OETStudy 每月有 4,738 次造訪，月增率 +264.2%，定價模式為免費。Perplexity 每月有 88,310,223 次造訪，成長率 -3.7%，定價模式為免費增值。
OETStudy is a free practice platform for the Duolingo English Test. It offers a large bank of exam-style questions, AI-powered scoring for speaking and writing tasks, CEFR vocabulary checks, and progress analytics to help learners target a higher score.
即時 AI 答案引擎與研究工作區，將聯網引用與前沿推理模型結合。
| 面向／指標 | | |
|---|---|---|
| 官方網域 | oetstudy.com | perplexity.ai |
| 定價模式 | 免費 | 免費增值 |
| 每月造訪次數 | 4738 (4,738) | 8831.02萬 (88,310,223) |
| 月流量變化量 | +3437 (+264.2%) | -339.5萬 (-3.7%) |
| 主要市場與市佔 | 🇺🇸 美國 (100%) | 🇺🇸 美國 (25.5%) |
| 每月直接造訪 | 1537 | 6332.07萬 |
| 使用者評分 | 4.4 | 4.7 |
| 支援平台 | 網站 | 網站 |
OETStudy is a free practice platform for the Duolingo English Test. It offers a large bank of exam-style questions, AI-powered scoring for speaking and writing tasks, CEFR vocabulary checks, and progress analytics to help learners target a higher score.
A large bank of DET-style items spanning speaking, writing, listening, and reading, graded by difficulty so you can practise at the level you need.
Speaking and writing submissions are scored automatically, evaluating pronunciation, fluency, grammar, and content structure with suggestions for improvement.
Check your vocabulary level against CEFR bands and build word lists clustered around the question types you practise most.
Practice statistics and score analysis highlight weak areas and show how your performance changes over time.
即時 AI 答案引擎與研究工作區，將聯網引用與前沿推理模型結合。
跨數百個來源執行多步驟迭代式網路與文件研究，交叉核對事實並產生結構化、帶引用支持的分析報告，可匯出為 PDF 或分享為互動式 Perplexity Pages。
讓 Pro 與 Max 訂閱者在 Perplexity 自有 Sonar 模型與頂級外部模型（包括 Claude 4、o3-pro 與 Gemini）之間動態切換，或並排比較多模型推理結果。
提供專屬專案工作區，使用者可上傳本機 PDF、試算表與文字檔，設定自訂助理指令，並執行結合私有文件檢索與即時網際網路搜尋的查詢。
將 Perplexity 從被動的問答擴展到代理式執行，透過 Comet 生態把高層使用者請求轉化為已完成的工作流程、多分頁瀏覽器操作與自動化資料綜合。
利用 Google 龐大的搜尋索引提供即時解答，但提供的是標準聊天介面，而非深度的研究動態。
利用 Google 龐大的搜尋索引提供即時解答，但提供的是標準聊天介面，而非深度的研究動態。
Integrates real-time social data search for breaking news, but leans more toward casual chat than structured research.
提供具代理能力的多來源研究與網頁生成功能，但相較於 Perplexity 乾淨的解答引擎，可能會顯得較雜亂。
專項更強Offers a comprehensive free index of academic literature, but lacks conversational chat synthesis for general web queries.
專項更強Offers a comprehensive free index of academic literature, but lacks conversational chat synthesis for general web queries.
專項更強與 Perplexity 廣泛的一般網路搜尋不同，它專注於經同儕審查的科學論文，以提供基於證據的解答。
Combines privacy-focused web search with AI summarization, though it requires a paid subscription for full access.
Combines privacy-focused web search with AI summarization, though it requires a paid subscription for full access.
免費練習 PTE Academic 與 PTE Core，口說寫作享 AI 評分
Prep Edu is an online language-learning and exam-preparation platform combining structured IELTS, TOEIC and HSK courses with AI-powered practice. Its Prep AI Virtual Speaking Room and Virtual Writing Room simulate real exam conditions and return feedback on grammar, pronunciation, vocabulary, ideas and logic, while the Teacher Bee AI companion offers round-the-clock guidance. Learners get a personalised roadmap, mock tests, progress tracking and mobile access for studying at home.
Prep Edu is an online language-learning and exam-preparation platform combining structured IELTS, TOEIC and HSK courses with AI-powered practice. Its Prep AI Virtual Speaking Room and Virtual Writing Room simulate real exam conditions and return feedback on grammar, pronunciation, vocabulary, ideas and logic, while the Teacher Bee AI companion offers round-the-clock guidance. Learners get a personalised roadmap, mock tests, progress tracking and mobile access for studying at home.
