📚 Buying & Reference
5 guides — General-purpose buyer's references that don't fit one vertical: how to choose RFID readers and writers, real-world card and wristband cost breakdowns, how long RFID tags last in different environments, and iPhone-vs-Android NFC business card compatibility.
Choose RFID readers in a fixed order — credential protocol, reader class, then SDK and OS fit — before comparing models across the $30-3,500 span. A reader that cannot talk to the production software is scrap, so SDK, driver and operating-system fit come before enclosure design. A 2-4 week proof-of-workflow pilot with 2-3 candidate readers against real credentials eliminates 90% of the risk before the order scales.
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A finished RFID card runs US$0.30-0.70 for MIFARE Classic 1K in PVC at volume, up to US$2-6+ for premium bodies with high-security chips. Those are industry-reference ranges assembled from Proud Tek's published guides and independent 2026 pricing reports, not a Proud Tek quote. Four levers set the price: chip/security tier, substrate material, order volume, and personalization; a 50,000-unit committed order runs 30-50% below a 1,000-unit pilot per card.
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RFID wristband cost runs US$0.18-0.45 for single-use Tyvek and US$0.40-0.65 for reusable silicone — industry-reference ranges, not quotes. Medical-grade and high-security bands (DESFire EV3, UCODE-class) can reach US$0.70-2.00+. Material class, chip tier and order volume set the price, in that order. Ranges draw on Proud Tek's published durability data and independent 2025-2026 industry pricing reports; use the cost estimator or an RFQ for a number specific to your programme.
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RFID lifespan in practice: a standard PVC hotel card lasts 2-4 years, a textile laundry tag 200-300 wash cycles (PPS runs 300-500), a reusable silicone wristband 12-36 months. Substrate, environment and handling set those numbers — not chip family, since chips are rated for 100,000+ write cycles and 10-25 years of retention. This guide gives service-life ranges per format, the stressors that halve them, replacement-cost modelling, and the 4-8 week pilot that validates a real deployment.
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A deployment playbook for NFC business cards that survive real iPhone and Android device variance. Covering iOS Background Tag Reading behaviour (iPhone 7+, iOS 14+), Android launcher and NFC-settings variance, URL payload simplicity vs vCard handoff, phone-case and MagSafe interference, the device-OS-case test matrix, and the QR fallback discipline that prevents 10-20% of intended taps from failing silently at the networking moment.
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