SlideTutor: Turn slides into live lectures with offline AI tutors

Hey Product Hunt! 👋 I’m Zhen, co-maker of SlideTutor. Why we built SlideTutor: Creating video lectures or delivering polished presentations is usually painful. You either need expensive cameras and video editing software, or you have to rely on cloud-based AI tools that upload your sensitive slides, charge heavy subscriptions, and stall without internet. We wanted a tool that feels like having a pocket-sized broadcast studio—fast, private, and fully offline. Smol Launch What makes SlideTutor special? 🤖 Lifelike Digital Tutors: Lip-sync synchronized with your script in real-time. 📄 Slide + Script Sync: Import a PDF slide, write your Markdown script, and watch them advance in lockstep. 🎬 6 Director Modes: Switch layouts (slide-only, tutor-only, split) live, like a TV director. 🔒 100% On-Device & Offline: No accounts, no servers, zero cloud processing. Your data never leaves your device. 📺 AirPlay & Recording: Cast directly to a classroom TV or capture HD video straight to your Photos app. 🌐 Multilingual & Subtitles: Deliver lessons in English, Chinese, Japanese, and more. Who is it for? Teachers, corporate trainers, researchers, and anyone who wants to deliver high-quality, professional lectures without getting in front of a camera. 🎁 Product Hunt Special: Try it today and let us know what you think! We’d love to hear your feedback on tutor styles, multi-language support, or new feature requests. I’ll be here all day to answer your questions and chat about on-device AI. Thanks for your support! ❤️