KDM Inspector vs Trip Reader (NFC)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KDM Inspector
This utility app helps professionals working with Digital Cinema Packages (DCPs) and KDM encryption keys. It allows users to quickly open and view essential key information directly from their iOS device, supporting various file formats.
- Open KDM keys from email
- View key active and expiration times
- See show player public key and UUID
- Supports .xml and .zip KDM files
- Mobile DCP/KDM management
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Check KDM playback windows, content titles, and server details on your iPhone or iPad. Built for projectionists, theater technicians, post-production facilities, and anyone working with Digital Cinema Packages (DCPs), KDM Inspector turns Key Delivery Message (KDM) XML files into clear, readable information. Open a key from Mail or Files, or import a ZIP containing multiple KDMs. Keep the details in a searchable library for quick reference before your next screening. With KDM Inspector, you can: - See whether a playback window is Active, Upcoming, or Expired. - View start and expiration times in your local time zone or UTC. - Find server or media block serial numbers when recognized in the KDM. - Inspect content titles, composition playlist IDs, message IDs, and content key counts. - View recipient details, certificate serial numbers, and show player public key thumbprints. - Search by title, server serial number, recipient, filename, or composition playlist ID. - Filter your library by playback status. - Share a readable summary of key details. Designed for iPhone and iPad, with Dark Mode, support for larger text, and Liquid Glass controls on iOS and iPadOS 26 or later. KDM information is read and stored on your device. No account or upload is required. Active, Upcoming, and Expired describe the playback time window recorded in the KDM.
Trip Reader (NFC)
Access your Chinese public transit card's balance and transaction history using your iPhone's NFC reader. View station names, monthly discounts, and bus routes without needing internet or Bluetooth. Save your travel history and sync it across devices.
- Read balance and history
- Show station names
- Track monthly discounts
- Display bus route numbers
- Save travel history
- Sync to iCloud
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Trip Reader uses iPhone's internal NFC reader to get balance and history from public transit cards issued across China. No Internet or Bluetooth is needed. Main features: • Balance and history • Show station names • Monthly discount policy and progress • Bus route number • Save history and comments • Sync to iCloud ************************************** Beijing Yikatong is not supported due to technical reason. ************************************** Cards supported: • Beijing Hutong Card (京津冀互联互通卡, with T-Union mark) • Tianjin City Card (with T-Union mark) • Nanjing City Card (with T-Union mark) • Suzhou Citizen Card • Shanghai Public Transportation Card (Purple card and T-Union card) • Kunshan Citizen Card • Guangzhou Yang Cheng Tong (CPU card only) • Lingnan Pass • Shenzhen Tong (FeliCa type not supported) • Chengdu Tianfu Tong (CPU card only) • Other T-Union or City Union cards issued across China (some dual-module cards may show T-Union history only) Note: Student cards, senior cards etc. are not supported. This app does not have access to official database. Please use with caution and do not rely on the result.
Screenshots
Verdict
The clearest difference is price: Trip Reader (NFC) at Free against KDM Inspector's $2.99. Trip Reader (NFC) also leads on rating (4.7 vs 4.0) and update cadence (every 2 months vs every 38 months). On review sentiment, ads, in-app purchases and monetization model 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
Trip Reader (NFC) is free to download; KDM Inspector costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Trip Reader (NFC) holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Trip Reader (NFC) has 483 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 100% of KDM Inspector's written reviews are positive against 93% of Trip Reader (NFC)'s, so the app with the better star average is not the one people write more warmly about.
KDM Inspector ships an update every 38 months, Trip Reader (NFC) every 2 months. The most recent releases landed on September 30, 2026 and September 26, 2026 respectively.
| Parameter | KDM Inspector | Trip Reader (NFC) |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.0 (1 ratings) | 4.7 (483 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 92.9% of reviews |
| Number of ratings | 1 | 483 — better |
| Update frequency | Every 38 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Jonathan Judelson | Domosekai Limited |
Customer experience
KDM Inspector
Trip Reader (NFC)
In-app purchases
KDM Inspector
No in-app purchases
Trip Reader (NFC)
No in-app purchases
Questions
Is KDM Inspector free?
Is Trip Reader (NFC) free?
Which has better reviews, KDM Inspector or Trip Reader (NFC)?
Do KDM Inspector or Trip Reader (NFC) have ads?
Which is updated more often, KDM Inspector or Trip Reader (NFC)?
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