# Pocket Marine vs Mobius

The clearest difference is review sentiment: Pocket Marine at 79% against Mobius's 27%. Pocket Marine also leads on rating (4.8 vs 2.0) and update cadence (fortnightly vs every 2 months). Mobius's advantage is price (Free vs $3.99). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

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

Pocket Marine holds the better App Store score, 4.8 against 2.0. Both are backed by a comparable volume of ratings — 597 and 330 respectively. Written reviews point the same way: 79% of Pocket Marine's written reviews are positive against 27% of Mobius's.

Pocket Marine ships an update fortnightly, Mobius every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Pocket Marine | Mobius |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.8 (597 ratings)](https://appshunter.io/ios/app/pocket-marine/id999538938/reviews)** | [2.0 (330 ratings)](https://appshunter.io/ios/app/mobius/id1453744762/reviews) |
| Number of ratings | **597** | 330 |
| Positive reviews | **78.8% of reviews** | 27.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free | Free |
| Size | 213 MB | 95 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Liam Salmons](https://appshunter.io/developer/999538937) | [C2 Development, LLC](https://appshunter.io/developer/731463338) |

## What reviewers say

### Pocket Marine

[App page](https://appshunter.io/ios/app/pocket-marine/id999538938)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

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

**What reviewers complain about**

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

**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

**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


### Mobius

[App page](https://appshunter.io/ios/app/mobius/id1453744762)

This app provides intelligent control for aquarium equipment, simplifying management of multiple tanks. Create custom scenes, schedules, and access quick status updates to maintain your aquatic environment with ease.

**Highlights:** Manage multiple tanks, Create custom scenes, Drag-and-drop scheduling, Lighting control with templates, Flow control for pumps, Dosing automation and tracking

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 🚀 Intuitive interface
- 👍 Controllability of devices
- 👍 Potential for future improvements

**What reviewers complain about**

- 🐛 Connectivity issues
- 🐛 Time/date sync problems
- 🐛 Unreliable performance
- 🐛 Buggy and glitchy
- 🐛 Difficult to navigate

**Reported bugs**

- Constant disconnections
- Inability to add/connect devices
- Lighting schedule not working as expected
- Time/date resets randomly
- Crashes and freezes

**Requested features**

- Remote access and control
- Improved lighting schedule customization
- Pump/device off option
- Sync settings across devices
- Better documentation and tutorials


## Frequently asked questions

### Is Pocket Marine free?

Pocket Marine costs $3.99, with no in-app purchases.

### Is Mobius free?

Mobius is free to download, with no in-app purchases.

### Which has better reviews, Pocket Marine or Mobius?

Pocket Marine is rated higher. Pocket Marine averages 4.8 out of 5 from 597 ratings, while Mobius averages 2.0 from 330 ratings.

### Do Pocket Marine or Mobius have ads?

Neither Pocket Marine nor Mobius shows ads.

### Which is updated more often, Pocket Marine or Mobius?

Pocket Marine ships an update fortnightly, and Mobius every 2 months. Most recently, Pocket Marine was updated on October 24, 2026 and Mobius on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*