Caelum - Local AI assistant

4.2
74 reviews
1K+
Downloads
Content rating
Everyone
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About this app

🔒 Caelum – Your Private AI Assistant
A powerful AI that works entirely offline. No account. No data sharing. Just you and your device.

💡 Why Caelum?
Most AI apps collect your data or need constant internet. Caelum is different. It’s a fully offline, secure, and anonymous assistant — perfect for anyone who values privacy.

🧠 Smart, Fast, and Local
- Chat naturally with advanced on-device AI
- No internet needed after installation
- Get instant answers, anytime
- Clean, modern design (light & dark mode)

📄 Document Reader (Private & Local)
- Import your documents
- Ask questions and get instant answers
- All files processed directly on your phone — never sent online

🌐 Web Search (Optional)
- Search current information using Brave
- Results are temporary, no history stored
- You stay fully in control

🔐 100% Private by Design
- Works fully offline
- No account, no login
- No ads, no trackers
- All data stays on your device

📱 Optimized for Android
- Fast startup and smooth performance
- Tablet-friendly layout
- Lightweight and battery-efficient

🌍 Made for Everyone
Whether you're tech-savvy or not, Caelum is built to be simple, clear, and respectful.

Download Caelum now and discover a new kind of AI — one that truly respects your privacy.
Updated on
Aug 14, 2025

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
App activity
No data collected
Learn more about how developers declare collection
Data is encrypted in transit

Ratings and reviews

4.2
74 reviews
John Paluska
October 4, 2025
First off this is a pretty good app. Intuitive, easy-to-use, and stylish. It is my fsvorite thus far because of these reasons. However... this is ahat makes it almost unusable: It takes a some time for the AI to initialize and an extra long time for it to search the internet. And plenty of times it yields inaccurate internet answers. Once it is up and running the AI is fast, but it takes a bit too long to initialize, I think. Not a super long time, but just slightly too long.
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nolanpcrd
October 4, 2025
Thank you for your feedback, In any case I will continue to improve it in the future as new models come out, but for the moment I can hardly do better in terms of speed and adaptability on as many phones as possible. It's just still a bit early, but I think later it will be more and more useful, usable and fast!
Fraz
October 13, 2025
Thank you so, SO much for developing such a fantastic AI app. This is certainly the best app I've found for running an LLM locally on mobile. The UI design is cute, colorful, and neat, and the AI itself is such a sweetheart! ❣️ The only thing that's missing are custom instructions. We need to be able to customize the AI's personality and give it general info to keep in mind for all conversations. Once that's added, I'll change to five stars. 🌟 Thank you for your hard work! ✨
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nolanpcrd
October 13, 2025
Thank you !!
Vengirgirem
August 13, 2025
Calling it the first accessible local AI app is a massive overstatement, but that's just marketing for you. The app itself is nice, having a good UI and being easy to use. Would recommend adding more models of different sizes to choose from in the future to allow people to balance between performance and quality of responses
3 people found this review helpful
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nolanpcrd
August 13, 2025
In fact, the goal is really to make it plug-and-play, unlike other apps in the same genre, hence the "first accessible local ai app" -> everyone can use it!

What’s new

10th official release !

New features :
- Better Web Search
- Now handles images with text and PDFs
- Handles documents way better
- You can now delete messages
- Bug fixes
- Added Ukrainian language support