Best 5 Offline AI App For iPhone

Published on January 26, 2026|7 min read
Best Offline AI Apps

AI on your iPhone doesn't always need an internet connection. These apps let you run powerful AI models directly on your device, giving you fast responses, strong privacy, and zero cloud-dependency — perfect for travelers, researchers, students, and anyone who values privacy.

1. Offline Private AI Library (Opal AI)

Opal AI (Offline Private AI Library) is a fully offline AI app that lets you download and run modern large language models directly on your iPhone. It's designed for privacy and performance — no accounts, no cloud, and no internet after initial setup. You can browse curated MLX and Hugging Face repositories, download local LLMs, and have natural conversations with the AI without data leaving your device.

Why it stands out:

  • Works completely offline once models are downloaded
  • Supports MLX and Hugging Face models for diverse AI use cases
  • Great for sensitive research, travel, and private AI interactions

Chat with AI, Even When You're Offline

Download once and chat anytime, anywhere, completely offline. No internet, no tracking, just AI chatbot on your iPhone.

Download on the App Store
OPAL AI

2. ThinkByte – Offline AI Chat

ThinkByte is one of the most polished offline AI assistants for iPhone. It runs multiple on-device AI models and doesn't require internet to chat, generate text, or get answers. Users love its simple interface and privacy-first design.

Key features:

  • Multiple offline AI models with different strengths
  • Supports chat conversations without lag
  • Ideal for quick responses anywhere — flights, remote areas, or offline usage

3. Locally AI

Locally AI lets you run powerful language and vision models completely on your iPhone or iPad, with optimized voice interaction support. Think Siri with more capability and voice mode — all powered by Apple Silicon on your device.

What makes it great:

  • Local voice interaction with on-device recognition
  • Customizable prompts and system behavior
  • Integrates with Siri and Shortcuts for easy access

4. Noema – Local AI & Offline Knowledge

Noema emphasizes knowledge-rich local AI. You can upload documents like PDFs or textbooks and use them with offline models for contextual responses. It's designed for users who need deeper, research-oriented AI interactions on their iPhone without any cloud dependency.

Highlights:

  • Supports custom datasets and local embedding
  • Works fully offline with privacy guaranteed
  • Excellent for study, research, and reference tasks

5. On-Device AI

On-Device AI offers a suite of AI tools that don't require internet access after setup. In addition to offline chat, it includes voice transcription, real-time speech-to-text, and conversational AI features — all processed locally on your device.

Why users love it:

  • Voice and speech integration fully on-device
  • Powerful multi-agent workflows
  • Great for productivity and complex tasks without cloud dependency

Bonus Mention: Privacy AI

Privacy AI is another solid offline option that focuses on customization and privacy first. It runs local open-source models on iPhone and keeps all data on-device.

How to Choose the Right Offline AI App

  • Privacy & simplicity: Opal AI, ThinkByte
  • Voice interaction & integration: Locally AI, On-Device AI
  • Research & document support: Noema
  • Customization & control: Privacy AI

Frequently Asked Questions