My use case for this is: When I'm flying or travelling by train, my mind often wanders. The brain starts to generate ideas and questions. And on most flights, as well as trains there's no internet access to google the answers or ask ChatGPT or DeepSeek. I've found the following apps for Android: Private AI, Pocket Pal, Llamao They do really work without internet. Yes, these LLMs are not as robust as ChatGPT or DeepSeek. But they can still be useful. Just be mindful that they may be wrong due to lack of information on the topic.