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Skipper Study is a web-based Day Skipper theory practice tool with randomized quiz rounds, review at the end of each round, and a free daily lesson email. It helps learners revise topics such as buoyage, lights, tides, chartwork, navigation, safety, and the rules of the road.
GameGrad turns PDF study material into quiz questions that appear inside arcade games, so users can practice active recall while they play. It offers a free tier with one PDF and a Pro plan with more uploads, more questions, and answer explanations.
ChessBout is a web-based chess puzzle app with daily timed challenges, untimed solo practice, and 1v1 duels. It helps players sharpen tactics through themed puzzle sets, leaderboards, and head-to-head puzzle races.
Socrati turns notes, PDFs, videos, photos, or a typed topic into interactive AI-generated courses with lessons, quizzes, flashcards, and audio. It helps people study from their own materials in short mobile-friendly sessions.
tradeguessr 是一款基于网页的交易形态训练器，让用户在真实蜡烛图上预测走势。可免费游玩，并提供全球排行榜以及包含课程和练习回合的 Dojo。
Lexie is an AI study app that turns photos, notes, PDFs, and screenshots into flashcards, quizzes, practice exams, and audio review. It helps students study with active recall and spaced repetition without manual setup.
SecuSpark 是一款游戏化的 CompTIA 考试备考网页应用，提供练习题、闪卡、AI 解析和对战式学习模式，帮助备考 Security+、A+、Network+、CySA+ 和 PenTest+。
Recall is a personal AI knowledge base for saving, summarizing, organizing, and chatting with articles, videos, podcasts, PDFs, and notes. It offers a free plan plus paid tiers for heavier use and model control.
Show Me a Leaderboard 是一款用于团队、俱乐部和社区挑战的网页应用，可创建自定义比赛和排行榜，支持参与者追踪、品牌控制与互动功能。
Wordie is a Chrome browser extension for building and reviewing vocabulary while you browse. It highlights saved words on web pages, supports active recall practice, and keeps words, notes, and analytics stored locally on your device.
Glimpse turns notes, syllabi, and other study sources into flashcards, quizzes, and fill-in-the-blank cards, then helps you review them with spaced repetition. It is available on the web and on iOS, with Android listed as coming soon.
HoneyComb is a prediction market for jobs where users make picks on which professions AI will replace. It offers job market pages, trade data, and a trader leaderboard for comparing views and activity.
Trivia by Typito AI is an AI quiz and trivia video generator for creating interactive quiz content from a topic prompt. It supports multiple quiz formats, multilingual output, and a flow that can export quizzes or convert them into videos.
Educato is a browser-based exam preparation platform with study plans, practice tests, flashcards, lessons, and a community feature. It supports students preparing for a wide range of exams and introduces an AI tutor named Plumi.
Jungle is an AI study platform that turns lecture slides, PDFs, videos, and other source material into flashcards, quizzes, and practice questions. It helps students study with generated questions, review feedback, and Anki export on the paid plan.
BrainBurst is a free quiz platform for IQ-style challenges and UPSC/SSC exam preparation. It offers timed practice, score feedback, and review explanations with no account required.
Socra is an AI learning platform built around Socra AI Tutor and SocraDraft, using guided questioning to help people understand concepts, organize thinking, and turn dialogue into notes or drafts. It supports web, iOS, and Android use with typed, spoken, or photo input.
Lingofable is a story-based language learning app that helps learners practice reading at an appropriate level and review new vocabulary in context. It currently supports Spanish, with Android listed as coming soon.
Socra 是一款 AI 学习平台，提供 Socra AI Tutor 用于引导式学习，SocraDraft 用于将零散想法整理成结构化写作；强调主动学习、苏格拉底式提问与可复用输出。
BrainBurst is a free quiz platform for IQ practice and UPSC/SSC exam preparation. It offers multiple quiz modes, answer review with explanations, and benchmarked results without requiring registration.