Comparison

CENFC vs OverLens

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

Head to head
About

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.

Highlights
  • 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)
Read full description

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.

About

OverLens

Features
Read full description

OverLens is a floating translation lens. Point it at any app — games, manga, chats, menus — and read the translation right where the original text was. HOW IT WORKS 1. Tap "Start Translating" and confirm the system screen-broadcast prompt. 2. A small lens floats over whatever app you're using. 3. Text next to the lens is recognized, translated and redrawn inside the lens — live, as you scroll. WHY OVERLENS • Works on top of ANY app — no copy-paste, no switching apps, no screenshots • Fully on-device: screen content never leaves your iPhone • Works offline once language packs are downloaded • 20 languages: English, Japanese, Korean, Chinese, Spanish, French, German, Italian, Portuguese, Russian, Arabic and more • No account, no tracking of your screen, no cloud PRICING • Free full-featured trial — feel the real thing before you pay • After the trial, 5 free minutes every day • OverLens Pro: one-time purchase, unlimited time, all language pairs. No subscription — pay once, never pay again OverLens uses Apple's on-device translation. Language packs are downloaded through iOS and managed in Settings. Privacy Policy: https://twelvefold.co/overlens/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

CENFC4 screens
OverLens4 screens

Verdict

The call

The clearest difference is in-app purchases: CENFC at none against OverLens's 1. CENFC also leads on iOS requirement (16.0 vs 18.0). On price, update cadence, ads 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. OverLens sells 1 one-off in-app purchase. CENFC asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

Scorecard2 real differences · 7 level
CENFC versus OverLens: the parameters behind the verdict, then further details
ParameterCENFCOverLens
PriceFreeFree
Rating5.0 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 3 daysEvery 3 days
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone, iPad — better
Requires iOS16.0 — better18.0
Further details — not scored
Size9 MB7 MB
Age rating4+4+
Developer子衎 王Twelvelefold Limited

In-app purchases

None

CENFC

No in-app purchases

1 purchases

OverLens

One-time1
  • OverLens Pro$12.99

Questions

Is CENFC free?
CENFC is free to download, with no in-app purchases.
Is OverLens free?
OverLens is free to download, with in-app purchases available.
Do CENFC or OverLens have ads?
Neither CENFC nor OverLens shows ads.
Which is updated more often, CENFC or OverLens?
CENFC ships an update every 3 days, and OverLens every 3 days. Most recently, CENFC was updated on October 6, 2026 and OverLens on October 11, 2026.

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