Mastering On-Device GenAI: How to Fine-Tune LLMs for Android Using LoRA and Kotlin 2.x

The dream of a truly personal AI—one that lives entirely on your smartphone, understands your medical history, drafts your legal emails, and critiques your code without ever sending a single byte to the cloud—is no longer science fiction. However, for Android developers, this dream has traditionally been deferred by a harsh reality: the "Weight Explosion Problem." Large Language Models (LLMs) are massive. Even "small" models like Gemini Nano or Llama 3 8B require gigabytes of VRAM and billions o