Comparison

Celestis vs XLNote

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Celestis

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.

Highlights
  • 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
Features
Read full description

Celestis: Private AI for Your Documents Your Knowledge. Your Data. Your AI. Celestis is an intelligent AI platform built for professionals who demand accuracy, privacy, and the freedom to work anywhere. Whether you're on a factory floor, aboard an aircraft, in a maintenance bay, or off the grid, Celestis brings full AI power to the edge and even completely offline. Celestis doesn't just chat. It understands your documents, learns from your knowledge, and delivers near 100% accurate, sourceable answers powered by an Adaptive-RAG engine. AI to the Edge: Offline. Anywhere. Always. Celestis Mobile supports on-device AI powered by Apple intelligence, letting you take your AI-powered knowledge completely offline. Get instant, accurate answers no matter where you are. - Maintenance technicians accessing service manuals in remote facilities - Factory workers querying procedures on the shop floor - Airline crews referencing documentation at 35,000 feet - Field engineers troubleshooting without a data connection Your knowledge travels with you. No Wi-Fi. No cell signal. No problem. Private Capsules: Your Data, Your Environment Capsules are the heart of Celestis. Each one is a self-contained, domain-specific AI built from your own documents. Private Capsules go further, running entirely in your environment for total data sovereignty. - Upload PDFs, Word docs, spreadsheets, presentations, CSVs, images, Markdown, and more - Combine Capsules into Pods for cross-domain AI with intelligent routing - Add custom instructions and guardrails per Capsule or Pod - Schedule automatic re-ingestion to keep your AI current Celestis never trains on your data. Your documents are never shared or retained beyond what you authorize. Choose Your AI Provider: Zero Vendor Lock-In Celestis ships ready to use with leading AI models, no API key required or bring your own. - Built-in: Celestis, ChatGPT, Claude, Grok - Open source: Any OpenAI-compatible endpoint - Local LLMs: Ollama and any locally-run model for complete privacy with zero cloud dependency Mix and match providers per Capsule. What Sets Celestis Apart - Near 100% Accuracy: Adaptive-RAG blends semantic and keyword search so every answer is precise and sourceable - On-device AI with Apple Intelligence - Powered by Apple Silicon in the cloud and green datacenters - Reader Mode: Read documents while asking questions in a seamless split view - Super AI: Augment Celestis with your Capsules to create a personalized AI that knows your domain - Simple Credit Pricing: No token math. Credits per action type, in the app or via API - Replicas Marketplace: Publish your Capsules, earn credits when others use your knowledge, creators keep 70% - Connectors: Source knowledge from Gmail, Google Drive, Notion, Slack, or any REST API Key Features - Chat with Celestis AI, always free to start - Domain-specific AI Capsules built from your documents - Offline AI Bundles for full AI access with no internet - Private Capsules running entirely in your environment - Audio Conversations and Text-to-Speech - Bring Your Own Model: ChatGPT, Claude, Grok, Ollama, and more - Capsule Collections with intelligent cross-domain routing - Reader Mode for side-by-side document reading and querying - Image generation and transformation - Live search and deep research - Connectors that connect to your MCP Servers, providing limitless data sources - Team collaboration with shared Capsule pools - Full API access for custom integrations - Analytics for Capsule performance, credit spend, and replica earnings Terms of Service: https://celestis.ai/terms-of-service Privacy Policy: https://celestis.ai/privacy-policy

About

XLNote

Features
Read full description

XLNote is an artificial intelligence note taking assistant that can extract and understand all content, and convert it into clear and actionable formatted text content for output. From casual speeches, conferences, lectures to PDF and online content - XLNote transforms scattered information into structured knowledge for you to use anytime. Extract everything -Recording and phone calls: With just one click, you can record meetings, lectures, and phone conversations. -Upload PDF and text: Automatically import documents and extract key information. Understand immediately -AI Summary: Clear and concise summaries can be obtained within seconds. -Dialogue with all your notes: ask any questions and get answers from all your content. -Lecture Summary: Transform lengthy lectures into concise and easy to understand summaries. All extracted content is well-organized: -Automatically tag and categorize content: easily organize notes. -Fragment: Save and reuse key content fragments to improve work efficiency -Merge: Merge multiple notes with one click. XLNote will undoubtedly become your preferred application for organizing your thoughts, notes, and daily life. Membership subscription instructions: 1. XLNote membership subscriptions are charged monthly, annually, and for life. During the subscription period, you can have unlimited access to all paid features and content of this software. 2. The subscription methods are continuous monthly subscription, annual membership, and lifetime membership 3. When confirming the purchase, a fee will be charged to the iTunes account 4. Continuous monthly subscriptions will automatically renew, unless automatic renewal is turned off at least 24 hours before the end of the current period. The account will charge a renewal fee within 24 hours before the end of the current period, and the renewal fee will be determined. The subscription can be managed by the user and can be turned off by going to the user's account settings after purchase. 5. Privacy Policy: http://www.keephabit.cn/Ios/XLNoteYszc.html 6. Terms of Use: http://www.keephabit.cn/Ios/XLNoteYhzcxy.html 7. Automatic Renewal Service Agreement: http://www.keephabit.cn/Ios/XLNoteZdxfxy.html

Screenshots

Celestis4 screens
XLNote4 screens

Verdict

The call

The clearest difference is iOS requirement: XLNote at 17.0 against Celestis's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Celestis ships an update every 2 weeks, XLNote every 11 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

Scorecard1 real difference · 9 level
Celestis versus XLNote: the parameters behind the verdict, then further details
ParameterCelestisXLNote
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 2 weeksEvery 11 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad — betteriPhone
Requires iOS26.017.0 — better
Further details — not scored
Size3.0 GB2 MB
Age rating12+4+
DeveloperCelestis Ai Inc林 李

In-app purchases

None

Celestis

No in-app purchases

None

XLNote

No in-app purchases

Questions

Is Celestis free?
Celestis is free to download, with no in-app purchases.
Is XLNote free?
XLNote is free to download, with no in-app purchases.
Do Celestis or XLNote have ads?
Neither Celestis nor XLNote shows ads.
Which is updated more often, Celestis or XLNote?
Celestis ships an update every 2 weeks, and XLNote every 11 days. Most recently, Celestis was updated on October 31, 2026 and XLNote on November 6, 2026.

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