Comparison

OpenCat vs Diting 谛听

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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

About

Diting 谛听

Features
Read full description

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

OpenCat4 screens
Diting 谛听4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
OpenCat versus Diting 谛听: the parameters behind the verdict, then further details
ParameterOpenCatDiting 谛听
PriceFreeFree
Rating4.6 (851 ratings) — better—
Positive reviews64.6% of reviews—
Number of ratings851 — better—
Update frequencyWeeklyEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Mac — betteriPhone, iPod
Requires iOS17.015.0 — better
Further details — not scored
Size96 MB27 MB
Age rating17+4+
DeveloperEarly Moon, LLCAU 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
Show 1 more
  • 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
Show 2 more
  • 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

4 purchases

OpenCat

Subscriptions2
  • Cloud AI3 Days trial$3.991 Month
  • Cloud AI$24.991 Year
One-time2
  • Tokens Package$5.99
  • OpenCat Pro$9.99
2 purchases

Diting 谛听

Subscriptions2
  • Diting Pro1 Month trial$9.991 Month
  • Diting Pro Annual$79.991 Year

Questions

Is OpenCat free?
OpenCat is free to download, with in-app purchases available.
Is Diting 谛听 free?
Diting 谛听 is free to download, with in-app purchases available.
Do OpenCat or Diting 谛听 have ads?
Neither OpenCat nor Diting 谛听 shows ads.
Which is updated more often, OpenCat or Diting 谛听?
OpenCat ships an update weekly, and Diting 谛听 every 2 days. Most recently, OpenCat was updated on October 25, 2026 and Diting 谛听 on October 11, 2026.

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