Comparison

PDF AI vs CrackX

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

Head to head
About

PDF AI

This application offers a comprehensive suite of AI-powered tools for managing PDF documents. Users can edit text and images, generate AI summaries, convert files to various formats, and securely sign documents. It prioritizes speed and privacy with local processing and encryption.

Highlights
  • Edit PDF text and images
  • AI-powered summaries and highlights
  • Annotate and collaborate on documents
  • Fill and e-sign forms
  • Convert PDFs to Word, Excel, PPT, Images, TXT
  • Secure offline scanning and organization
Features
Read full description

AI-powered PDF toolkit built for speed, security, and clarity. Chat with PDFs, summarize long documents, generate slides, create podcast-style audio, scan, edit, convert, sign, and collaborate—without friction. What you can do • Chat with PDFs: Ask questions and get instant answers from documents. • Summarize smarter: Turn long PDFs, reports, papers, and books into clear key points. • Generate with AI: Create slides, podcast-style audio, visual digests, and insight cards from documents. • Edit PDFs: Modify text, images, and layout with precision. • Read smarter: AI summaries, highlights, bookmarks, day/night/Sepia. • Annotate & collaborate: Highlight, underline, notes, sketches, comments, and share. • Fill & sign: Complete interactive forms and e‑sign on the go. • Convert fast: PDF ⇄ Word/Excel/PPT/Images/TXT with high fidelity. • Scan & organize: Scan documents, extract text with OCR, search, manage, and work offline securely. Why it’s better • AI tools for reading, understanding, presenting, and listening to documents. • Lightning-fast viewer for large PDFs. • Privacy-first: local processing and strong encryption. • Professional output, zero watermarks for subscribers. • Continuous updates with new AI capabilities. VIP (auto‑renewable subscriptions) • Monthly or yearly plans available. • Unlock premium tools: advanced editing, full‑text search, batch processing, high‑quality exports, AI summaries, AI chat, AI slides, podcast-style audio, visual digests, OCR, conversion tools, and more. Policies • Privacy: https://sophoninc.com/privacy.html • Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ • Terms of Service: https://sophoninc.com/terms.html Contact • Email: feedback@sophoninc.com

About

CrackX

Features
Read full description

Optimization of a Mixed-Feed Steam Cracker App is an interactive engineering tool for evaluating steam cracking performance and CO₂ storage feasibility. The app allows users to configure operating scenarios, compare key performance indicators, estimate process outputs, and assess whether captured CO₂ can be safely stored in a geological reservoir. It includes performance metrics, feasibility results, visual charts, and report generation to support academic analysis and technical decision-making. Designed for chemical and petroleum engineering education, the app helps connect process optimization with carbon management in one workflow.

Screenshots

PDF AI4 screens
CrackX4 screens

Verdict

The call

The clearest difference is in-app purchases: CrackX at none against PDF AI's 5. CrackX also leads on ads (none vs shown). On price, device support and iOS requirement 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. PDF AI sells 5 in-app purchases, starting at $7.99 per 7 days. CrackX asks for nothing beyond the download.

Scorecard2 real differences · 8 level
PDF AI versus CrackX: the parameters behind the verdict, then further details
ParameterPDF AICrackX
PriceFreeFree
Rating4.8 (160 ratings) — better—
Positive reviews88.4% of reviews—
Number of ratings160 — better—
Update frequencyEvery 3 weeks—
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.014.0 — better
Further details — not scored
Size169 MB26 MB
Age rating4+4+
DeveloperYang YangFatima Bazroun

In-app purchases

5 purchases

PDF AI

Subscriptions5
  • Weekly VIP$7.997 Days
  • Weekly VIP$9.997 Days
  • Weekly VIP3 Days trial$9.997 Days
Show 2 more
  • Monthly VIP3 Days trial$14.991 Month
  • Yearly VIP3 Days trial$59.991 Year
None

CrackX

No in-app purchases

Questions

Is PDF AI free?
PDF AI is free to download, with in-app purchases available.
Is CrackX free?
CrackX is free to download, with no in-app purchases.
Do PDF AI or CrackX have ads?
PDF AI shows ads; CrackX does not.

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