Comparison

Offprint vs Celestis

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

Head to head
About

Offprint

Easily save web pages as clean PDFs, EPUBs for e-readers, or Markdown documents. This tool removes ads and clutter, allowing you to archive articles, send them to your e-reader, or integrate them into your note-taking apps.

Highlights
  • Save web pages as PDF, EPUB, or Markdown
  • Removes ads and clutter from web pages
  • Reader mode for articles
  • Page content mode for more comprehensive captures
  • Share to various apps and devices
  • On-device conversion for privacy
Features
Read full description

Offprint turns the web page you're reading into a file you can keep — a clean PDF, an EPUB for your e-reader, or a Markdown document for your notes. Open any article in Safari, tap the Offprint extension, pick a format, and share it anywhere. No copy-pasting, no cluttered printouts, no account. Offprint strips the ads, banners, and pop-ups and keeps what matters: the text, the images, and the structure of the article. THREE FORMATS, ONE TAP • PDF — a clean, paginated document for printing, annotating, or archiving • EPUB — a real e-book you can send to Kindle, Apple Books, or any e-reader • Markdown — plain-text formatting that drops straight into Obsidian, Notion, Bear, or any notes app MADE FOR READING • Reader mode extracts just the article — no ads, no navigation, no cookie banners • Page content mode captures more of the page — cleaned-up text and images, not the website's layout • Built-in preview shows exactly what you'll get before you share it FITS YOUR WORKFLOW • Works directly in Safari — no switching apps, no pasting URLs • Share sheet integration: AirDrop it, save to Files, send to Kindle, attach to mail • Conversion happens on your device — nothing is uploaded, nothing is tracked WHO IT'S FOR • Readers building an offline library of articles for flights and commutes • Students and researchers archiving sources as PDFs • Note-takers clipping articles into their Markdown knowledge base • E-reader owners who'd rather read long articles on a paper-like screen Save the page in front of you — in the format you actually use.

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

Screenshots

Offprint3 screens
Celestis4 screens

Verdict

The call

The clearest difference is in-app purchases: Celestis at none against Offprint's 3. Celestis also leads on update cadence (every 2 weeks vs every 2 months). Offprint's advantage is iOS requirement (17.0 vs 26.0). On price, rating, review sentiment and ratings volume 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. Offprint sells 3 one-off in-app purchases. Celestis asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Offprint against 5.0 for Celestis. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Offprint ships an update every 2 months, Celestis every 2 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Offprint versus Celestis: the parameters behind the verdict, then further details
ParameterOffprintCelestis
PriceFreeFree
Rating5.0 (3 ratings)5.0 (4 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings34 — better
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS17.0 — better26.0
Further details — not scored
Size20 MB3.0 GB
Age rating4+12+
DeveloperNikolai RodionovCelestis Ai Inc

Customer experience

Offprint

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Celestis

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Offprint

One-time3
  • Small Tips$0.99
  • Tips medium$3.99
  • Tips large$9.99
None

Celestis

No in-app purchases

Questions

Is Offprint free?
Offprint is free to download, with in-app purchases available.
Is Celestis free?
Celestis is free to download, with no in-app purchases.
Which has better reviews, Offprint or Celestis?
Offprint and Celestis are both rated 5.0 out of 5 on the App Store, from 3 and 4 ratings respectively.
Do Offprint or Celestis have ads?
Neither Offprint nor Celestis shows ads.
Which is updated more often, Offprint or Celestis?
Offprint ships an update every 2 months, and Celestis every 2 weeks. Most recently, Offprint was updated on November 5, 2026 and Celestis on October 31, 2026.

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