Comparison

Pocket Marine vs Hydor App

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

Head to head
About

Pocket Marine

Manage all your aquarium data in one place. Track water parameters, inhabitants, dosing, and maintenance with detailed logs and reminders. Access an extensive library of marine species to make informed decisions about new additions.

Highlights
  • Marine species encyclopedia (800+)
  • Water parameter testing journal
  • Inhabitant and dosing logs
  • Maintenance and water change journals
  • Species compatibility guide
  • Useful calculators
  • Customizable reminders
Features
Read full 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!

About

Hydor App

Remotely manage and configure your aquarium devices from anywhere. Set daily programs, create personalized device sets, and receive status notifications to keep your aquarium running smoothly.

Highlights
  • Remote Wi-Fi device management
  • Configure daily programs
  • Create personalized device sets
  • Real-time status notifications
  • Manage multiple devices
Features
Read full description

Control your aquarium devices at home or wherever you are thanks to Hydor. With the Hydor app You will be able to: - Manage each Hydor device via Wi-fi directly and in remote - Configure and manage your daily program - Create personalized sets linked to your account - Notification system can update you on Hydor device status wherever you are. Enter into the Hydor world!

Screenshots

Pocket Marine4 screens
Hydor App4 screens

Verdict

The call

The clearest difference is review sentiment: Pocket Marine at 79% against Hydor App's 10%. Pocket Marine also leads on rating (4.8 vs 1.4) and update cadence (fortnightly vs every 3 months). Hydor App's advantage is price (Free vs $3.99) and iOS requirement (11.0 vs 14.0). On ads, in-app purchases, monetization model and device support 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

Hydor App is free to download; Pocket Marine costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Pocket Marine holds the better App Store score, 4.8 against 1.4. That said, the two scores are not equally well evidenced: Pocket Marine has 597 ratings behind it against 52, so its average is the more settled of the two. Written reviews point the same way: 79% of Pocket Marine's written reviews are positive against 10% of Hydor App's.

UpkeepUpdate frequency

Pocket Marine ships an update fortnightly, Hydor App every 3 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
Pocket Marine versus Hydor App: the parameters behind the verdict, then further details
ParameterPocket MarineHydor App
Price$3.99Free — better
Rating4.8 (597 ratings) — better1.4 (52 ratings)
Positive reviews78.8% of reviews — better10.0% of reviews
Number of ratings597 — better52
Update frequencyFortnightly — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.011.0 — better
Further details — not scored
Size213 MB45 MB
Age rating4+4+
DeveloperLiam SalmonsFerplast S.p.a.

Customer experience

Pocket Marine

All ratings596 ratings
Positive94.6%
Neutral3.0%
Negative2.3%
Written reviews99 reviews
Positive78.8%
Neutral9.1%
Negative12.1%

Hydor App

All ratings51 ratings
Positive9.8%
Neutral0.0%
Negative90.2%
Written reviews50 reviews
Positive10.0%
Neutral2.0%
Negative88.0%

Bugs and requests

Pocket Marine

Reported bugs

4 issues
  • 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

Requested features

9 requests
  • 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
Show 4 more
  • Export data to Excel
  • Ability to move livestock up/down in list
  • Add more fish and coral species to database
  • Dosing calculator

Hydor App

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Pocket Marine

No in-app purchases

None

Hydor App

No in-app purchases

Questions

Is Pocket Marine free?
Pocket Marine costs $3.99, with no in-app purchases.
Is Hydor App free?
Hydor App is free to download, with no in-app purchases.
Which has better reviews, Pocket Marine or Hydor App?
Pocket Marine is rated higher. Pocket Marine averages 4.8 out of 5 from 597 ratings, while Hydor App averages 1.4 from 52 ratings.
Do Pocket Marine or Hydor App have ads?
Neither Pocket Marine nor Hydor App shows ads.
Which is updated more often, Pocket Marine or Hydor App?
Pocket Marine ships an update fortnightly, and Hydor App every 3 months. Most recently, Pocket Marine was updated on November 6, 2026 and Hydor App on November 3, 2026.

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