Question 1

How to get a consistent UDID format on all platforms with flutter_udid?

Accepted Answer

Use the consistentUdid method, which returns a SHA-256 hash in a uniform format like '984725b6c4f55963cc52fca0f943f9a8060b1c71900d542c79669b6dc718a64b' across iOS, Android, macOS, Windows, and Linux, as shown in the README example.

Question 2

What happens to the UDID after an Android factory reset?

Accepted Answer

The UDID may change after a factory reset because it relies on system-level identifiers like ANDROID_ID, which can be reset. The README explicitly notes this limitation, so it's not suitable for absolute persistence.

Question 3

Is flutter_udid GDPR compliant for user tracking in Europe?

Accepted Answer

Not inherently; since it provides a persistent device identifier, it can be considered personal data under GDPR. Developers must implement consent mechanisms and data protection measures to ensure compliance, as the plugin itself doesn't handle privacy regulations.

Question 4

How does flutter_udid compare to device_info_plus for getting device IDs?

Accepted Answer

flutter_udid focuses on persistent IDs across reinstalls using methods like Keychain and ANDROID_ID, while device_info_plus provides general device info but may not guarantee persistence. Use flutter_udid for stable tracking; device_info_plus for broader device details.

Question 5

Can the UDID be spoofed on rooted Android devices?

Accepted Answer

Yes, on rooted devices, the ANDROID_ID can be manipulated, allowing users to change the UDID. The README warns about this, so it's less secure in such environments and shouldn't be relied upon for critical security features.

Question 6

How should I handle UDID changes when updating my app's signing key?

Accepted Answer

Ensure you use the same digital signature for all app versions; if the key changes, the UDID might reset. The README advises this, so plan key management carefully to avoid disrupting user identification in production.

UDID

What is UDID?

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