● CASE STUDY · IDENTIUM TECH SOLUTIONS · PLAY STORE
Identium NFC
A complete NFC toolkit, shipped free on the Play Store.
OVERVIEW
Identium NFC is a complete, published NFC toolkit that ships free with every Identium NFC tag. It reads, writes, locks, password-protects, copies, clones and verifies NTAG21x, Mifare Ultralight/Classic and NFC Forum Type 4 tags, with 12 record types, bulk programming, templates and a stats dashboard.
THE CHALLENGE
A store-shipped utility has to be deep enough for engineers and safe enough for anyone, while staying lean, dependency-free and privacy-clean enough to pass Play Store review.
WHAT I BUILT
- 01
A chip-level raw command driver for NTAG21x (READ / FAST_READ / WRITE / PWD_AUTH, lock bytes, configurable AUTH0), plus byte-for-byte raw cloning and NDEF-level cross-chip copy.
- 02
Dependency-free XLSX parsing (no Apache POI) by unzipping and reading sharedStrings/sheet XML through the platform SAX parser, which keeps the APK tiny.
- 03
Bulk CSV/XLSX programming with auto-incrementing serials and reusable templates.
- 04
Material 3 UI with a branded sonar tap animation, plus a written privacy policy and full store assets for a clean review.
OUTCOME
A real, published Android app that Identium's customers use daily, and proof I've shipped to a public store rather than only internal tools.
GALLERY
