Comparison

PDF Reflow vs Cortex

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

Head to head
About

PDF Reflow

Read PDF and Word documents on your phone with a mobile-optimized layout. It reformats documents to fit your screen width, preserving original fonts, colors, and graphics. Features include text search, selection, and adjustable text size.

Highlights
  • Mobile-optimized PDF and Word reading
  • Reflows text to fit screen width
  • Preserves original fonts, colors, and graphics
  • Text search and selection
  • Adjustable text size up to 300%
Features
Read full description

Reading PDFs on your phone shouldn’t feel like work. PDF Reflow transforms PDFs and Word documents into a clean, phone-friendly reading experience. No more tiny text, constant pinching, horizontal scrolling, or multi-column pages that don’t fit your screen. The latest version uses AI-powered page analysis to better understand each document’s layout, including text, graphics, figures, tables, and mathematical formulas. It then reorganizes the content into a natural vertical flow while preserving the document’s structure and visual context. PDF Reflow is ideal for: • Research papers • Reports and manuals • Articles • Word documents • Technical and scientific PDFs • Documents with figures, tables, colors, and formulas Features include: • AI-powered page and layout analysis • Comfortable, screen-width reading • Text selection and highlighting • Search within documents • Adjustable text size up to 300% • Automatic Table of Contents • Dark mode for PDFs • Built-in document picker If you read PDFs on your phone and are tired of fighting the original page layout, PDF Reflow is made for you. Questions or feedback? laurent@appblit.com

About

Cortex

Read full description

Cortex reads your images, documents, and text — entirely on your device. No cloud. No account. No data sent anywhere. After a one-time model download, it works with no internet connection at all. Built for professionals who can't hand their confidential work to a cloud service, Cortex gives you the full power of a modern AI without the data exposure. No terms of service that claim rights to your inputs. No server logs. No risk of a breach leaking your client's name. Key features: - Voice mode — speak naturally, get spoken replies. Fully on-device, nothing stored - Audio & video input — attach media files and ask questions about them - Image & document input — analyse photos, contracts, receipts, prescriptions and more - Fully offline after model download — works on a plane, in a courthouse, anywhere - Zero data collection — nothing is ever transmitted or stored outside your device - 43 supported languages — switch freely between languages in any conversation - One-time purchase — no monthly subscription, no usage limits after going Pro - Free tier included — 25 messages per day at no cost, upgrade whenever you're ready - GDPR-friendly — no data transfers to US servers or third parties Cortex runs a powerful on-device language model entirely on your hardware, giving you conversational AI that's fast and capable without any cloud dependency. Download free and try it today. Upgrade once — use it forever.

Screenshots

PDF Reflow4 screens
Cortex4 screens

Verdict

The call

The clearest difference is update cadence: PDF Reflow at every 4 days against Cortex's every 4 months. On price, ads, in-app purchases and device support 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 Reflow sells 1 one-off in-app purchase and Cortex sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

PDF Reflow ships an update every 4 days, Cortex every 4 months. The most recent releases landed on October 23, 2026 and October 2, 2026 respectively.

Scorecard1 real difference · 9 level
PDF Reflow versus Cortex: the parameters behind the verdict, then further details
ParameterPDF ReflowCortex
PriceFreeFree
Rating3.6 (28 ratings) — better—
Positive reviews44.4% of reviews—
Number of ratings28 — better—
Update frequencyEvery 4 days — betterEvery 4 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.1 — better
Further details — not scored
Size71 MB84 MB
Age rating4+4+
DeveloperAppBlit LLCIppocode Technologies LLP

In-app purchases

1 purchases

PDF Reflow

One-time1
  • PDF Reflow PRO$7.99
1 purchases

Cortex

One-time1
  • Cortex Pro$19.99

Questions

Is PDF Reflow free?
PDF Reflow is free to download, with in-app purchases available.
Is Cortex free?
Cortex is free to download, with in-app purchases available.
Do PDF Reflow or Cortex have ads?
Neither PDF Reflow nor Cortex shows ads.
Which is updated more often, PDF Reflow or Cortex?
PDF Reflow ships an update every 4 days, and Cortex every 4 months. Most recently, PDF Reflow was updated on October 23, 2026 and Cortex on October 2, 2026.

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