Apple has warned that "EU-style rules" proposed by the UK competition watchdog "are bad for users and bad for developers".
It says EU laws - which have sought to make it easier for smaller firms to compete with big tech - have resulted in some Apple features and enhancements being delayed for European users.
It argues the UK risks similar hold-ups if the Competition and Markets Authority (CMA) pushes ahead with plans designed to open up markets the regulator says is too dominated by Apple and Google.
The CMA told the BBC it rejected Apple's characterisation of UK competition rules, arguing they were different from those in the EU and helped businesses innovate and grow.
Apple's intervention comes as international tech regulation was sharply criticised by President Donald Trump.
