-08-05*

I genuinely like this app and the information that is provided within. However, there are an absurd amount of spelling mistakes. To me, that is just a little unprofessional and tacky, and sometimes I question the validity of the information given, due to the spelling mistakes. But overall, is a good app, I’ll continue to use it.

**Developer response:** Hi Avcaras - Appreciate it you taking the time to leave a review.

I can completed understand the frustration with the spelling mistakes. This day and age there aren’t any excuses for it. I am actively correcting this every single day and hope that very, very soon this will all be cleared up. As a sole developer of the app, it’s just a simple oversight on my behalf when inputting the data without thoroughly checking on top. All information provided has been taken from multiple trusted sources and re-written for an easier, quick glance take on the details and spelling mistakes have unfortunately gone in noticed from my side. 

Hopefully you stick with us and within the next few days/week see a complete spelling overhaul! 

Much appreciated.

### 3/5 — Water Parameters seem off

*2024-07-14, version 6.0*

The app looks good, but see some issues and not quite sure how to address.

1. If you enter a temp reading of 78.2°F, the indicator is Red, you you enter 25.6°C, the indicator is Green.  Using any value of F does not change the indicator to Green.  Using the the converted value of C to F does not work.

2. What values are used to indicate Red vs Green?  This is not published anywhere on the app.

3. If ammonia levels of .25ppm is considered safe, why is my level of .04 showing up with a Red indicator?

## Frequently asked questions about Pocket Marine

### What does Pocket Marine do?

Pocket Marine is a comprehensive tool designed for marine aquarium hobbyists. It allows you to meticulously log and track all vital information related to your aquarium, including water parameters, inhabitants, dosing, and maintenance. It also features an extensive library of marine species to help you make informed decisions about new additions.

### What are the key features of Pocket Marine?

Key features include an encyclopedia of over 800 marine species, a testing journal for over 30 vital parameters, an inhabitants diary, a dosing log, water change logs, maintenance logs, species compatibility information, and useful calculators. It also provides customizable reminders for important events.

### Is Pocket Marine free to use?

Yes, based on the provided information, Pocket Marine is a free application. There are no mentions of in-app purchases or subscription models, and it is also stated to be ad-free.

### What kind of information can I log about my aquarium inhabitants?

The inhabitants diary allows you to record details about your aquarium additions. This includes information such as how long you've had the inhabitant, whether it was feeding in-store, where it was purchased from, and other relevant data to help you manage your aquarium's ecosystem.

### How does Pocket Marine help with impulse buys?

The app features an in-depth library of over 800 species of marine fish, invertebrates, and coral, which is continuously updated. This allows you to quickly access information on species compatibility and other vital details while at the store, helping you make informed decisions and avoid impulse purchases that may not be suitable for your tank.

## Version history (last 5 releases)

### 6.0 — 2024-04-25

- Bug fixes
- UI updates


Thanks for sticking with us and Happy reefing!

### 5.4.2 — 2022-09-17

- Minor UI amendments


Thanks for sticking with us and Happy reefing!

### 5.4.1 — 2022-08-13

- Minor UI amendments


Thanks for sticking with us and Happy reefing!

### 5.4 — 2022-08-10

- Fixed an issue preventing some parameter highs and lows from storing their selected values
- Slight changes to the UI for better navigation and viewing
- Improved selection when choosing certain values in the data log screens

Thanks for sticking with us and Happy reefing!

### 5.3.2 — 2022-06-08

- Fixed an issue that prevented exporting test results on certain iPad devices
- Slight change to the information view of the species detail pages
- A few minor bug fixes in the background

Thanks for sticking with us and Happy reefing!

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*