# Mobius vs REEFB

The clearest difference is rating: REEFB at 3.0 against Mobius's 2.0. REEFB also leads on iOS requirement (13.0 vs 15.6). Mobius's advantage is review sentiment (27% vs 0%) and ratings volume (328 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

REEFB holds the better App Store score, 3.0 against 2.0. That said, the two scores are not equally well evidenced: Mobius has 328 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 27% of Mobius's written reviews are positive against 0% of REEFB's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 9, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Mobius | REEFB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (328 ratings)](https://appshunter.io/ios/app/mobius/id1453744762/reviews) | **[3.0 (1 ratings)](https://appshunter.io/ios/app/reefb/id6738972525/reviews)** |
| Number of ratings | **328** | 1 |
| Positive reviews | **27.5% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 95 MB | 39 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [C2 Development, LLC](https://appshunter.io/developer/731463338) | [CROWN P & E CO., LTD.](https://appshunter.io/developer/1783223891) |

## What reviewers say

### 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


### REEFB

[App page](https://appshunter.io/ios/app/reefb/id6738972525)

This app offers intelligent control for REEF B Series devices, simplifying aquarium management. It allows for effortless monitoring and maintenance of aquaculture equipment and schedules via Bluetooth connectivity.

**Highlights:** Dosing modes: 24-hour average, custom, single-dose, Precise dosing calibration, Flexible schedule adjustment, Multi-device management via Bluetooth, Accurate spectrum scheduling for LED lights, Master-sub synchronization for lights, Scene modes for LED lights

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Mobius free?

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

### Is REEFB free?

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

### Which has better reviews, Mobius or REEFB?

REEFB is rated higher. Mobius averages 2.0 out of 5 from 328 ratings, while REEFB averages 3.0 from 1 ratings.

### Do Mobius or REEFB have ads?

Neither Mobius nor REEFB shows ads.

### Which is updated more often, Mobius or REEFB?

Mobius ships an update every 2 months, and REEFB every 2 months. Most recently, Mobius was updated on October 9, 2026 and REEFB on October 11, 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.*