# Mobius vs Stack

The clearest difference is in-app purchases: Mobius at none against Stack's 2. Mobius also leads on device support (3 vs 1) and iOS requirement (15.6 vs 18). Stack's advantage is update cadence (every 10 days vs every 2 months). On price and ads there is nothing between them.

Both are free to download. Stack sells 2 in-app purchases, starting at $7.99 per 7 days. Mobius asks for nothing beyond the download.

Mobius ships an update every 2 months, Stack every 10 days. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Mobius | Stack |
| --- | --- | --- |
| 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 | **Every 10 days** |
| Monetization | Free | — |
| Size | 95 MB | 30 MB |
| Requires iOS | **15.6** | 18 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [C2 Development, LLC](https://appshunter.io/developer/731463338) | [Muhammad Hanif Sugiyanto](https://appshunter.io/developer/1805376574) |

## 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


### Stack

[App page](https://appshunter.io/ios/app/stack-warranty-and-receipt/id6760860411)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stack Pro 1 Week | $7.99 | per 7 days |
| Stack Pro 1 Year | $129.99 | per year |


## Frequently asked questions

### Is Mobius free?

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

### Is Stack free?

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

### Do Mobius or Stack have ads?

Neither Mobius nor Stack shows ads.

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

Mobius ships an update every 2 months, and Stack every 10 days. Most recently, Mobius was updated on October 9, 2026 and Stack on October 10, 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.*