Solum — Private, Local AI

Solum runs open AI models directly on your iPhone, so your prompts, responses, images, and conversation history stay on your device. Start free with Bonsai 1.7B. Upgrade once to Solum Premium to unlock every model and setting—no subscription. ON-DEVICE AI CHAT • Chat without sending prompts to an inference server • Render structured Markdown responses • Keep multiple conversations saved locally • Use image attachments with supported multimodal models CHOOSE YOUR MODEL • Bonsai 1.7B is included free • Premium unlocks Bonsai 4B, 8B, and 27B • Premium also unlocks Gemma 4 E2B • Large models use a memory-safe mode by default PRIVATE BY DESIGN • No account required • No cloud inference • Conversations and attachments remain on-device • Downloaded models are stored locally and can be removed at any time SOLUM PREMIUM A one-time $14.99 purchase unlocks all models, image understanding on supported models, and every setting. No subscription.