Run Gemma, Qwen, and more completely offline. Use ChatGPT, Grok, Claude, or any other model online. Chat with voice, vision, and files. esper is your private AI chat.
esper - Offline & Private AI is your personal AI chat app—designed to keep your conversations private and powerful.
Run open-source models completely offline on your iPhone. With esper - Offline & Private AI, you can choose to keep your data on your device. No tracking.
Key Features of esper - Offline & Private AI:
– Run Offline
Download top open-source models like Qwen, Gemma, and DeepSeek directly to your phone—fully functional even without internet or WiFi.
– Bring Your Own Key
Prefer ChatGPT or Claude? Plug in your own API key and get instant access to premium models from their providers. Swap between models anytime, even within the same conversation.
– Multimodal Support
Chat with models that support vision for images, PDFs, and other files.
– Local RAG knowledge bases
Upload documents into organized collections that you can add to chats to provide extra context for models, all 100% private and offline.
– Local Image Generation
Run stable diffusion directly on your device for unlimited image generations, with esper Pro.
– Web search
Ground your requests with search results with any model, or use native web search from providers like Google, xAI, OpenRouter, and more.
– Shortcuts
Send prompts and attachments to esper from shortcut workflows
– Branching Conversations
Explore different chat paths and easily toggle between threads.
– Privacy-First
No analytics, no log storage, no server necessary. esper - Offline & Private AI gives total user control to choose completely offline chats, or connect with their favourite online providers. The choice is yours.
– Custom GPTs & Model Swapping
Build and edit your own GPTs. Switch models mid-conversation—from Gemini to Claude in a single chat.
– Customizable
Adjust the interface to match your personal style. Take control of conversations with editing, deleting, or retrying messages.
– iCloud Sync
Sync conversations across your devices with Pro.
– Go Pro
Pro gives you unlimited model downloads, local image models, knowledge base access, iCloud Syncing, Kokoro voice model, and optional color themes and animations.
If you want an AI chat experience that’s powerful, flexible, and private, esper - Offline & Private AI is built for you.
It's a cool app but I get a local model unknown error after getting like 5 reply from the model
Developer Response
Hey sorry to hear that! Please send me a message (check the settings menu for options to contact me) with more information about your issue so I can fix this for you.
A must-download
Chase McCarty
Great idiot-proof little app for running all the major LLMs locally. Feels like a must-have incase your ever lose internet or there’s an apocalypse scenario of some kind
Best third party mobile AI app
jrgxheudf
Simple. One time fee with BYOK. Works with a ton of models. Has knowledge base/RAG.Incredible tool.
This update of esper - Offline & Private AI includes new features and bug fixes. Visit esper-ai.com/changelog for more information.
Version 1.6.0
The developer, Cody Ingram, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Purchases
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
Supported Features
VoiceOver
Voice Control
Information
Seller
Cody Ingram
Size
155.2 MB
Category
Productivity
Compatibility
Requires iOS 17.0 or later.
iPhone Requires iOS 17.0 or later.
iPad Requires iPadOS 17.0 or later.
Mac Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
