OpenCat vs ChatMate+
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OpenCat
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.
- 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
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Bring AI into every part of your workflow: chat, writing, translation, and search. · Multiple model options — local models, API Key, Cloud subscription, Apple Intelligence · MCP — supports MCP and tool calls · Web search — available on OpenCat Cloud and select providers · System-wide translation — select text in any app for instant AI translation · Content rendering — supports LaTeX formulas, Markdown, and code highlighting · Cross-platform — natively built for Mac, iPhone, and iPad · Data privacy — stored locally, synced across devices via iCloud [Pro Features] · AI Keyboard — invoke AI right in the text field of any app to polish or reply in one step · OpenCat Cloud subscription provides access to all major models [A Variety of Models] · OpenCat Cloud — fast access to leading models · Local models — one-tap download of open-source models for offline use, accelerated by Apple silicon · BYOK — use your own API Key, including Coding Plan · System models — supports Apple Foundation Models [OpenCat Cloud — Ready to Use, No Setup] · No sign-up, zero configuration, all major models supported · 50+ models — ChatGPT, Claude, Gemini, Grok, DeepSeek, GLM, MiniMax, Kimi, Qwen, Doubao, and more, all in one place · Online search supported [System-Level AI Translation] Set OpenCat as your default translation app to translate selected text directly in Safari, Mail, Notes, and any other app. Powered by large language models, translations are natural and fluent — far superior to traditional translation engines. [Local Models, Offline Inference] · One-tap download — popular open-source models like Llama, Qwen, and Gemma · Apple silicon acceleration — built on Apple's official MLX framework, fully leveraging GPU performance for fast, energy-efficient inference · Fully offline — works without internet, conversation data never leaves your device [Use Your Own API Key] · 25+ providers supported — OpenAI, Claude, Gemini, DeepSeek, Kimi, Qwen, Doubao, ERNIE, and more [Contact Us] Email: support@dreamoon.ai Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy & Third-party AI Service Privacy Policy https://opencat.app/privacy
ChatMate+
This AI-powered chat application enhances conversations and productivity. It acts as a writing assistant, coding helper, counselor, teacher, and translator, offering intelligent replies and creative inspiration.
- Intelligent AI chat
- Writing enhancement
- Code debugging and optimization
- Psychological counseling
- Knowledge answers and teaching
- Creative writing inspiration
- Multi-language translation
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ChatMate is a chat application based on Open AI GPT-3 technology that provides intelligent replies based on your chat content, making your conversations more convenient and efficient. ChatMate is versatile and can meet various needs. For example, it can serve as a writing assistant to enhance your writing efficiency and quality. As a software engineer, it can help you solve development problems such as syntax errors, code optimization, and debugging. It can also serve as a counselor to listen to your thoughts and provide professional psychological counseling and support. As a teacher, it can provide knowledge answers and teaching suggestions, making your learning more efficient and enjoyable. As a novelist, it can provide creative inspiration and writing advice to make your novel more vivid and appealing. It can also serve as a language translator to accurately translate multiple languages. Additionally, ChatMate can also play various roles, such as a doctor, financial analyst, SEO expert, debater, nutritionist, stylist, chef, fitness coach, makeup artist, yoga instructor, babysitter, emotional analyst, astrologer, dream interpreter, career consultant, terminal interpreter, philosopher, etc. Download ChatMate now and configure your Open AI API Key to start a new intelligent chat experience! If you have any suggestions, please rate and leave a message or send an email to leo@chat-mate.app for feedback. This will help us continuously optimize the product and improve the user experience.
Screenshots
Verdict
The clearest difference is rating: OpenCat at 4.6 against ChatMate+'s 4.0. OpenCat also leads on ratings volume (851 vs 1). ChatMate+'s advantage is review sentiment (100% vs 65%) and in-app purchases (none vs 4). On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. OpenCat sells 4 in-app purchases, starting at $3.99 per month. ChatMate+ asks for nothing beyond the download.
OpenCat holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: OpenCat has 851 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 65% of OpenCat's written reviews are positive against 100% of ChatMate+'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 weekly. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.
| Parameter | OpenCat | ChatMate+ |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (851 ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 64.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 851 — better | 1 |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 96 MB | 20 MB |
| Age rating | 17+ | 17+ |
| Developer | Early Moon, LLC | 佩佩 杨 |
Customer experience
OpenCat
ChatMate+
Bugs and requests
OpenCat
Reported bugs
6 issues- Streaming response disruptions
- Disappearing API key input fields
- Inconsistent Markdown rendering
- Keyboard extension not working as expected
- Sync issues between devices
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- Crashes and freezes when handling large inputs
Requested features
7 requests- 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
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- Prompt library and sharing functionality
- Integration with other productivity apps (e.g., Shortcuts)
ChatMate+
Not enough reviews yet to summarise bugs or requests.
In-app purchases
OpenCat
- Cloud AI3 Days trial$3.991 Month
- Cloud AI$24.991 Year
- Tokens Package$5.99
- OpenCat Pro$9.99
ChatMate+
No in-app purchases









