PDF Reflow vs Cortex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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%
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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
Cortex
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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
Verdict
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
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.
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.
| Parameter | PDF Reflow | Cortex |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (28 ratings) — better | — |
| Positive reviews | 44.4% of reviews | — |
| Number of ratings | 28 — better | — |
| Update frequency | Every 4 days — better | Every 4 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 71 MB | 84 MB |
| Age rating | 4+ | 4+ |
| Developer | AppBlit LLC | Ippocode Technologies LLP |
In-app purchases
PDF Reflow
- PDF Reflow PRO$7.99
Cortex
- Cortex Pro$19.99
Questions
Is PDF Reflow free?
Is Cortex free?
Do PDF Reflow or Cortex have ads?
Which is updated more often, PDF Reflow or Cortex?
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