Apple has blocked Google from running its internally-built iOS apps.
Google has been running a voluntary programme offering an incentive to users who allow Google to monitor their activities through an installed app.
It would appear that the block is in response to a violation of Apple’s developer terms since the licence under which the app was developed restricts it to employees — instead of which, it was distributed more widely.
The two companies have both indicated that they are working together to solve the impasse.