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 is frustrating. Tiny text, constant pinching, horizontal scrolling, multi-column layouts, and research papers that never fit the screen make even simple reading feel like work. PDF Reflow makes PDFs and Word documents easier to read on mobile by turning them into a clean, phone-friendly reading experience. Instead of zooming in and out or dragging the page left and right, you can read documents in a natural vertical flow that fits your screen width. It’s especially helpful for: - research papers - reports - manuals - articles - Word documents - PDFs with figures, colors, and formulas PDF Reflow keeps the look and structure of your document while making it much easier to read on a small screen. You can also: - select and highlight text - search inside documents - adjust text size up to 300% - show the PDF in dark mode - pick a PDF inside the app If you read PDFs on your phone and hate fighting the layout, PDF Reflow is built for that problem. 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 3 weeks 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 3 weeks, Cortex every 4 months. The most recent releases landed on September 21, 2026 and September 14, 2026 respectively.
| Parameter | PDF Reflow | Cortex |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (24 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 24 — better | — |
| Update frequency | Every 3 weeks — 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 | 3 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







