Norkta vs Cortex
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Norkta
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Meet Norkta, the privacy-focused PDF powerhouse designed for efficiency. KEY FEATURES โข Compress: Reduce file sizes significantly while maintaining quality. โข Invert Colors: Two algorithms that transform standard PDFs for a comfortable Dark Mode reading experience. โข Merge: Combine multiple documents into a single file in seconds. โข Extract Text: Instantly grab text content from your PDFs for editing or sharing. WHY NORKTA? โข 100% Local Processing: Your data stays on your device. No servers, no uploads. Simple, fast, and secure. โข Clean and intuitive interface design that keep your process focused and efficient. Take control of your PDFs starting today!
Cortex
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Cortex reads your images, documents, and text โ 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 โ speak naturally, get spoken replies. Fully on-device, nothing stored - Audio & video input โ attach media files and ask questions about them - Image & document input โ analyse photos, contracts, receipts, prescriptions and more - Fully offline after model download โ works on a plane, in a courthouse, anywhere - Zero data collection โ nothing is ever transmitted or stored outside your device - 43 supported languages โ switch freely between languages in any conversation - One-time purchase โ no monthly subscription, no usage limits after going Pro - Free tier included โ 25 messages per day at no cost, upgrade whenever you're ready - GDPR-friendly โ 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 โ use it forever.
Screenshots
Verdict
The clearest difference is iOS requirement: Cortex at 15.1 against Norkta's 18.6. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Norkta sells 3 in-app purchases, starting at $0.99 per month and Cortex sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Norkta ships an update every 2 months, Cortex every 4 months. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.
| Parameter | Norkta | Cortex |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months โ better | Every 4 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 18.6 | 15.1 โ better |
| Further details โ not scored | ||
| Size | 2 MB | 84 MB |
| Age rating | 4+ | 4+ |
| Developer | Zixiang Zhang | Ippocode Technologies LLP |
In-app purchases
Norkta
- Norkta Pro Monthly$0.991 Month
- Norkta Pro Yearly$2.991 Year
- Norkta Pro Lifetime$6.99
Cortex
- Cortex Pro$19.99
Questions
Is Norkta free?
Is Cortex free?
Do Norkta or Cortex have ads?
Which is updated more often, Norkta or Cortex?
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