What is a UDID?
A UDID (Unique Device Identifier) is a string of letters and numbers that uniquely identifies your specific Apple device. Every iPhone, iPad, Mac, Apple Watch, Apple TV, and Apple Vision Pro has one. It's built into the hardware and cannot be changed, like a serial number that Apple's developer infrastructure uses to identify individual devices. Your UDID is important when purchasing a paid signing certificate from the FlareStore Store. Paid certificates require your UDID to be individually registered on the certificate's provisioning profile. This is what ties the certificate specifically to your device, keeps usage private, and dramatically reduces revocation risk compared to shared certificates. Note that free and enterprise certificates don't require UDID registration (they use broad provisioning), which is one reason they're so easily detected and revoked by Apple.
How the UDID Grabber Works
FlareStore's UDID Grabber retrieves your device identifier through Apple's device enrollment protocol. When you tap the button, your device downloads a small configuration profile that collects your UDID and sends it back to our server. The profile is immediately removed from your device afterward. It doesn't install anything permanent or change any settings. This process works on every Apple platform: iPhone, iPad, Mac, Apple Watch, Apple TV, and Apple Vision Pro. On Mac, you can also find your UDID through System Information or the Terminal, but the web-based grabber is the fastest method and works identically across all devices. Once you have your UDID, head to flarestore.vip to purchase a certificate with your device registered on it. This is the recommended path for reliable, long-lasting sideloading.