CENFC vs CatKey
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CENFC
This advanced toolkit allows you to scan, identify, and analyze NFC tags directly on your device. It supports various NFC protocols, enables memory dumping, and allows for reading and writing NDEF messages. Additionally, it can read electronic passports and offers raw communication capabilities for developers.
- NFC tag scanning and identification
- Full NFC tag memory dumping
- NDEF message creation, reading, and writing
- Electronic passport (eMRTD) reader
- Raw APDU command communication
- Protocol analysis tools (Hex Converter, CRC Calculator)
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CENFC is an advanced NFC toolkit for iOS. Scan, identify, dump, and analyze NFC tags — all processed locally on your device with zero data collection. SCANNER Instantly identify NFC tags through ATQA/SAK lookup and protocol probing. Supports ISO 14443, ISO 18092 (FeliCa), and ISO 15693. Accurately detects chip variants and card families, displaying UID, protocol details, and iOS operability status at a glance. MEMORY DUMP Read the complete memory of any operable NFC tag. Browse page-by-page and block-by-block breakdowns with parsed NDEF content. Export dumps in hex, JSON, or raw binary for forensic analysis or backup. NDEF READ & WRITE Create, read, and write NDEF messages to compatible tags. Supports Text, URI, Smart Poster, MIME, and External record types. Build multi-record messages from scratch and write them directly to any writable tag. PASSPORT READER Read electronic passports and travel documents (eMRTD) via BAC authentication. Enter MRZ data to securely access data groups — including MRZ, face image, additional personal details, and security objects. Perform Active Authentication to verify chip genuineness. RAW COMMUNICATION Send custom APDU commands directly to NFC tags. Full ISO 7816 APDU support with complete command logging — built for developers and researchers. PROTOCOL TOOLS - Hex Converter — Convert between hex, decimal, binary, and ASCII - CRC Calculator — Compute CRC_A and CRC_B per ISO 14443-3 - ATQA/SAK Lookup — Identify card type from raw protocol parameters - Access Bits Decoder — Decode sector-level permissions - BER-TLV Parser — Parse and visualize TLV data structures OPEN SOURCE & PRIVACY FIRST CENFC is fully open source — inspect every line of code yourself. Every NFC operation runs entirely on-device. No data leaves your phone. No servers. No account required. Requires iPhone 7 or later with NFC capability.
CatKey
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CatKey is the only iOS keyboard dedicated to Catalan language support. When Apple removed Catalan spell checking in iOS 17.4, millions of Catalan speakers lost a basic tool. CatKey brings it back - and makes it better. BUILT FOR CATALAN SPEAKERS CatKey (teclat catala) was created because no existing keyboard treats Catalan as a first-class language. Gboard and SwiftKey support 75+ languages but none offer dedicated Catalan spell checking. CatKey is Catalan-first, not an afterthought. CORE FEATURES (FREE FOREVER) - Catalan spell checking (corrector ortografic) with a dedicated dictionary - Autocorrect that understands Catalan word structure - Word prediction with smart suggestions - Seamless Catalan-Spanish bilingual switching with automatic language detection - Full QWERTY layout with all Catalan characters via long-press (accents on a, e, i, o, u, cedilla c, interpunct) - Number and symbol keyboards - Haptic feedback with adjustable intensity - Sound feedback on key presses - Adjustable keyboard height: compact, standard, or tall - Space bar shows detected language (Catala, Espanol, English) - Step-by-step onboarding guide for first-time setup CATALAN PRO - ONE-TIME PURCHASE Upgrade once, own it forever. No subscriptions. - Enhanced word prediction with 5 candidates - Advanced autocorrect with deeper error detection - Dialect selection: Balearic and Valencian - Custom dictionary: add your own words - Theme customization with Catalan-inspired designs (Modernisme, Mediterranean, Trencadis) - Professional dictionaries (legal, medical, education) - Priority support PRIVACY FIRST CatKey works entirely offline. No data is collected, transmitted, or stored on any server. Your words stay on your device. Full Access is required only for the keyboard to function - it never sends your typing anywhere. IN-APP PURCHASE CatKey Pro is a one-time purchase of $3.99. No recurring charges. Restore purchases is supported for reinstallations. Download CatKey today and type confidently in Catalan.
Screenshots
Verdict
The clearest difference is in-app purchases: CENFC at none against CatKey's 1. CENFC also leads on update cadence (every 3 days vs every 2 months). On price, ads, 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
Both are free to download. CatKey sells 1 one-off in-app purchase. CENFC asks for nothing beyond the download.
CENFC ships an update every 3 days, CatKey every 2 months. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.
| Parameter | CENFC | CatKey |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 3 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 — better | 17 |
| Further details — not scored | ||
| Size | 9 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | 子衎 王 | 贺 周 |
In-app purchases
CENFC
No in-app purchases
CatKey
- CatKey Pro$3.99









