Xian Mandarin Academy
Master Mandarin with AI Tonal Coaching & Peer-Up Audio
What it does
Xian is a social-first Mandarin learning ecosystem (HSK 1-6). We combine AI-powered Tonal Coaching with a unique 'Peer-Up' mode that connects you with real learners globally for audio-only conversations. No bots, just real practice
Does the same job
all alternatives →- ITI trained a 9M speech model to fix my Mandarin tonesJan 2026 · simedw.com · ▲469
Built this because tones are killing my spoken Mandarin and I can't reliably hear my own mistakes. It's a 9M Conformer-CTC model trained on ~300h (AISHELL + Primewords), quantized to INT8 (11 MB), runs 100% in-browser via ONNX Runtime Web. Grades per-syllable pronunciation + tones with Viterbi forced alignment. Try it here: https://simedw.com/projects/ear/
- MTMandarin Tone Trainer – A ‘Helping Ear’ for Mandarin Pronunciation2019 · mandarintonetrainer.com · ▲237
- AAAn “automatic” way to learn Chinese2018 · play.google.com · ▲57
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I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
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Hey HN, Henry from Cactus here! We previously released Cactus Needle, a 14MB agentic LLM for tool call, device use, and structured extraction for phones, wearables, smart homes, small robots and microcontrollers. We got really great feedback here, and have now incorporated the suggestions to release Needle 2. The whole model is a single 14MB binary that runs a full session in 28MB of RAM; 45m parameters at 2bit compression. Needle hits 500 tokens/sec decode speed on a Raspberry Pi 5, sits between 400-1,500 tokens/sec on VR devices like Meta Quest 3S and Apple Vision Pro, and ranges…
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Launched alongside, March 2026
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