Rockd vs StuhDee

Explore, learn about, and document your geologic surroundings! Whether you are a professional geoscientist or curious about the rocks around you and the stories they tell, Rockd allows you to explore and learn about the geologic record, contribute your own observations, and log your journey through the geologic record. Features: - Instant access to geologic and geographic summaries of your current location via a Dashboard - Interactive global access to more than 290 geologic maps, with more being added weekly - Explore the landscape with a dynamic, 3D virtual globe - Save maps for use in the field with a built-in map caching system - See your past location and explore paleogeographic maps from C.R. Scotese and GPlates - View Macrostrat stratigraphic columns where available (beta) - Explore published literature containing mentions of mapped geologic units (when available) via xDD (formerly, GeoDeepDive) - Elevation data for most points on Earth from digital elevation models (DEMs) - Add your own field observations even offline; tag features from Macrostrat and the Paleobiology Database - Record strike/dip or trend/plunge for geologic features, using your phone's compass - Track your progress through the geologic record privately, or share it with others - See the public activity of other users and share your own and other public checkins using unique URLs Rockd is produced by the Macrostrat lab in the Department of Geoscience at the University of Wisconsin - Madison. Support provided by the National Science Foundation (NSF) and the Dept. of Geoscience. Experiencing issues? Send an email to contact@rockd.org and we will do our best to help you resolve it.

Stop typing flashcards. Start studying. StuhDee is a spaced-repetition flashcard app built for students who are tired of spending hours making decks by hand. Paste your notes, drop in a PDF, share a link, or snap a photo of your textbook — AI turns your material into clean, study-ready flashcards so you can focus on learning, not formatting. AI that does the busy work Your study material is already there. StuhDee reads it and builds question-and-answer cards for you — the kind you’d actually want to review. No more copying definitions line by line or guessing what to put on the front of the card. • Generate full decks from pasted notes, PDFs, URLs, and images • Get smarter cards with AI suggestions — shorter answers, clearer questions, memory hooks, and splits when a card tries to do too much • Study coach helps when you miss a card — practical explanations and memory tricks, not just “wrong, try again” • Language learning support — translations, native script, examples, and reverse cards for vocabulary and phrases • Weekly AI insights that point you at weak spots and tell you what to study next Spaced repetition that actually works StuhDee schedules your reviews using proven spaced-repetition science (SM-2). Cards you know well show up less often. Cards you struggle with come back at the right time. You rate how well you remembered each answer, and the app adapts. See your progress — and fix what’s slipping Built-in analytics show you more than a score at the end of a quiz: • Day streaks to keep you coming back • Accuracy, retention, and recall quality over time • Weak cards surfaced automatically so you know what needs work • Session history and activity charts • Review forecasts so you know what’s due ahead • Card state tracking — new, learning, and mastered Built for real study sessions Organize decks by topic with custom icons and colors. Run focused quiz sessions. Flip cards, rate your recall, and let the schedule handle the rest. Whether you’re prepping for exams, learning a language, or memorizing medical terms, StuhDee keeps everything in one place. Why students choose StuhDee Most flashcard apps make you do all the work upfront. StuhDee meets you where your notes already are — syllabus, slides, textbook page, or scribbled lecture notes — and turns them into a deck you can start reviewing in minutes. Add streaks, analytics, and AI coaching on top, and you get a study system that feels less like homework and more like progress you can see. Download StuhDee and turn what you’re already reading into flashcards you’ll actually remember. StuhDee helps you study with flashcards and quizzes. FREE includes: • Create up to 2 study decks • Manual flashcards & quizzes • Basic study stats StuhDee Pro ($4.99/month, auto-renewable subscription) unlocks: • AI deck generation (notes, PDF, URL, photo) • AI card improvement & study coach • AI weekly insights & advanced analytics • Unlimited decks Payment is charged to your Apple ID. Manage or cancel anytime in Settings → Apple ID → Subscriptions. Terms and Privacy Policy are linked in the app. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://stuhdee-privacy.vercel.app/