# OpenCat vs Aether

The clearest difference is price: OpenCat at Free against Aether's $2.99. Aether's advantage is in-app purchases (none vs 4) and chart position (#174 vs unranked). On ads, device support and iOS requirement there is nothing between them.

OpenCat is free to download; Aether costs $2.99 up front. OpenCat sells 4 in-app purchases, starting at $3.99 per month. Aether asks for nothing beyond the download.

## The numbers

| Metric | OpenCat | Aether |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.6 (847 ratings)](https://appshunter.io/ios/app/opencat-ai-chat-agent-mcp/id6445999201/reviews)** | — |
| Number of ratings | **847** | — |
| Positive reviews | 64.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | — |
| Monetization | Free with in-app purchases | — |
| Best chart rank | — | **#174** |
| Size | 96 MB | 74 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Early Moon, LLC](https://appshunter.io/developer/1119881923) | [堃 周](https://appshunter.io/developer/6793560803) |

## What reviewers say

### OpenCat

[App page](https://appshunter.io/ios/app/opencat-ai-chat-agent-mcp/id6445999201)

This AI utility tool offers seamless integration of advanced AI models into your daily routine on Mac, iPhone, and iPad. It features a user-friendly interface, keyboard extensions for in-app AI access, and Siri/shortcut integration for automation. Supports a wide range of popular AI models and offers team deployment options.

**Highlights:** Support for latest popular AI models, Keyboard extensions for in-app AI, Realistic voice synthesis, Siri and shortcut integration, Team deployment with Docker, Customizable AI parameters, Markdown content rendering

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cloud AI | $3.99 | per month |
| Cloud AI | $24.99 | per year |
| Tokens Package | $5.99 | one-time |
| OpenCat Pro | $9.99 | one-time |

**What reviewers like**

- 🚀 Fast and responsive
- 👍 Convenient and user-friendly
- 💡 Customizable API integrations
- 🌐 Syncs across devices
- 🎨 Clean and visually appealing design

**What reviewers complain about**

- 🐛 Bugs and performance issues
- 🔒 Lack of custom API support
- 💻 Compatibility issues with older devices/OSes
- 🗂️ Difficulty managing conversations
- 📤 Inability to export chat data

**Reported bugs**

- Streaming response disruptions
- Disappearing API key input fields
- Inconsistent Markdown rendering
- Keyboard extension not working as expected
- Sync issues between devices

**Requested features**

- Support for more AI models (e.g., Ollama, Groq)
- Markdown rendering for chat responses
- Ability to upload images and files
- Customizable keyboard extensions
- Background task support for long-running queries


### Aether

[App page](https://appshunter.io/ios/app/aether-open-source-ai-agent/id6793855391)

**Currently charting:** #174 Top Paid · Productivity (US App Store)

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenCat free?

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

### Is Aether free?

Aether costs $2.99, with no in-app purchases.

### Do OpenCat or Aether have ads?

Neither OpenCat nor Aether shows ads.

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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.*