Posts with tag: 'Half Life'

The Shifting Sands of Device Identifiers

Or, The Half-Life of User Agents One of the key identifiers that WURFL uses to detect devices is the user agent (UA) string. This string morphs based on the device, OS version, browser version and several other dimensions. Over the lifecycle of a device, that device’s user agent will change – especially if you are gadget geek who upgrades, experiments with alternate browsers, or generally fiddles around with his/her phone or tablet. So, we knew UA string change, but how quickly do we see the universe of active user agents change? If we see a user agent this month, what […]

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