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Flutter Biometric Auth With local_auth

by Muhammad Uzair dev.to

8 min read

HerCycle, a privacy-first period tracker I built, stores everything on the device: cycle logs, symptom history, health reports. There is no account, no registration, and no server sync. That privacy promise only holds if the phone itself cannot be picked up and read by anyone else, which is why the app ships a PIN and biometric app lock. The lock is the feature that makes the rest of the architec…

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