Amazing offline mode
I loved the offline document AI. The results were amazing and being able to not only get great answers but also read the pages and flip through document was next level!
Free
About
This AI assistant empowers professionals with private, on-device intelligence for document analysis and knowledge retrieval. It offers offline capabilities, custom AI models built from your data, and supports various AI providers for ultimate flexibility and data sovereignty.
✓On-device AI with Apple Intelligence
✓Offline AI capabilities
✓Private Capsules for custom AI models
✓Support for multiple AI providers
✓Near 100% accurate, sourceable answers
✓Document ingestion from various formats
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What's New in Celestis
1.1.1
July 12, 2026
User reviews
FAQ
What is Celestis?
Celestis is a private AI assistant designed for professionals to analyze documents and access knowledge. It offers on-device AI capabilities, allowing for offline use and ensuring data privacy.
Can I use Celestis offline?
Yes, Celestis offers offline AI bundles that provide full AI access without an internet connection. This is ideal for professionals working in remote facilities or off the grid.
How does Celestis handle my data privacy?
Celestis prioritizes data sovereignty. Private Capsules run entirely within your environment, and the platform never trains on your data or shares it without authorization.
What types of documents can I upload to Celestis?
You can upload a wide variety of document types, including PDFs, Word documents, spreadsheets, presentations, CSVs, images, and Markdown files.
Does Celestis have ads?
No, Celestis does not contain advertisements. The app is free to start and offers a premium experience without interruptions.
What AI providers does Celestis support?
Celestis supports multiple AI providers, including built-in options like Celestis and ChatGPT, open-source models, and local LLMs via Ollama for complete privacy.
How accurate are the answers provided by Celestis?
Celestis aims for near 100% accuracy with its Adaptive-RAG engine, which blends semantic and keyword search. This ensures that every answer is precise and sourceable.
What devices is Celestis available on?
Celestis is available on iPhone and iPad devices, leveraging Apple Intelligence for on-device AI processing.