Comparison

OpenCat vs PinWords

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

PinWords

This app helps you master vocabulary with a minimalist design focused on spelling and efficient memorization. It offers extensive built-in word lists, personalized learning plans, and detailed statistics to track your progress. Enjoy offline access and cross-device synchronization for seamless learning.

Highlights
  • Extensive built-in word libraries
  • Vocabulary filtering by level and standard
  • Unique spelling keyboard and memory modes
  • Personalized weekly and daily learning plans
  • Detailed statistics and progress tracking
  • Offline access and iCloud synchronization
Features
Read full description

我要背单词 PinWords 是一款专注【拼写记忆】的背单词工具, 通过“拼写训练”让你真正掌握每一个单词。 为什么背了很多单词,却还是记不住?因为没有真正“拼出来”。 【拼写 · 记得更牢】 * 不再只是“看”,而是必须拼写 * 拼错自动重练,强化长期记忆 * 音节拆分,让长单词更容易掌握 【比传统背单词更有效】 * 手+眼+耳多感官记忆 * 字母级错误统计,精准查漏补缺 * 真正解决“记不住、容易忘”的问题 【强大的内置词库】 * 【英语】包含四六级、考研、出国、大学、高中、初中、小学等各个阶段的词库 * 【韩语】包含 韩国语能力考试(TOPIK) TOPIK I、TOPIK II 、TOPIK I 拓展词、TOPIK II 拓展词 * 【日语】包含 日本语能力测试(JLPT) N1-N5 * 【德语】包含 歌德学院(Goethe) A1 - C2 * 【法语】包含 DELF 词书、DALF 词书、法语专四、专八词书 * 【西班牙语】包含 DELE词书、 《现代西班牙语》词汇 * 【意大利语】包含 CILS词书、CELI词书、PLIDA词书 * 【葡萄牙语】包含 CIPLE A2 - C2 词书 * 词库中单词为各类词书、大纲词汇、真题、高频词、易错词等多重筛选,保留收录多的词汇。 * 离线可用,随时随地背单词不用担心无网络 【单词分级筛选】* 单词构成:列出词书中收录的低级别考试词汇 例如:四级词汇里可以查看小学、初中、高中阶段词汇占比 * 柯林斯:根据柯林斯星级对单词进行筛选 * CEFR分级:根据CEFR词汇标准进行筛选 【独特拼写记忆】 * 全新开发的拼写键盘,让拼写体验更佳 * 拆分音节:让长单词记忆更容易 * 简化模式:只保留单词组成字母,简化输入 * 朗读字母:跟随拼写朗读字母,手、眼、耳同步 * 拼错重写:加强的记忆模式,必须完美拼写 * 外接键盘:优化设计的外接键盘交互,iPhone/iPad/Mac 外接键盘体验更佳 【记忆计划】 * 每周计划:可选每周的学习/休息日,劳逸结合,避免背词焦虑 * 每日计划:根据每日背词数量自动规划完成日期 * 复习更新时间:每日复习更新时间,适合在不同时间学习的你 * 分组学习:设置每次学习新单词数量,分组记忆更高效 * 记忆算法:优化后的艾宾浩斯遗忘曲线算法,更好地记忆 【详尽统计】 * 打卡记录:记录每天完成情况并统计连续打卡 * 打卡年历:每年12个月的打卡情况一目了然 * 我的词库:记录学过的单词,支持按记忆时间、错误次数、字母排序并支持分组显示 * 单词记忆:每个单词都会显示详细的记忆次数与时间 * 错误统计:高亮显示单词中哪些字母容易记错并统计错误次数 【其他功能】 * iCloud同步:iPhone/iPad/Mac 三端数据同步,学习进度不丢失 * 单手操作:iPhone针对全手势操作优化 * 英式/美式:支持英式/美式发音+音标 * 自定义背景:可自定义自己喜欢的背景图 Privacy https://www.appnice.cn/privacy.htm Member Service Agreement (User Agreement) / terms of use https://www.appnice.cn/useragreement.html

Screenshots

OpenCat4 screens
PinWords4 screens

Verdict

The call

The clearest difference is rating: OpenCat at 4.6 against PinWords's 4.0. OpenCat also leads on ratings volume (841 vs 8) and review sentiment (65% vs 50%). On price, ads, in-app purchases and monetization model 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 PinWords sells 2 in-app purchases, starting at $5.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

OpenCat holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: OpenCat has 841 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 65% of OpenCat's written reviews are positive against 50% of PinWords's.

UpkeepUpdate frequency

OpenCat ships an update weekly, PinWords every 3 weeks. The most recent releases landed on September 24, 2026 and September 10, 2026 respectively.

Scorecard4 real differences · 6 level
OpenCat versus PinWords: the parameters behind the verdict, then further details
ParameterOpenCatPinWords
PriceFreeFree
Rating4.6 (841 ratings) — better4.0 (8 ratings)
Positive reviews65.3% of reviews — better50.0% of reviews
Number of ratings841 — better8
Update frequencyWeekly — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, MaciPhone, iPad, Mac
Requires iOS17.016.0 — better
Further details — not scored
Size96 MB82 MB
Age rating17+4+
DeveloperEarly Moon, LLCDetailsoft Co., Ltd.

Customer experience

OpenCat

All ratings841 ratings
Positive91.3%
Neutral2.1%
Negative6.5%
Written reviews193 reviews
Positive65.3%
Neutral10.4%
Negative24.4%

PinWords

All ratings8 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

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)

PinWords

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

PinWords

Subscriptions1
  • 全功能解锁(活动)7 Days trial$5.991 Year
One-time1
  • 终身完整版$14.99

Questions

Is OpenCat free?
OpenCat is free to download, with in-app purchases available.
Is PinWords free?
PinWords is free to download, with in-app purchases available.
Which has better reviews, OpenCat or PinWords?
OpenCat is rated higher. OpenCat averages 4.6 out of 5 from 841 ratings, while PinWords averages 4.0 from 8 ratings.
Do OpenCat or PinWords have ads?
Neither OpenCat nor PinWords shows ads.
Which is updated more often, OpenCat or PinWords?
OpenCat ships an update weekly, and PinWords every 3 weeks. Most recently, OpenCat was updated on September 24, 2026 and PinWords on September 10, 2026.

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