IDFA Viewer+ vs NFC Reader & Writer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
IDFA Viewer+
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IDFA Viewer is a free app that allows you to easily check, copy, and share your device’s advertising identifier (IDFA) on iOS. Request tracking authorization within the app, and once granted, you can display, copy to clipboard, and share your IDFA with a single tap. This app is ideal for those who need the IDFA for ad measurement, debugging, or marketing purposes. 【Main Features】 - Display your device’s IDFA (Advertising Identifier) - Copy and share IDFA - Request tracking authorization - Simple and user-friendly interface 【Note】 Obtaining the IDFA requires user tracking authorization. If permission is not granted, the IDFA will not be displayed.
NFC Reader & Writer
This application allows you to read, write, and manage NFC tags directly from your iPhone. It provides detailed tag analysis, supports various record types for writing, and keeps a history of all your scans.
- Read NFC tag information
- Write NDEF records to tags
- Manage tags (erase, lock)
- Scan history with timestamps
- Detailed tag analysis
- Support for various NFC standards
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NFC Reader & Writer – NFC Tool is a full-featured NFC tag reader, writer, and manager — everything you need to explore and interact with NFC technology right from your iPhone. READ NFC TAGS Hold your iPhone near any NFC tag to instantly retrieve complete tag information: UID, tag type, manufacturer, storage capacity, NDEF records, and RF technology specs. Supports MIFARE, ISO 15693, FeliCa, ISO 7816, and more. WRITE NFC TAGS Write one or more NDEF records to any writable NFC tag. Supported record types: · URL · Plain Text · Phone Number · Email Address · SMS (with message body) · Wi-Fi Credentials (SSID & Password) · Geographic Location · Contact Card (vCard) · Custom Type MANAGE TAGS · Erase — wipe all data from a tag · Lock — make a tag permanently read-only to protect its contents SCAN HISTORY Every scan is automatically saved with a timestamp and full tag details. Browse your history, tap any entry for a full breakdown, or swipe to delete individual records. DETAILED TAG ANALYSIS · UID with hex display · Automatic manufacturer identification (48+ vendor database) · MIFARE / NTAG product identification · NDEF status and storage usage · Raw NDEF payload inspector (developer mode) SETTINGS · Haptic feedback on successful scan · Auto-save history toggle · Raw NDEF data display for developers Requirements: NFC-capable iPhone (iPhone 7 or later) running iOS 14 or later. Support: tinfineapp@outlook.com Privacy Policy: https://decisive-store-bd5.notion.site/Privacy-Policy-325e1846c58e80c9b97ef5bbcb84153a Terms of Use: https://decisive-store-bd5.notion.site/Terms-Conditions-325e1846c58e807ea957d6e0eeafa9f0
Screenshots
Verdict
The clearest difference is ads: NFC Reader & Writer at none against IDFA Viewer+'s shown. NFC Reader & Writer also leads on chart position (#71 vs unranked) and iOS requirement (17 vs 26.2). On price, 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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | IDFA Viewer+ | NFC Reader & Writer |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Update frequency | — | Every 2 days |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | — | Free |
| Best chart rank | — | #71 — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 26.2 | 17 — better |
| Further details — not scored | ||
| Size | 6 MB | 8 MB |
| Age rating | 12+ | 4+ |
| Developer | sarah yamaoka | 裕涛 兰 |
In-app purchases
IDFA Viewer+
No in-app purchases
NFC Reader & Writer
No in-app purchases





