# Mobius vs Reefly

The clearest difference is in-app purchases: Mobius at none against Reefly's 2. Mobius also leads on iOS requirement (15.6 vs 18.6). Reefly's advantage is update cadence (daily vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Reefly sells 2 in-app purchases, starting at $3.99 per month. Mobius asks for nothing beyond the download.

Mobius ships an update every 2 months, Reefly daily. The most recent releases landed on September 26, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Mobius | Reefly |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Free | — |
| Size | 95 MB | 3 MB |
| Requires iOS | **15.6** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [C2 Development, LLC](https://appshunter.io/developer/731463338) | [Justinas Kristopaitis](https://appshunter.io/developer/1812310636) |

## 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


### Reefly

[App page](https://appshunter.io/ios/app/reefly/id6766267836)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReefLog Pro | $3.99 | per month |
| ReefLog Pro | $17.99 | per year |


## Frequently asked questions

### Is Mobius free?

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

### Is Reefly free?

Reefly is free to download, with in-app purchases available.

### Do Mobius or Reefly have ads?

Neither Mobius nor Reefly shows ads.

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

Mobius ships an update every 2 months, and Reefly daily. Most recently, Mobius was updated on September 26, 2026 and Reefly on September 25, 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.*