Cortex | Online & Offline AI

Name: Cortex | Online & Offline AI
Availability: InStock
Rating: 3.8181817531585693 (395 reviews)
Author: Vertex Corporation

Vertex Corporation

In-app purchases

3.8

395 reviews

10K+

Downloads

Teen

About this app

Welcome to the core of artificial intelligence!

Cortex is an advanced AI platform that brings together hundreds of the world’s most powerful models into a single hub. It works even without an internet connection so you're never left stranded, collects zero chat data, and is completely customizable.

Think that's all?

• Dynamic Chat: Stop wasting time choosing an AI. Cortex automatically selects the best model for every single prompt, perfecting the responses you get.

• Advanced Tools: Weather, code execution, calendar, crypto data, global stock markets, and much more. Cortex's AIs are fully equipped!

• Voice Chat: Stop typing. Talk to your AIs as fluently and naturally as you would with a human, using real-time voice chat—even in offline mode.

• Flow Mode: Watch different AI models debate among themselves and solve complex problems autonomously. Or, jump into the discussion yourself and let the chaos begin!

• Personal Assistants: Bored of standard AIs? Have deep conversations with specialized characters like a teacher, doctor, lawyer, or even an anime girl. Don't worry—if you get bored of them too, creating your very own AI is just a few clicks away.

• Limitless Customization: Shape the interface to match your style and mood with modern, aesthetic themes.

• Transparency: Beyond keeping your data private, Cortex is a fully open-source platform. Anyone can inspect our code, or even build their own Cortex.

It's STILL not over, but if we tried to explain everything, we’d run out of characters. To experience the rest yourself, download Cortex right now and join the core of AI!

Updated on

30 Jan 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.

This app may share these data types with third parties

Location, Personal info and 5 others

This app may collect these data types

Location, Personal info and 5 others

Data is encrypted in transit

You can request that data be deleted

Ratings and reviews

3.8

386 reviews

Froilan Jr.

12 February 2026

This app is good! No ads and the offline AIs work well! However, the offline AIs are not that smart, and the AIs talk about some "multimodal content" in their responses/messages, and the filter is really strict.

Vertex Corporation

12 February 2026

Appreciate! We totally understand and we're already working on improving the offline mode. If you suggest Cortex to others, we would be more proud. 🙏🏻

Jerry Cornelius

22 January 2026

All functions behind a Paywall. As far as I could see, all AI models are minor. No test phase. Design is nice and minimalistic.

Vertex Corporation

23 January 2026

Thanks for the feedback! There may be some misunderstandings: 1) Not all features are paywalled, only server features are limited due to costs (we're a high school team 🥀). 2) Cortex includes strong series like GPT-5, Gemini 3 and Claude 4. 3) Plus features can be tried via in-app campaigns. If you increase your rating, limits may increase. 😉🙏🏻

Chukwuemeka

24 January 2026

I subscribed for ultra yet it keeps telling me I've reached my limit whenever I try to use it. This is so disgusting. I just wasted $7 of my hard earned money.

Vertex Corporation

24 January 2026

Thanks a lot for your feedback. It seems you ran into a rare glitch on our server where it mistakenly treated you as a free user, which limited your usage way more than it should have. We’ve fixed the issue now and, to make up for it, we’ve credited your account with 50 extra messages, totally on us! Sorry again for the trouble caused. Enjoy using!