2020 September, ios14 is released.
Today let's talk about major change in ios14 about IDFA(Identifier For Advertisers).
Since iOS 14, IDFA will become available only with user consent.
What is IDFA?
IDFA is UUID-identifier of the device. It is used to track app install sources, run re-marketing ad campaigns etc..
IDFA was introduced in 2016. It replaced Device ID – identifier that was unique for each iOS device.
In an effort to ensure greater privacy for users, Apple introduced new advertising ID.
The main difference is that IDFA could be reset each time user restored iOS device.
User could also reset IDFA manually or completely deny access to it through the settings (Settings > Privacy > Advertising).
What happens after iOS 14 release?
In iOS 14 IDFA will no longer be available by default. If developers want to get access to it, they need user consent by prompt alert.
How can I get IDFA?
How can I request for IDFA?
You can change the subtitle in this alert. Obviously, the majority of users will deny the request. According to various estimates, IDFA will remain available only on 10-20% of all iOS devices.
Note that AppTrackingTransparency is only available iOS 14+
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