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esper - Offline & Private AI

esper - Offline & Private AI

On-device LLM Chat

8 ratings
3 reviews
🔧 Utilities
📊 Productivity
$4.99 Free
In-App Purchases

Lowest price: $0.99 a year ago (-%)

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Price history

Details

  • Released
  • Updated
  • April 13, 2025
  • June 10, 2026

Features

Developer

Cody Ingram
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About

This AI chat app allows you to run open-source language models completely offline on your device. You can also connect to premium models using your own API keys. It offers features like multimodal support, local knowledge bases, and branching conversations for a private and powerful AI experience.

✓Run open-source models offline
✓Connect with your own API keys
✓Multimodal support for images and PDFs
✓Local RAG knowledge bases
✓Branching conversations
✓Customizable interface
✓iCloud sync (Pro)
Show original description

What's New in esper

1.6.4

June 10, 2026

This update of esper - Offline & Private AI includes new features and bug fixes. Visit esper-ai.com/changelog for more information.

2

In-App Purchases

$12.99

esper Pro

Unlimited model downloads, color themes and animations

User reviews

Most RecentHighest RatedLowest Rated

Error

It's a cool app but I get a local model unknown error after getting like 5 reply from the model
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Response from developer

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.

Best third party mobile AI app

Simple. One time fee with BYOK. Works with a ton of models. Has knowledge base/RAG.

Incredible tool.
afurrylittlerabbitafurrylittlerabbit

A must-download

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
Chase McCartyChase McCarty

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FAQ

What is esper's core functionality?

esper allows you to run powerful AI language models directly on your iPhone or iPad, completely offline. This means your conversations and data stay on your device, ensuring maximum privacy and control.

Can I use online AI models with esper?

Yes, esper offers flexibility. You can choose to run models offline, or you can plug in your own API keys to access premium online models like ChatGPT or Claude, and even leverage internet search capabilities.

What kind of data can esper process?

esper supports multimodal interactions, allowing you to chat with models that can process images, PDFs, and other files. You can also create local RAG knowledge bases by uploading your own documents for private context.

How does esper handle privacy?

Privacy is a primary focus for esper. The app has no analytics, no log storage, and requires no server connection for its offline features. You have total control over your data and conversations.

What are the benefits of esper Pro?

esper Pro unlocks additional features such as unlimited model downloads, full knowledge base access, iCloud syncing across devices, the Kokoro voice model, and optional cosmetic customizations like color themes and animations.

Is esper suitable for younger users?

esper has an age rating of 12+, indicating it is intended for users aged 12 and above. This is typical for AI applications that may involve complex interactions and content.

How often is esper updated?

The latest version of esper is 1.4.1, which was last updated on March 25, 2026. This indicates a commitment to ongoing development and feature enhancements.

What devices does esper support?

esper is available for both iPhone and iPad, allowing users to experience its powerful AI capabilities on their preferred Apple mobile devices.