OpenCat vs Diting 谛听
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
Diting 谛听
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Put your phone on the table and press Start — what they say in English becomes Chinese you understand, and what you say in Chinese becomes English they understand. 打开Diting(谛听),按下开始——对方说的英文,实时变成你看得懂的中文。 Diting(谛听)是为海外华人做的实时双语字幕工具。看房、贷款、看医生、见学校老师……听力跟不上的场合,让谛听帮你听。 ■ 实时双语字幕 中文大字为主,英文原文对照。手机放在桌上就能看,不用拿在手里。 ■ 谈话自动留底 停止后自动生成摘要:要点、决定、待办,一目了然。摘要可编辑,可选中文或 English(英文摘要可直接发给对方确认)。 ■ 只存文字,不保存录音 声音即时转成文字后即弃,服务器上没有任何音频。屏幕上有"给对方看"的说明卡,坦坦荡荡。 ■ 免费即可开始 每月 10 分钟免费额度。Diting Pro 订阅(US$9.99/月)解锁每月 40 小时、单次最长 2 小时。 ■ 你说中文,它替你说英文 每句译文旁有个小喇叭,点一下用自然人声念给对方听。顺嘴说「帮我跟他说……」「帮我问一下他……」,谛听只翻要转达的话并自动念出来。 Terms of Use (EULA): https://www.diting.app/terms Privacy Policy: https://www.diting.app/privacy
Screenshots
Verdict
The clearest difference is update cadence: Diting 谛听 at every 2 days against OpenCat's weekly. Diting 谛听 also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases 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 and Diting 谛听 sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
OpenCat ships an update weekly, Diting 谛听 every 2 days. The most recent releases landed on October 25, 2026 and October 11, 2026 respectively.
| Parameter | OpenCat | Diting 谛听 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (851 ratings) — better | — |
| Positive reviews | 64.6% of reviews | — |
| Number of ratings | 851 — better | — |
| Update frequency | Weekly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPod |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 96 MB | 27 MB |
| Age rating | 17+ | 4+ |
| Developer | Early Moon, LLC | AU GUIDE PTY LTD |
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)
Diting 谛听
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
Diting 谛听
- Diting Pro1 Month trial$9.991 Month
- Diting Pro Annual$79.991 Year









