I've spent the last few months building solutions for friends and small businesses and creating mobile applications using Claude Code and Codex. Didn't get as much traction as I would have hoped for.
Last week I spent a bit more time on running models locally on my iPhone. I wanted to see what you can get done on a model with < 4B parameters and also keep my conversation private. My initial stab at it is JackAI.
It is an AI assistant leveraging local models. It supports Apple Foundation models as well as open-weight models like Qwen 3.5 2B, Gemma 4 E2B, Whisper, etc. You can use it to chat with files, live transcription, live translation, OCR, text summarization and even deterministic actions like generating a QR code.
It is available for free in the Apple App store: https://apps.apple.com/us/app/jackai-offline-ai-assistant/id...
If you have a few minutes to download it and try it out, it would be appreciated. I'm looking for feedback and impressions.
Let me know what you think!