Apple had forecast revenue of $63 billion to $67 billion for the second quarter to March.
The chief executive of developer Mobicip, Suren Ramasubbu, told Reuters he was interviewed in November by a US investigator who asked about the company's interactions with Apple.
Google parent Alphabet missed revenue expectations in the fourth quarter despite stellar growth at YouTube and in the cloud.
The complaint filed on behalf of 14 families from Democratic Republic of Congo against Tesla, Apple, Alphabet Inc, Microsoft and Dell Technologies says the companies allowed forced labour that led to the death and injury of their children.
A report from the US Trade Representative's office found the tax penalises American tech companies like Google, Apple, Facebook and Amazon.
Fitbit is a pioneer in wearable technology, but it's been shredded by the competition. The company's market capitalisation soared to just under $10 billion after becoming a public company in 2015.
The disagreement came after Goldman Sachs analyst Rod Hall criticised Apple’s accounting methods for the tech giant’s new TV+ product, saying in a research note that it may result in lower gross margins and profits.
The company's new models are so similar to last year's lineup they may be upstaged by Apple TV Plus, the company's upcoming video service, which is rolling out on Nov 1 at $5 per month.
Under the changes, Apple will allow its employees to review conversations only from customers who opt into the "Siri grading" program to improve the voice recognition technology.
Apple put the programme on hold after the Guardian newspaper reported that contractors working on Apple's behalf regularly heard confidential information, drug deals and intimate bedroom talks.
Facebook acknowledged the transcriptions, which were first reported by Bloomberg, and said they were made with user permission but the practice has nonetheless been stopped.
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