![]() In some cases, IDFV will be enough to make a match, but some of our customers’ attribution providers only send IDFA. Amplitude’s attribution API will accept both IDFA and IDFV, and will attempt to match those IDs to user events it receives subsequently. Does Amplitude require IDFA on attribution events? Instead, a new random device ID will be generated, unless the user grants the application permission to use IDFA.įor all new application installs, the SDK will accept IDFA if both the user has opted in and the application chooses to use IDFA. If a user deletes and reinstalls an application that does use IDFA for device ID, the former device ID will not be retained. For customers who are doing this, the device ID was stored when the SDK was originally initialized, and it will continue to send Amplitude the same ID as long as the application remains installed on the device. There is some potential for impacts on anonymous users, however.įor anonymous users, there will be no changes in most cases, because the vast majority of Amplitude customers do not set IDFA as the device ID. Even if the device ID changes, events will continue to merge from devices when Amplitude receives a common user ID. ![]() What are the implications of Apple’s IDFA changes on user tracking?įor all logged-in users, there will be no impact. The SDK includes an option to use IDFA as the device ID, but this will only work if the user has permitted the application to use IDFA. You can always change this and opt to use whatever you want as the device identifier. ![]() It's likely that the percentage of users who choose to do so will be relatively low.ĭoes Amplitude accept IDFA (Identifier for Advertisers) as the device identifier on iOS?īy default, Amplitude’s iOS SDK uses IDFV (Identifier for Vendor) for the device ID. This means that the IDFA will only be present for users who explicitly opt-in. At WWDC 2020, Apple announced that iOS 14 will require users to opt in to tracking.
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