# Mobius vs Reef Delight Ultra BARs

The clearest difference is update cadence: Mobius at every 2 months against Reef Delight Ultra BARs's every 20 months. Reef Delight Ultra BARs's advantage is iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Mobius ships an update every 2 months, Reef Delight Ultra BARs every 20 months. The most recent releases landed on September 21, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Mobius | Reef Delight Ultra BARs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (328 ratings)](https://appshunter.io/ios/app/mobius/id1453744762/reviews)** | — |
| Number of ratings | **328** | — |
| Positive reviews | 27.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 20 months |
| Monetization | Free | — |
| Size | 95 MB | 71 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [C2 Development, LLC](https://appshunter.io/developer/731463338) | [Reef Delight](https://appshunter.io/developer/1701390348) |

## 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


### Reef Delight Ultra BARs

[App page](https://appshunter.io/ios/app/reef-delight-ultra-bars/id6458732107)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mobius free?

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

### Is Reef Delight Ultra BARs free?

Reef Delight Ultra BARs is free to download, with no in-app purchases.

### Do Mobius or Reef Delight Ultra BARs have ads?

Neither Mobius nor Reef Delight Ultra BARs shows ads.

### Which is updated more often, Mobius or Reef Delight Ultra BARs?

Mobius ships an update every 2 months, and Reef Delight Ultra BARs every 20 months. Most recently, Mobius was updated on September 21, 2026 and Reef Delight Ultra BARs on September 18, 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.*