eSIMManager: A Pre-Flight Checklist for Travel eSIMs

Field notes

The app turns scattered travel eSIM credentials into card records containing QR codes, LPA details, destination, validity period, and notes. Import can begin from a camera scan, image, supplier PDF, or pasted activation string, while optional password protection encrypts JSON backups with AES-256-GCM. Its traffic counter reads device-level cellular byte totals through the Darwin BSD getifaddrs interface, so the page explicitly distinguishes that estimate from a carrier's remaining allowance.